CN103849863A - Rapid phosphating process for threads - Google Patents
Rapid phosphating process for threads Download PDFInfo
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- CN103849863A CN103849863A CN201410124896.4A CN201410124896A CN103849863A CN 103849863 A CN103849863 A CN 103849863A CN 201410124896 A CN201410124896 A CN 201410124896A CN 103849863 A CN103849863 A CN 103849863A
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Abstract
The invention discloses a rapid phosphating process for threads. The rapid phosphating process comprises the two steps of phosphating liquor preparation and phosphating, wherein the phosphating liquor is firstly prepared according to a proportion, then a threaded workpiece of which the threaded surface is uniformly coated with phosphating liquor is placed into a roasting room for heating and roasting, and finally phosphating residues on the threaded surface are removed to complete rapid phosphating of threads. The rapid phosphating process for threads can solve a problem that phosphating is needed to be carried out on threads of a threaded workpiece under the condition that conditions are deficient and time is urgent, and achieves maximal sealable pressure of 155MPa for a tube thread pressure test on the premise that strength is ensured; compared with the regular phosphating process, the rapid phosphating process disclosed by the invention is simple in process, short in phosphating time, more economical and strong in feasibility; most importantly, phosphating effect is reliable.
Description
Technical field
The present invention relates to the screw thread phosphate field of whorl work piece, be specifically related to the screw thread quick phosphorization process of the whorl work piece in oil (gas) well head industry and other machinery industry.
Background technology
Screw thread phosphate is the meagre phosphatize phosphate coat that generates one deck even compact in thread surface, can effectively improve contact conditions and the force-bearing situation of thread surface, improves the lubricant effect of connecting thread, strengthens that it is antirust, anti-attrition and sticky thread resistance energy.
Conventional screw thread phosphate technique comprises steam phosphating and two kinds of methods of cold phosphatization at present.Steam phosphating technique is: pickling → alkali cleaning → phosphatization (immersion) → clear water cleans, and Phosphating Solution remains on 80 ℃～98 ℃, and phosphating time is 20～30 minutes, but complex process, the only bonderizing of applicable short workpieces.Cold phosphorization technology is first prepared phosphatization cream, according to first and second liang of liquid of formula rate preparation, pouring second liquid into first liquid stirs, add the talcum powder of corresponding proportion, be mixed with phosphatization cream, then phosphatization cream be evenly applied on the screw thread after rust cleaning, under normal temperature, keep after 3～4h, remove again the phosphatization cream of thread surface, coat slushing oil.This technique required time is long, and from preparation phosphatization cream to last painting slushing oil, complete a complete set of operation and approximately need 6h, inefficiency, production cost is higher.
In (gas) process of oil recovery, sleeve pipe, oil pipe and the pipe nipple etc. of wellhead equipment are generally threaded connection, so screw thread phosphate is most important for the sealing of well head.But well head is often seated in remoter place, there is no phosphatization or phosphatization screw thread not in place for some, can there is a kind of convenient, quick, economic, reliable phosphatization mode most important for sealing and the well head safe of well head.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of screw thread quick phosphorization process, can solve in condition scarcity, need the screw thread of double thread workpiece to carry out the problem of phosphatization it is pressed for time in the situation that, can guarantee the effect of screw thread phosphate, also can save greatly phosphatization cost.
The present invention is achieved through the following technical solutions:
Screw thread quick phosphorization process, comprises the following steps:
By volume, first get 15～20% mass concentration and be more than 98% nitric acid as in container, the phosphoric acid of then getting 25～30% mass concentrations and being and be more than 85% is slowly poured container into and constantly stirs, and fully mixes and makes mixed solution I with nitric acid; Get after 3～6% calcium carbonate and 25～30% zinc oxide mix again and pour in mixed solution I, the process of pouring into constantly stirs and makes mixed solution II; Finally surplus talcum powder is poured in mixed solution II, stir until mixed solution present white thick, make Phosphating Solution;
Phosphatization operation:
Whorl work piece is cleaned up and dried, smear equably above-mentioned Phosphating Solution in thread surface, after smearing end, whorl work piece is put in bakery, be warming up to 150～200 ℃, continue baking more than 45 minutes, until the Phosphating Solution of thread surface presents faint yellow solid shape, take out, clean and remove thread surface faint yellow solid, thread surface presents uniform light gray, completes fast bonderizing.
The present invention further improved technical scheme is, described Phosphating Solution preparation raw material by volume, 18% nitric acid, 30% phosphoric acid, 6% calcium carbonate, 30% zinc oxide, 16% talcum powder.
Compared with generally now selling phosphide liquid product, Phosphating Solution of the present invention has strengthened the content of zinc oxide, and (general zinc oxide content is 15-18%, zinc oxide content of the present invention is 25～30%), strengthen zinc element content and be conducive to generate Zn3 (PO4) 2, use calcium carbonate to replace copper carbonate, can generate Ca3 (PO4) 2, the purchase cost of calcium carbonate is more much lower than copper carbonate, and the reaction times is shorter.Now sell simultaneously and in product, also contain hexamethylenetetramine, Sodium Fluoride, distilled water etc.; hexamethyl four ammonia mix with nitric acid can accelerated reaction, but has certain danger, adds Sodium Fluoride and distilled water to play dilution provide protection; product of the present invention, for Oil Field, must be avoided these danger.The formula of fast bonderizing liquor of the present invention has been simplified formulated component, belong to Zinc-calcium series phosphatating liquid, in Phosphating Solution, there is other ions such as Zn2+, Ca2+, NO3-, H2PO4-, finally generate the phosphatize phosphate coat of other compositions such as Zn3 (PO4) 2, Ca3 (PO4) 2, Fe3 (PO4) 2 by chemical reaction at piece surface.
The present invention has increased the speed of phosphatization greatly from three aspects: first, in Phosphating Solution, nitric acid plays promotor effect, uses 98% above high density nitric acid can promote greatly the speed of phosphating reaction; Secondly, use the phosphoric acid of 85% above high density not only can guarantee that Phosphating Solution effective ion quantity in the situation that of given volume is many as much as possible, but also can increase greatly institute's liberated heat in reaction process, thereby improve speed of response; Finally, increase the temperature of external environment by whorl work piece being put in bakery into baking, also Reaction time shorten greatly.
The present invention compared with prior art, has following obvious advantage:
Gas thread alramenting layer after fast bonderizing of the present invention presents grey, evenly fine and close, smooth smooth, phosphatization zero defect.After phosphatization, the maximum salable 155MPa pressure of gas thread pressure testing under the prerequisite of proof strength, and general method for bonderizing reaches as high as 105Mpa, after pressure testing of the present invention, phosphate coating, without any breakage, can carry out pressure seal test repeatedly.And the quick phosphorization process flow process of this gas thread is compared with traditional phosphating solutions technique, operating process is without particular requirement, simpler and more direct, phosphatization effect stability is reliable, it is short that the required time of whole parkerizing process also compares, more be applicable to a small amount of whorl work piece phosphatization of single-piece, feasibility is more intense, more economically material benefit.
Accompanying drawing explanation
Fig. 1 is Phosphating Solution preparation process figure of the present invention.
Embodiment
embodiment 1
Phosphating Solution preparation:
By volume, first get 15% concentration and be 98% nitric acid as in container, then get 30% concentration and be 85% phosphoric acid and slowly pour container into and constantly stir, fully mix and make mixed solution I with nitric acid; Get after 3% calcium carbonate and 30% zinc oxide mix again and pour in mixed solution I, the process of pouring into constantly stirs, and makes mixed solution II; Finally 22% talcum powder is poured in mixed solution II, stir until mixed solution present white thick, make Phosphating Solution (as shown in Figure 1);
Phosphatization operation:
Whorl work piece is cleaned up and dried, smear equably above-mentioned Phosphating Solution in thread surface, after smearing end, whorl work piece is put in bakery, be warming up to 150 ℃, continue baking 1 hour, until the Phosphating Solution of thread surface presents faint yellow solid shape, take out, clean and remove thread surface faint yellow solid, thread surface presents uniform light gray, completes fast bonderizing.
The salable 150MPa pressure of gas thread pressure testing.
embodiment 2
Phosphating Solution preparation:
By volume, first get 20% concentration and be 98% nitric acid as in container, then get 25% concentration and be 85% phosphoric acid and slowly pour container into and constantly stir, fully mix and make mixed solution I with nitric acid; Get after 5% calcium carbonate and 25% zinc oxide mix again and pour in mixed solution I, the process of pouring into constantly stirs, and makes mixed solution II; Finally 25% talcum powder is poured in mixed solution II, stir until mixed solution present white thick, make Phosphating Solution;
Phosphatization operation:
Whorl work piece is cleaned up and dried, smear equably above-mentioned Phosphating Solution in thread surface, after smearing end, whorl work piece is put in bakery, be warming up to 200 ℃, continue baking 45 minutes, until the Phosphating Solution of thread surface presents faint yellow solid shape, take out, clean and remove thread surface faint yellow solid, thread surface presents uniform light gray, completes fast bonderizing.
The salable 140MPa pressure of gas thread pressure testing.
embodiment 2
Phosphating Solution preparation:
By volume, first get 18% concentration and be 98% nitric acid as in container, then get 30% concentration and be 85% phosphoric acid and slowly pour container into and constantly stir, fully mix and make mixed solution I with nitric acid; Get after 6% calcium carbonate and 30% zinc oxide mix again and pour in mixed solution I, the process of pouring into constantly stirs, and makes mixed solution II; Finally 16% talcum powder is poured in mixed solution II, stir until mixed solution present white thick, make Phosphating Solution;
Phosphatization operation:
Whorl work piece is cleaned up and dried, smear equably above-mentioned Phosphating Solution in thread surface, after smearing end, whorl work piece is put in bakery, be warming up to 180 ℃, continue baking 3 hours, until the Phosphating Solution of thread surface presents faint yellow solid shape, take out, clean and remove thread surface faint yellow solid, thread surface presents uniform light gray, completes fast bonderizing.
The salable 155MPa pressure of gas thread pressure testing.
Claims (2)
1. screw thread quick phosphorization process, is characterized in that, comprises the following steps:
Phosphating Solution preparation:
By volume, first get 15～20% mass concentration and be more than 98% nitric acid as in container, the phosphoric acid of then getting 25～30% mass concentrations and being and be more than 85% is slowly poured container into and constantly stirs, and fully mixes and makes mixed solution I with nitric acid; Get after 3～6% calcium carbonate and 25～30% zinc oxide mix again and pour in mixed solution I, the process of pouring into constantly stirs and makes mixed solution II; Finally surplus talcum powder is poured in mixed solution II, stir until mixed solution present white thick, make Phosphating Solution;
Phosphatization operation:
Whorl work piece is cleaned up and dried, smear equably above-mentioned Phosphating Solution in thread surface, after smearing end, whorl work piece is put in bakery, be warming up to 150～200 ℃, continue baking more than 45 minutes, until the Phosphating Solution of thread surface presents faint yellow solid shape, take out, clean and remove thread surface faint yellow solid, thread surface presents uniform light gray, completes fast bonderizing.
2. screw thread quick phosphorization process according to claim 1, is characterized in that: described Phosphating Solution preparation raw material by volume, 18% nitric acid, 30% phosphoric acid, 6% calcium carbonate, 30% zinc oxide, 16% talcum powder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410124896.4A CN103849863B (en) | 2014-03-31 | 2014-03-31 | Screw thread quick phosphorization process |
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| CN201410124896.4A CN103849863B (en) | 2014-03-31 | 2014-03-31 | Screw thread quick phosphorization process |
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| CN103849863A true CN103849863A (en) | 2014-06-11 |
| CN103849863B CN103849863B (en) | 2015-08-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104630867A (en) * | 2015-02-17 | 2015-05-20 | 蚌埠市钰诚新材料科技有限公司 | High-efficiency electrolytic phosphating solution |
| CN111793793A (en) * | 2020-07-31 | 2020-10-20 | 张家港市升恒机械设备制造有限公司 | Phosphorization rust-proof treatment method for explosion-proof cabinet |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100516A (en) * | 1986-03-03 | 1986-09-10 | 华东添加剂公司 | Zinc-calcium series phosphatating liquid |
| RU2090650C1 (en) * | 1995-03-07 | 1997-09-20 | Акционерное общество закрытого типа "ФК" | Solution for phosphating the metallic surface |
| CN1210904A (en) * | 1998-07-06 | 1999-03-17 | 王梅 | Zinc-calcium series phosphorization liquid for metal plastic working |
| CN101440469B (en) * | 2008-10-28 | 2011-02-09 | 山东达驰电气有限公司 | Phosphating paste, preparation thereof and method for processing sealing surface of transformer box body by using the same |
-
2014
- 2014-03-31 CN CN201410124896.4A patent/CN103849863B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100516A (en) * | 1986-03-03 | 1986-09-10 | 华东添加剂公司 | Zinc-calcium series phosphatating liquid |
| RU2090650C1 (en) * | 1995-03-07 | 1997-09-20 | Акционерное общество закрытого типа "ФК" | Solution for phosphating the metallic surface |
| CN1210904A (en) * | 1998-07-06 | 1999-03-17 | 王梅 | Zinc-calcium series phosphorization liquid for metal plastic working |
| CN101440469B (en) * | 2008-10-28 | 2011-02-09 | 山东达驰电气有限公司 | Phosphating paste, preparation thereof and method for processing sealing surface of transformer box body by using the same |
Non-Patent Citations (1)
| Title |
|---|
| 陈谱: "《钻井技术手册（四）钻具》", 31 August 1992 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104630867A (en) * | 2015-02-17 | 2015-05-20 | 蚌埠市钰诚新材料科技有限公司 | High-efficiency electrolytic phosphating solution |
| CN111793793A (en) * | 2020-07-31 | 2020-10-20 | 张家港市升恒机械设备制造有限公司 | Phosphorization rust-proof treatment method for explosion-proof cabinet |
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| CN103849863B (en) | 2015-08-26 |
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Denomination of invention: Thread rapid phosphating process Effective date of registration: 20220802 Granted publication date: 20150826 Pledgee: Jiangsu Jinhu Mintai Village Bank Co.,Ltd. Pledgor: JIANGSU HONGFEI MACHINERY MANUFACTURE Co.,Ltd. Registration number: Y2022980011756 |
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Date of cancellation: 20230116 Granted publication date: 20150826 Pledgee: Jiangsu Jinhu Mintai Village Bank Co.,Ltd. Pledgor: JIANGSU HONGFEI MACHINERY MANUFACTURE Co.,Ltd. Registration number: Y2022980011756 |
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