CN102251202B - Hot dip aluminum-silicon coating technology and use thereof - Google Patents
Hot dip aluminum-silicon coating technology and use thereof Download PDFInfo
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- CN102251202B CN102251202B CN201010177069.3A CN201010177069A CN102251202B CN 102251202 B CN102251202 B CN 102251202B CN 201010177069 A CN201010177069 A CN 201010177069A CN 102251202 B CN102251202 B CN 102251202B
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- 239000011248 coating agent Substances 0.000 title claims abstract description 46
- 238000000576 coating method Methods 0.000 title claims abstract description 46
- 238000005516 engineering process Methods 0.000 title claims abstract description 28
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 52
- 230000008569 process Effects 0.000 claims abstract description 46
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000004411 aluminium Substances 0.000 claims abstract description 18
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 18
- 239000010703 silicon Substances 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 16
- 238000002161 passivation Methods 0.000 claims abstract description 12
- 239000007769 metal material Substances 0.000 claims abstract description 7
- 238000007747 plating Methods 0.000 claims description 156
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 36
- 238000004140 cleaning Methods 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 23
- 238000002203 pretreatment Methods 0.000 claims description 23
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 20
- 238000005238 degreasing Methods 0.000 claims description 19
- 239000002253 acid Substances 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000002019 doping agent Substances 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000011780 sodium chloride Substances 0.000 claims description 11
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 10
- 239000012153 distilled water Substances 0.000 claims description 10
- 229910017604 nitric acid Inorganic materials 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 238000004381 surface treatment Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 235000019353 potassium silicate Nutrition 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 239000001488 sodium phosphate Substances 0.000 claims description 5
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 5
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 4
- 229940089027 kcl-40 Drugs 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000002604 ultrasonography Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 17
- 238000005260 corrosion Methods 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000013535 sea water Substances 0.000 abstract description 6
- 238000003618 dip coating Methods 0.000 abstract 3
- 239000012752 auxiliary agent Substances 0.000 abstract 1
- 239000011247 coating layer Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 20
- 238000012545 processing Methods 0.000 description 12
- 229910000926 A-3 tool steel Inorganic materials 0.000 description 8
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 238000011112 process operation Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005269 aluminizing Methods 0.000 description 3
- 238000000280 densification Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011179 visual inspection Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000006735 epoxidation reaction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 150000002927 oxygen compounds Chemical class 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 238000005275 alloying Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000007716 flux method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- 150000003376 silicon Chemical class 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
Abstract
The invention provides a hot dip aluminum-silicon coating technology and a use thereof. The technology comprises the following steps of acquiring a workpiece needing to be coated, carrying out pretreatment on the workpiece needing to be coated, putting the pretreated workpiece into a coating auxiliary agent to carry out a coating auxiliary process, putting the workpiece treated by the coating auxiliary process into hot coating solution to carry out a hot-dip coating process, and carrying out passivation treatment on the workpiece treated by the hot-dip coating process, wherein the hot coating solution comprises: by weight, 4 to 10% of molten silicon and 96 to 90% of molten liquid aluminium, and the surface of the hot coating solution is added with surface covering agents of hot coating solution. The hot dip aluminum-silicon coating technology has simple processes, is suitable for industrialized production, can prepare a coated workpiece with good seawater corrosion resistant performances, realizes a high degree of combination of a workpiece needing to be coated and a coating layer, is suitable for hot dip coating treatment on the surface of a metal material, and is especially suitable for treatment on the surface of a housing of an illuminating device utilized in an ocean environment.
Description
Technical field
The invention belongs to hot dip technical field, be specifically related to adopt a kind of hot dip aluminum-silicon coating technology and application.
Background technology
When the materials such as the industrial lamp outer casing of commonly using are now applied in atmospheric marine environment, be very easily corroded.This is because ocean environment is a kind of corrosive environment of complexity.In this environment, seawater itself is a kind of strong corrosive medium, and ripple, wave, tide, stream produce low frequency toward combined stress and impact, all to the direct or indirect booster action of corrosion induced to hardware again simultaneously.This not only seriously affects the outward appearance of product, but also has weakened the mechanical property of material, causes serious financial loss.Therefore, under normal circumstances, take the mode that applies protective coating on its surface to protect.But adopting aforesaid method when protection, in a lot of situations, the sticking power of coating is bad, and needs daily monitoring and maintenance workload large.
At present, hot dipping aluminium plating technology is a lot, but technique is all more complicated.Use more improved Sendzimir method, its plating piece must be isolated with protection gas and air, and therefore whole flow process is all airtight, and protect gas often to change, and it is more difficult that this just makes this process implementing get up, and production cost is very high.And till the present, also there is not carrying out for the metallic substance in marine atmosphere Working environment the prior art of hot dip aluminum-silicon coating technology design.
Summary of the invention
In view of this, the invention provides a kind of corrosion-resistant, simple to operate, hot dip aluminum-silicon coating technology of being suitable for suitability for industrialized production, the plating piece sea water corrosion resistant of applying this art breading is good, and plating piece and coat binding strength are high.
And, provide above-mentioned hot dip aluminum-silicon coating technology for the surface treatment to the metallic substance using at atmospheric marine environment.
The present invention solves the problems of the technologies described above adopted technical scheme:
A kind of hot dip aluminum-silicon coating technology, comprises following steps:
Obtain plating piece;
Plating piece is carried out to pre-treatment;
Pretreated plating piece is put into plating assistant agent and help plating;
Carry out hot dip process by helping plating piece after plating to put into hot dip liquid;
Plating piece after hot dip process is carried out to Passivation Treatment;
The component that described hot dip liquid comprises is by weight percentage: the silicon 4～10% of molten state, the aluminium liquid 96～90% of molten state.
And, a kind of by this hot dip aluminum-silicon coating technology for surface treatment to the metallic substance using at ocean environment.
Above-mentioned materials hot dip aluminum-silicon coating technology is by carrying out the plating piece of wanted hot dip to help plating, hot dip process and Passivation Treatment after pre-treatment, operation is simple, in each step, will in corresponding plating piece submergence treatment solution, process, and temperature, time are easy to control, therefore this process operations is convenient, easy to control, improve production efficiency, be suitable for suitability for industrialized production; Owing to having selected the suitable plating operation that helps, form complete and imporous protective membrane on plating piece surface, effectively prevent that pretreated plating piece is oxidized; Select appropriate thermal plating solution, in aluminium liquid, add appropriate silicon, effectively improve hot dip liquid mobility and coating fragility, reduce hot dip temperature, improve the ability of plating piece secondary processing, and then make plating piece possess sea water corrosion resistant and resistance to elevated temperatures, extend the work-ing life of plating piece in marine atmosphere Working environment, applicable to various metal material surfaces are carried out to hot dip process processing.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
A kind of hot dip aluminum-silicon coating technology that the embodiment of the present invention provides, comprises following steps:
Obtain plating piece;
Plating piece is carried out to pre-treatment;
Pretreated plating piece is put into plating assistant agent and help plating;
Carry out hot dip process by helping plating piece after plating to put into hot dip liquid;
Plating piece after hot dip process is carried out to Passivation Treatment;
The component that described hot dip liquid comprises is by weight percentage: the silicon 4～10% of molten state, the aluminium liquid 96～90% of molten state.
Above-mentioned pre-treatment comprises oil removing and rust cleaning step, described deoiling step comprises following process: preferably plating piece is placed in and contains the degreasing fluid that 20～50g/L sodium hydroxide, 30～50g/L sodium carbonate, 20～40g/L sodium phosphate, 3～6g/L water glass, solvent are water, at 60～90 DEG C of temperature, soak, clean plating piece, then adopt clear water to remove degreasing fluid.This plating piece treatment time in degreasing fluid is determined according to plating piece surface and oil contaminant situation, common 5～15min can thoroughly remove degreasing, can be according to practical situation, time that can proper extension processing when greasy dirt is many, accordingly, greasy dirt just can reduce the treatment time when few flexibly, but finally should be by greasy dirt full scale clearance.After oil removal, can further clean plating piece with clear water, thereby remove the degreasing fluid of plating piece remained on surface completely.Clear water temperature when application clear water cleans plating piece preferably adopts the warm water of 20～50 DEG C or the high-temperature water of 60～90 DEG C.
Described deoiling step comprises following process: preferably the plating piece after oil removing is placed in and contains 3～15% hydrochloric acid, soak rust cleaning in the rust removing solution that 0.5～1.5% inhibiter, solvent are water, clean and remove rust removing solution afterwards, for example, wash away rust removing solution with clear water.Wherein, inhibiter preferably but be not limited only to urotropine, the iron rust of plating piece Surface Creation can be effectively dissolved in acid in rust remover, inhibiter particularly urotropine can effectively prevent that hydrochloric acid from producing corrosion to metal, this rust removing solution uses at normal temperatures, can remove medium or serious corrosion, treatment time is preferably 5～15min, can be according to practical situation, time that can proper extension processing when corrosion is serious, accordingly, corrosion just can reduce the treatment time when relatively light flexibly, but finally should be by corrosion full scale clearance.After rust cleaning finishes, should carry out strict cleaning to plating piece immediately, to remove the acid solution on plating piece surface completely, prevent the corrosion of acid solution to plating piece.
Above-mentioned help plating be by carry out pretreated plating piece be placed in plating assistant agent help plating process, described plating assistant agent is that mass concentration is more than or equal to 10% K
2zrF
6solution.This temperature that helps plating to process is preferably 80～95 DEG C, and the time is preferably 1～4 minute.This help plating to process to help plating is one vital operation during flux method is aluminized, and plating assistant agent selects whether to be suitably directly connected to the quality of quality of coating.And in the embodiment of the present invention, select suitable plating assistant agent; in the time of hot dip process, very easily remove from plating piece surface; micro amount of oxygen compound on plating piece is had to fabulous absorption solvency action; strengthen the infiltration of aluminium liquid to plating piece; and to plating bath pollution-free; therefore, form complete and imporous protective membrane on plating piece surface, effectively prevented that pretreated plating piece is oxidized.
Above-mentioned hot dip processing is that the coating bath that fills hot dip liquid through helping plating plating piece after treatment to be placed in is carried out to hot dip process, the temperature of hot dip process is preferably 650～720 DEG C, time is preferably 5～10 minutes, the temperature of hot dip process can not be too high or too low, temperature is too low, as lower than 650 DEG C, can cause fully melting of aluminium, thereby cause the problems such as the plating leakage of plating piece; When excess Temperature, as be greater than 720 DEG C, although the hot dip process operation of this step can be carried out as usual, can increase hot dip process process operations difficulty, can not control timely plating piece, and the evaporation of aluminium liquid is large, affect the quality of coating of plating piece, and excess Temperature, the production cost that plating piece coating forms increased, draw through experiment, temperature is advisable at 650～720 DEG C.The time of hot dip process is unsuitable too short, too short words, can cause plating piece thickness of coating too low, the bonding strength that reduces coating and plating piece matrix, overlong time, although can well increase the bonding strength of thickness of coating and coating and plating piece matrix, but can cause coating blocked up, thereby increase unnecessary production cost, draw through experiment, the time is to be advisable for 5～10 minutes.The silicon 4～10% that this hot dip liquid comprises molten state by weight percentage, the aluminium liquid that all the other are molten state, this silicon is preferably industrial pure silicon, and aluminium liquid is liquid aluminium, is preferably commercial-purity aluminium liquid.
Also add hot dip liquid surface dopant surface flux on the surface of this hot dip liquid, this hot dip liquid surface dopant is KCl, NaCl, NaAlF
6mixture, described KCl, NaCl and NaAlF
6weight percentage be: KCl 40～60%, NaCl 30～50%, NaAlF
610～20%, the minimum dosage of hot dip liquid surface dopant should ensure that this hot dip liquid surface dopant all covers hot dip liquid, certainly can increase according to practical situation the consumption of hot dip liquid surface dopant, the tectal thickness forming to increase its hot dip liquid surface dopant.
Above-mentioned Passivation Treatment is by after cooling the plating piece after hot dip process, plating piece is placed in to acid solution and adopts ultrasonic vibrating machine to vibrate 5～15 minutes, more preferably 5 minutes.The object of this Passivation Treatment is to make the coating on plating piece surface form continuous, fine and close passive film, improves the corrosion resistance nature of plating piece, finally cleans sample surfaces with a large amount of clear water again.
Described acid solution comprises nitric acid, phosphoric acid, distilled water, and the volume ratio of described nitric acid, phosphoric acid, distilled water is preferably 1: 1: 10～and 20, more preferably 1: 1: 20.
Above-mentioned plating piece is preferably the case material of the device of applying in ocean environment, especially the case material of illuminating device.
Above-mentioned hot dip aluminum-silicon coating technology is by carrying out the plating piece of wanted hot dip to help plating, hot dip process and Passivation Treatment after pre-treatment, operation is simple, in each step, will in corresponding plating piece submergence treatment solution, process, and temperature, time are easy to control, therefore this process operations is convenient, easy to control, improve production efficiency, be suitable for suitability for industrialized production; Owing to having selected the suitable plating operation that helps, form complete and imporous protective membrane on plating piece surface, effectively prevent that pretreated plating piece is oxidized, select suitable plating assistant agent, in the time of hot dip process, very easily remove from plating piece surface, the micro amount of oxygen compound on plating piece is had to fabulous absorption solvency action, and to plating bath pollution-free, therefore, form complete and imporous protective membrane on plating piece surface, effectively prevented that pretreated plating piece is oxidized; Select appropriate thermal plating solution, add appropriate silicon, effectively improve hot dip liquid mobility and coating fragility, reduce hot dip temperature, improve the ability of this plating piece secondary processing; The hot dip liquid surface dopant adding on hot dip liquid surface, has effectively protected hot dip liquid not oxidized, thereby has made plating solution reusable, thereby reduced production cost.By the steel coating densification of this art breading, evenly, alloying layer thickness is dark, and then makes material possess sea water corrosion resistant and resistance to elevated temperatures, the sea-water corrosion under can high temperature resistant environment, has extended the work-ing life of this material in marine atmosphere Working environment.
Just because of utilizing the prepared plating piece of above-mentioned hot dip aluminum-silicon coating technology to there is above-mentioned excellent properties, therefore utilize this hot dipping aluminium plating technology to can be used for surface treatment, the especially surface treatment to illuminating device case material of the metallic substance to using in ocean environment.
Illustrate the aspect such as hot dip aluminum-silicon coating technology and application performance by multiple embodiment below.
Embodiment 1
A3 steel matter surface heat dip calorizing-silicon:
Obtain A3 steel plate, its pretreatment procedure is: the pre-treatment such as oil removing (degreasing), cleaning, rust cleaning, cleaning, and help that plating is processed etc.
1. oil removing pre-treatment: the degreasing fluid that plating piece is placed in to 80 DEG C carries out oil removing pre-treatment, this degreasing fluid formula is 35g/L sodium hydroxide, 40g/L sodium carbonate, 40g/L sodium phosphate, 5g/L water glass, Yu Weishui, 10 minutes treatment times, deoiling effect visual inspection, after oil removing, clean immediately, clean the high-temperature water that adopts 85 DEG C, remove the degreasing fluid on plating piece surface;
2. rust cleaning pre-treatment: at room temperature, it is 5min that plating piece after oil removing is placed in to the rust removing solution pre-treatment that eliminates rust, this rust removal liquid formula is that 15% hydrochloric acid, 0.5% urotropine, surplus are water, should carry out immediately strict cleaning to remove the acid solution on plating piece surface after rust cleaning finishes;
3. help plating to process: it is that the plating assistant agent of 90 DEG C helps plating 3min that the plating piece after rust cleaning is placed in to temperature, and this plating assistant agent is that mass concentration is 20% K
2zrF
6solution;
4. hot dip process processing: the groove of aluminizing that plating piece after helping plating is placed in to the hot dip liquid that fills 700 DEG C soaks and crosses 5 minutes, the commercial-purity aluminium 96% that this hot dip liquid formula is molten state, the industrial pure silicon 4% of molten state, and both mix; Also add hot dip liquid surface dopant on the surface of described hot dip liquid, this hot dip liquid surface dopant is KCl, NaCl, NaAlF
6mixture, the mass percent of each component is KCl 55%, NaCl 35% and NaAlF
610%;
5. Passivation Treatment: after cooling the plating piece after hot dip process, plating piece is placed in to acid solution and adopts the vibration of ultrasonic vibrating machine to take out after 5 minutes, described acid solution comprises nitric acid, phosphoric acid, distilled water, and the volume of this nitric acid, phosphoric acid, distilled water is preferably than being 1: 1: 20.
To at 800 DEG C, carry out epoxidation experiments to judge its high temperature corrosion resistance by above-mentioned this plating piece after treatment, result shows: A3 steel high temperature oxidation corrosion resistance performance after immersion plating is processed is obviously better than the A3 steel without immersion plating processing, can partly replace stainless steel.
Embodiment 2
A3 steel surface hot dip aluminum plating-silicon:
Obtain A3 steel, its pretreatment procedure is: the pre-treatment such as oil removing (degreasing), cleaning, rust cleaning, cleaning, and help that plating is processed etc.
1. oil removing pre-treatment: the degreasing fluid that plating piece is placed in to 90 DEG C carries out oil removing pre-treatment, this degreasing fluid formula is 20g/L sodium hydroxide, 30g/L sodium carbonate, 30g/L sodium phosphate, 6g/L water glass, Yu Weishui, 5 minutes treatment times, deoiling effect visual inspection, after oil removing, clean immediately, clean the high-temperature water that adopts 60 DEG C, object is to remove the degreasing fluid on plating piece surface;
2. rust cleaning pre-treatment: it is 15min that the plating piece after oil removing is placed in to the rust removing solution pre-treatment that eliminates rust, this rust removal liquid formula is that 3% hydrochloric acid, 0.8% urotropine, surplus are water, should carry out immediately strict cleaning to remove the acid solution on plating piece surface after rust cleaning finishes;
3. help plating to process: it is that the plating assistant agent of 95 DEG C helps plating 4min that the plating piece after rust cleaning is placed in to temperature, and this plating assistant agent is that mass concentration is 10% K
2zrF
6solution;
4. hot dip process processing: the groove of aluminizing that plating piece after helping plating is placed in to the hot dip liquid that fills 720 DEG C soaks and crosses 5 minutes, hot dip liquid formula is this hot dip liquid formula commercial-purity aluminium 94% that is molten state, the industrial pure silicon 6% of molten state, and both mix; Also add hot dip liquid surface dopant on the surface of described hot dip liquid, this hot dip liquid surface dopant is KCl, NaCl, NaAlF
6mixture, the mass percent of each component is KCl 40%, NaCl 45% and NaAlF
615%;
5. Passivation Treatment: after cooling the plating piece after hot dip process, plating piece is placed in to acid solution and adopts the vibration of ultrasonic vibrating machine to take out after 5 minutes, described acid solution comprises nitric acid, phosphoric acid, distilled water, and the volume of this nitric acid, phosphoric acid, distilled water is preferably than being 1: 1: 10.
Coating is smooth, densification is even and the interpolation of silicon has increased the mobility of aluminium liquid.
Embodiment 3
A3 steel surface hot dip aluminum plating-silicon:
Obtain A3 steel, its pretreatment procedure is: the pre-treatment such as oil removing (degreasing), cleaning, rust cleaning, cleaning, and help that plating is processed etc.
1. oil removing pre-treatment: the degreasing fluid that plating piece is placed in to 60 DEG C carries out oil removing pre-treatment, this degreasing fluid formula is 50g/L sodium hydroxide, 50g/L sodium carbonate, 20g/L sodium phosphate, 3g/L water glass, Yu Weishui, 15 minutes treatment times, deoiling effect visual inspection, after oil removing, clean immediately, cleaning can adopt the high-temperature water of normal-temperature water or 90 DEG C, and object is to remove the degreasing fluid on plating piece surface;
2. rust cleaning pre-treatment: it is 10min that the plating piece after oil removing is placed in to the rust removing solution pre-treatment that eliminates rust, this rust removal liquid formula is that 9% hydrochloric acid, 1.0% urotropine, surplus are water, should carry out immediately strict cleaning to remove the acid solution on plating piece surface after rust cleaning finishes;
3. help plating to process: it is that the plating assistant agent of 80 DEG C helps plating 1.5min that the plating piece after rust cleaning is placed in to temperature, and then dry, this plating assistant agent is the K that mass concentration is greater than 20%
2zrF
6solution;
4. hot dip process processing: the groove of aluminizing that plating piece after helping plating is placed in to the hot dip liquid that fills 690 DEG C soaks and crosses 8 minutes, hot dip liquid formula is this hot dip liquid formula commercial-purity aluminium 92% that is molten state, the industrial pure silicon 8% of molten state, and both mix; Also add hot dip liquid surface dopant on the surface of described hot dip liquid, this hot dip liquid surface dopant is KCl, NaCl, NaAlF
6mixture, the mass percent of each component is KCl 60%, NaCl 30% and NaAlF
610%;
5. Passivation Treatment: after cooling the plating piece after hot dip process, plating piece is placed in to acid solution and adopts the vibration of ultrasonic vibrating machine to take out after 5 minutes, described acid solution comprises nitric acid, phosphoric acid, distilled water, and the volume of this nitric acid, phosphoric acid, distilled water is preferably than being 1: 1: 20.
Coating is smooth, densification is even and the interpolation of silicon can reduce immersion plating temperature.
Embodiment 4
1Cr13 stainless steel surface heat dip calorizing-silicon:
According to above-described embodiment 1 technical process and processing condition, 1Cr13 stainless steel surface is carried out: hot-water soak → oil removing → cleaning → rust cleaning → cleaning → help plating processing → oven dry → hot dip process, stainless steel is carried out to then Hot-dip aluminum-silicon of surface treatment.Then carry out 900 DEG C of epoxidation experiments, its performance is better than not immersion plating part, and its depth of corrosion R < 0.1mm/a, possesses complete antioxidant anticorrosive performance.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a hot dip aluminum-silicon coating technology, comprises following steps:
Obtain plating piece;
Plating piece is carried out to pre-treatment;
Pretreated plating piece is put into plating assistant agent and help plating;
Carry out hot dip process by helping plating piece after plating to put into hot dip liquid;
Plating piece after hot dip process is carried out to Passivation Treatment;
The component that described hot dip liquid comprises is by weight percentage: the silicon 4～10% of molten state, the aluminium liquid 96～90% of molten state;
The temperature of described hot dip process is 690～720 DEG C, and the time is 5～10 minutes,
Wherein, also add hot dip liquid surface dopant on the surface of described hot dip liquid, described plating piece is steel plating piece.
2. hot dip aluminum-silicon coating technology as claimed in claim 1, is characterized in that: described hot dip liquid surface dopant is KCl, NaCl, NaAlF
6mixture, described KCl, NaCl and NaAlF
6weight percent as follows:
KCl40～60%；
NaCl30～50%；
NaAlF
610～20%。
3. hot dip aluminum-silicon coating technology as claimed in claim 1, is characterized in that: described plating assistant agent is that mass concentration is more than or equal to 10% K
2zrF
6solution;
The described temperature that helps plating is 80～95 DEG C, and the time is 1～4 minute.
4. hot dip aluminum-silicon coating technology as claimed in claim 1, is characterized in that: described Passivation Treatment is by after cooling the plating piece after hot dip process, plating piece is placed in to acid solution and adopts ultrasound vibration 5～15 minutes;
Described acid solution comprises nitric acid, phosphoric acid, distilled water, and the volume ratio of described nitric acid, phosphoric acid, distilled water is 1:1:10～20.
5. hot dip aluminum-silicon coating technology as claimed in claim 1, it is characterized in that: described pre-treatment comprises deoiling step, described deoiling step comprises following process: plating piece is placed in and contains the degreasing fluid that 20～50g/L sodium hydroxide, 30～50g/L sodium carbonate, 20～40g/L sodium phosphate, 3～6g/L water glass, solvent are water, at 60～90 DEG C of temperature, soak, clean plating piece, then clean and remove degreasing fluid.
6. hot dip aluminum-silicon coating technology as claimed in claim 1, it is characterized in that: described pre-treatment comprises rust cleaning step, described rust cleaning step comprises following process: plating piece is placed in and contains 3～15% hydrochloric acid, in the rust removing solution that 0.5～1.5% inhibiter, solvent are water, soak rust cleaning, clean and remove rust removing solution afterwards.
7. hot dip aluminum-silicon coating technology as claimed in claim 1, is characterized in that: described plating piece is the case material of the illuminating device applied in atmospheric marine environment.
8. one kind is used for the surface treatment to the metallic substance using at atmospheric marine environment according to the hot dip aluminum-silicon coating technology described in claim 1 to 7 any one.
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| CN101045980A (en) * | 2007-04-23 | 2007-10-03 | 刘国林 | High aluminium zinc alloy hot dip coating process for iron steel product |
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| CN101045980A (en) * | 2007-04-23 | 2007-10-03 | 刘国林 | High aluminium zinc alloy hot dip coating process for iron steel product |
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| Title |
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| "熔剂法热浸镀铝工艺研究现状及发展";王光文等;《表面技术》;20081031;第37卷(第5期);75-78 * |
| 王光文等."熔剂法热浸镀铝工艺研究现状及发展".《表面技术》.2008,第37卷(第5期),75-78. * |
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