CN1134988A - Method for reparing coating enamel - Google Patents
Method for reparing coating enamel Download PDFInfo
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- CN1134988A CN1134988A CN95110750A CN95110750A CN1134988A CN 1134988 A CN1134988 A CN 1134988A CN 95110750 A CN95110750 A CN 95110750A CN 95110750 A CN95110750 A CN 95110750A CN 1134988 A CN1134988 A CN 1134988A
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- coating
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Abstract
This repairing method is composed of heat and make the enamel layer to be repaired and its surrounding enamel coating rough, flame spray corrosion resistant metal on the bottom layer, flame spray on oxide ceramic coating, then coat with heat-resisting and corrosion resisting thermoplastic resin, finally. use flame-spraying gun to heat the coated thermoplastic resin layer directly to plasticize. Advantages include simple equipment, energy saving, quick repairing and good junction strength,
Description
The invention belongs to the repairing field of enamel coating.
Enamel has the superior corrosion resistance energy, and therefore, enamel is widely used as industry reactors such as chemical industry, medicine, agricultural chemicals, food, the supercoat of equipment such as agitator.But enamel coating is easy to generate damages such as burst porcelain in transportation in installation and the use, thereby loses the provide protection to matrix, causes matrix corrosion, and corrosion product can pollute the product of being produced, and during seriously corroded, even makes the matrix corrosion perforation, equipment scrapping.
Ward off time method for repairing and mending and can be summarized as two classes.
1. body is repaired
At enamel damaged location enamel firing enamel coating, be enamel equipment factory method for repairing and mending commonly used, but integral body is advanced the kiln enamel firing, during energy charge, often needs to repair enamel firing repeatedly, influences enamel coating quality and work-ing life.CN1078753 (application number 92108431.5) has narrated a kind of local enamel firing patching, but has equipment, complex process equally, and the problem that the patch work amount is big can not field patch.
2. allosome is repaired
Organic and inorganic clay sealing is a field patch method commonly used, solidifies (plasticizing) condition owing to be difficult to satisfy required heat tracing, has limited the material range of choice, causes the repair layer heatproof, and corrosion resistance nature is not good, and is bad with matrix bond.
Development in recent years the thermal Sperayed Ceramic Coatings patching, stupalith and enamel material physicochemical property are basic identical, thereby be a kind of ideal patching material, but thermal Sperayed Ceramic Coatings exists 5～10% hole to seal, and makes this method for repairing and mending be subjected to encapsulant performance and condition of cure restriction.Increase thickness of ceramic coating,, can reduce coating and substrate combinating strength, cause repair layer to come off though can reduce and eliminate through hole.Narrated the method that the poly-fluoro-resin of a kind of usefulness is made encapsulant as CN1061628 (application number 91111003.8), but need enamel equipment is sent in the process furnace, or at enamel equipment internal rotation well heater, plastics processing is carried out in sealing then, and each layer all needs to be incubated 40-90 minute down at 360-400 ℃.
The purpose of this invention is to provide a kind of enamel thermospray pottery allosome method for repairing and mending that is used for, provide a kind of method that on thermal Sperayed Ceramic Coatings, applies and plastify fast heatproof, corrosion-resistant thermoplastic resin material, to remedy the deficiency of existing enamel method for repairing and mending.
The method for repairing and mending of a kind of enamel coating of the present invention, its running comprises that cleaning also texturing waits to repair position matrix and enamel coating on every side thereof, the flame plating corrosion resistant metal is in conjunction with bottom, the flame plating oxide ceramic coating, apply heatproof, corrosion-resistant thermoplastic resin material, and heating plasticizing, it is characterized in that adopting the coated thermoplastic resin material of the direct local heating of flame spray gun flame surface, heat-blocking action by the flame-sprayed ceramics coating of its underpart, make thermoplastic resin material reach fusing point and plasticization temperature rapidly and plastify film forming, and progressively transition makes whole coat plasticizings, as required, can apply---plasticizing is repeatedly.
Details are as follows for method for reparing coating enamel operation steps of the present invention.
1. clean
Wait to repair position matrix and enamel coating on every side thereof (bored a hole should first repair welding) with solvent cleaning.
2. rust cleaning texturing
Remove corrosion product with sand paper, wire brush and blasting by abrasives, make and wait to repair position and enamel coating surface texturing on every side thereof,, preferably select the low abrasive materials such as corundum of percentage of damage to carry out the dust-free blasting processing to strengthen combining of repair layer and matrix.
3. the flame plating corrosion resistant metal is in conjunction with bottom
According to matrix and coating damage degree, whether decision sprays corrosion resistant metal in conjunction with bottom, and corrosion resistant metal can be nickel-base alloy, molybdenum, nickel alclad (aluminium nickel coat), and nichrome and stainless steel etc., these materials can be powder, silk material and flexible filaments material.
4. flame plating oxide ceramic coating
Ceramic coating has a very important role in the methods of the invention.The flame plating oxide ceramic material is aluminum oxide, ferric oxide, chromic oxide, zirconium white, silicon oxide, magnesium oxide and composition thereof, its physicochemical property and enamel material are basic identical, it is ideal enamel patching material, except making main patch work layer, the flame plating oxide ceramic layer still subsequently the thermoplastic resin material coating in conjunction with bottom and heat insulating coat, utilize the stupalith thermal conductivity low, the slow heat-blocking action that conducts heat makes follow-up thermoplastic resin material plastify film forming rapidly.The flame plating oxide ceramic material can be a powder, bar material and flexible cord parcel silk material.
5. coated thermoplastic coating
On the flame-sprayed ceramics coating, apply heatproof, corrosion-resistant thermoplastic resin such as penton, polyphenylene sulfide, polyphenylene oxide, tetrafluoroethylene (F4), poly-trichlorine vinyl fluoride (F3), perfluoroethylene-propylene (F46), and/or its mixture adds an amount of filler such as frit for porcelain enamel and pigment.
6. plasticizing
With spray gun gas flame such as oxygen---the direct local heating thermoplastic resin of acetylene torch coat surface, heat-blocking action by its lower floor's ceramic coating, make thermoplastic resin material reach fusing point or plasticization temperature rapidly and plastify film forming, and progressively transition makes whole coat plasticizings, as required, can apply---plasticizing is repeatedly.
The inventive method has following advantage
1. simple, the energy-and time-economizing of equipment, repairing speed is fast.
The inventive method does not need enamel equipment is sent into process furnace and used other complicated heating installation.Flame plating and plasticizing are all finished with flame spray gun, and by the heat-blocking action of ceramic coating, the thermoplastic resin coat are plastified fast, have reduced energy consumption, and patch work only needs can finish in about one hour usually.Be particularly suitable for the on-the-spot repairing fast of enamel equipment.
2. repair layer and matrix bond are good
Flame plating metal and ceramic coating and matrix stretching bonding strength be greater than 6MPa, and the hole of distinctive condition of surface of thermally sprayed coating and existence has increased combining of thermoplastic resin coating and matrix, reduced the cracking of coating and come off.
3. repair coating heatproof, fine corrosion resistance.
The present invention has prevented effectively that by the acting in conjunction of several coatings corrosive medium from corroding matrix, and the repair coating performance is better than other repair coating.
4. purposes is wide
Except repairing the various enamel equipments, method of the present invention also can be used for the repairing and the manufacturing of thermoplastic resin such as polyphenylene sulfide, tetrafluoroethylene (F4) coating.
Embodiment 1, wait to repair the position with the acetone cleaning and reach enamel coating on every side, with powder flame-thrower spray aluminum oxide+40% ferric oxide mix powder (＜180 order), with varnish spray gun spraying polyphenylene sulfide suspension, plastify the polyphenylene sulfide coat fast with powder flame-thrower flame, repetitive coatings---plastify three times, promptly finish repairing.
Embodiment 2, wait to repair the position with the acetone cleaning and reach enamel coating on every side, powder flame-thrower spraying molybdenum matrix powder is done in conjunction with bottom, flame spray powder coating aluminum oxide-3% titania mixture powder (＜180 order), the polyphenylene sulfide suspension that contains 20% cover-coat enamel with the varnish spray gun spraying, be coated with poly-this thioether of powder flame-thrower flame plasticizing and be subjected to layer, repetitive coatings---plastify three times, promptly finish repairing.
Claims (2)
1. ward off the method for repairing and mending of throwing off restraint coating for one kind, its operation steps comprises that cleaning also texturing waits to repair position matrix and enamel coating on every side thereof, the flame plating corrosion resistant metal is in conjunction with bottom, the flame plating oxide ceramic coating, apply heatproof, corrosion-resistant thermoplastic resin material, and heating plasticizing, it is characterized in that adopting the coated thermoplastic resin material of the direct local heating of flame spray gun flame surface, heat-blocking action by the flame-sprayed ceramics coating of its lower floor, make thermoplastic resin material reach fusing point and plasticization temperature rapidly and plastify film forming, and progressively transition makes whole coat plasticizings, as required, can apply---plasticizing is repeatedly.
2. method for reparing coating enamel according to claim 1, it is characterized in that the heatproof that is applied, corrosion-resistant thermoplastic resin material are by penton, polyphenylene sulfide, polyphenylene oxide, tetrafluoroethylene (F4), poly-trichlorine vinyl fluoride (F3), perfluoroethylene-propylene (F46), and/or its mixture adds an amount of filler such as frit for porcelain enamel and pigment composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95110750A CN1134988A (en) | 1995-05-04 | 1995-05-04 | Method for reparing coating enamel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95110750A CN1134988A (en) | 1995-05-04 | 1995-05-04 | Method for reparing coating enamel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1134988A true CN1134988A (en) | 1996-11-06 |
Family
ID=5078098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95110750A Pending CN1134988A (en) | 1995-05-04 | 1995-05-04 | Method for reparing coating enamel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1134988A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452028A (en) * | 2010-10-24 | 2012-05-16 | 西南交通大学 | Method for repairing ceramic female die |
| CN103170794A (en) * | 2013-03-21 | 2013-06-26 | 安徽淮河化工股份有限公司 | Method of mending damage on non-clamping sleeve portion of enamel reaction kettle |
| CN104937139A (en) * | 2012-11-29 | 2015-09-23 | 搪玻璃技术股份有限公司 | Methods for preparing and repairing chemically-resistant coatings |
| CN113308682A (en) * | 2021-05-26 | 2021-08-27 | 长安大学 | Metal coating structure and preparation method |
-
1995
- 1995-05-04 CN CN95110750A patent/CN1134988A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452028A (en) * | 2010-10-24 | 2012-05-16 | 西南交通大学 | Method for repairing ceramic female die |
| CN104937139A (en) * | 2012-11-29 | 2015-09-23 | 搪玻璃技术股份有限公司 | Methods for preparing and repairing chemically-resistant coatings |
| CN103170794A (en) * | 2013-03-21 | 2013-06-26 | 安徽淮河化工股份有限公司 | Method of mending damage on non-clamping sleeve portion of enamel reaction kettle |
| CN113308682A (en) * | 2021-05-26 | 2021-08-27 | 长安大学 | Metal coating structure and preparation method |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |