CN1013649B - Technology for coating antiwear and anti-corrosion multi-hierarchical protection layer on metallic surfac - Google Patents
Technology for coating antiwear and anti-corrosion multi-hierarchical protection layer on metallic surfacInfo
- Publication number
- CN1013649B CN1013649B CN 88107013 CN88107013A CN1013649B CN 1013649 B CN1013649 B CN 1013649B CN 88107013 CN88107013 CN 88107013 CN 88107013 A CN88107013 A CN 88107013A CN 1013649 B CN1013649 B CN 1013649B
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- China
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- coating
- workpiece
- nylon
- present
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention relates to coating technology of a multilayer protective coating layer. The present invention is characterized in that optimized compound nylon, copolymerization nylon and polyether polyurethane which have favorable adhesive properties, wearing resistance and cavitation erosion resistance are coated on the surface of metal; during coating, the preheating temperature of a work piece is from 210 DEG C to 250 DEG C, 150 DEG C to 200 DEG C and 120 DEG C to 140 DEG C, and material and layers are selectively combined according to needs. The present invention has the advantages that a multilayer complete protective layer is formed without using an adhesive agent; process steps are reduced; the multilayer complete protective layer can be completed in one time of construction technology. The present invention can be used for the abrasion protection water turbines, water pumps, machines, pipelines, valves, oceanographic ship engineering and coal dressing machines.
Description
The invention belongs to the chemical coating coatings art.
Existing is the purpose protective finish with the corrosion protection abrasion resistant, based on single coating thin layer, multilayer protective coating then adopts adhesive the levels bonding together, to solve the bonding problem between the coating, improve bonding strength, GB1123541, US4443519 adopts this method adhesive coating level, and its weak point is, adhesive itself does not possess the condition of protective layer, do not shield, in conjunction with not firm, layering comes off easily under strong cavitation erosion (abrasion) operating mode between the different coating; " hydraulic the composite nylon resisting silt abrasion coating formula and the construction technology " of China State Scientific and Technological Commission announcement in 1979, " the epoxy carborundum coating formula and the construction technology of hydraulic resisting silt abrasion " object of invention; its abrasion resistance is used good, and cavitation resistive property be difficult to satisfy in the protection of strong cavitation erosion operating mode.
The object of the present invention is to provide the coating process method of the protective finish with good cementability and wear-resistant cavitation resistive property of the multi-level combination of a kind of metal surface coated, multilayer is fused into one, resist the destruction of the operating mode that cavitates more by force.
The present invention be according to preferred different coating material to the different requirements of temperature, utilize to produce interface-cross-linkedly its melt surface state under, combine together, produces enough adhesions, to resist the destruction of external condition (cavitation erosion and denude).
Characteristics of the present invention are at metal surface coated composite nylon, copolymer nylon (T-130), and workpiece is earlier through sandblast (deoil and derust), gamma-aminopropyl-triethoxy-silane (KH550) coupling agent solution (KH550 before the EU, coated
0.6～10The % anhydrous hexanol) do the surface and handle, again workpiece (metal surface) is given heat to 250 ℃～210 ℃, coated composite nylon (bottom), the Optimal Control temperature is 220 ℃; Then workpiece is given again heat to 200 ℃～150 ℃, coated T-130 copolymer nylon, as the intermediate layer, the Optimal Control temperature is 170 ℃; Polyurethane gives aggressiveness (polytetrahydrofuran diol, toluene di-isocyanate(TDI)) must add through vavuum pump degassing back under 80 ℃ of temperature quantitatively be give aggressiveness weight 14～16% and keep 120 ℃ liquid chain extender MOCA(3,3 ' dichloro,-4,4 MDAs), after fiercely mixing, the surface of injecting the T-130 copolymer nylon that is molten condition is as the top layer, the hot temperature of giving of workpiece was 140 ℃～120 ℃ before polyurethane injected, and the Optimal Control temperature is 130 ℃
Each layer can be selected combined material and coated thickness according to actual needs.
Introduce coating process in detail below in conjunction with embodiment:
All protected workpiece (metal surface) rust cleaning sandblast of deoiling earlier with putting baking oven into after the coupling agent surface treatment, is heated to 250 ℃, and outlet (using spray gun, as follows) spraying composite nylon advances baking oven afterwards again and is heated to 200 ℃ again; Outlet spraying copolymer nylon (T-130) heavily advances baking oven thereafter and is heated to 140 ℃, and polyurethane gives aggressiveness before coated, adds chain extender MOCA(3 after 80 ℃ of degassings, 3 ' dichloro ,-4,4 ' MDA) promptly
Take out workpiece from baking oven and pour into a mould the EU surface layer again, be placed at last in 120 ℃ of incubators and kept 4 hours, take out and promptly finish coating process.
By workpiece to the requirement of multi-level combination coating; do not use the adhesive adhesion between the coating; give in the thermal process at workpiece; prevent coating aging, so the Optimal Control temperature of coated is respectively 220 ℃, 170 ℃, 130 ℃, when reaching above relevant temperature; fusion appears in coating surface; the coating generation is interface-cross-linked up and down, and combining closely fuses into one, and forms a Global Macros layer.
Composite nylon has good cementability and wear resistence, therefore keep it as basic unit's (bottom) part, gasproof erosion performance will be strengthened in workpiece a part, can spray the gasproof erosion better copolymer nylon of performance (T-130) (gasproof erosion performance is more than 1.6 times of composite nylon) on the composite nylon surface again, above measure still can not meet the demands can be on the basis of copolymer nylon coated EU (gasproof erosion performance is 15 times of composite nylon), copolymer nylon also plays the adhesive effect as composite nylon surface peening intermediate layer.Like this, the coated level can lose performance demands to gasproof by workpiece, and the selection level material of target is arranged, and is combined into the protective layer of an integral body.Coating gasproof erosion performance relatively sees Table:
The present invention has received unexpected effect in actual applications:
Through multi-level coated protection, the acute pump impeller of wearing and tearing (is taken out yellow No. four pump impeller: the Q=4m in the Yellow River of irrigation such as the Guanzhong，Shanxi east3/ s, H=110m), the protection effect in strong destruction region reaches 1000 hours, and after coating grinds off, coated again, and 1 1Cr13Stainless steel pump impeller cost is 100,000 yuan, and the life-span only is 1800 hours, and surface layer can prolong 3 times (extending to 1500 hours from 500 hours) with the choma coating life of polyurethane.
The desired Wear-proof protective finish of hydraulic requires to be consistent in the present invention and many silt particles (or contain solid particle the corrosive liquid medium arranged) water; can select various combination by different protective layers (namely deciding by the serious situation of the wear of work); key position then can be strengthened; by full combination coating, its cavitation resistive property can significantly improve.
Advantage of the present invention is:
1, do not use adhesive effectively to be bonded together different coating, and combine together, become a complete protective layer;
2, the combination level of coating is to meet the natural law that the coated temperature reduces gradually through optimizing selection, simultaneously, the desired temperature of inferior one deck coated, it also is a last coating heat fusing temperature, it is interface-cross-linked that two-layer contact-making surface is taken place under molten condition, becomes the over current protection layer that is different from lower protective layer;
3, can be according to the difference requirement of operating mode and the needs of different parts, selection combined material and thickness that can be more economical play more effectively protective effect;
4, reduce operation, whole coating procedure can once be finished in the construction.
The present invention can be used for: the power station hydraulic turbine on many sand river, water pump protection; Protection to the machinery that contains corrosive medium, pipeline, valve; Also can be used for the protection of boats and ships, ocean engineering, coal preparation machine.
Claims (2)
1, a kind of coated technique that applies the multi-level protective finish of composite nylon, copolymer nylon, EU in the metal surface, at first, metal surface (workpiece) is through sandblast (deoil and derust), r-aminopropyl triethoxysilane (KH550) coupling agent solution
(KH550
0.6-1.0The % absolute ethyl alcohol) surface treatment is characterized in that:
Workpiece after the surface treatment (metal surface) is preheating to 250 ℃～210 ℃, coating composite nylon (bottom), the Optimal Control temperature is 220 ℃;
The preheat temperature of coating T-130 copolymer nylon (intermediate layer) workpiece is 220 ℃～150 ℃, and the Optimal Control temperature is 170 ℃;
Base polyurethane prepolymer for use as (polytetrahydrofuran diol, toluene di-isocyanate(TDI)) must under 80 ℃ of temperature after the vavuum pump degassing, add quantitatively for performed polymer weight 14～16% and protect 120 ℃ liquid chain extender MOCA (3,3 ' dichloro,-4,4 ' MDA), after fiercely mixing, the surface of injecting the T-130 copolymer nylon that is molten condition is as the top layer;
The preheat temperature of polyurethane coating (top layer) workpiece is 140 ℃～120 ℃, and the Optimal Control temperature is 130 ℃.
2,, it is characterized in that each level can select applied thickness according to actual needs according to the described coated technique of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88107013 CN1013649B (en) | 1988-10-24 | 1988-10-24 | Technology for coating antiwear and anti-corrosion multi-hierarchical protection layer on metallic surfac |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88107013 CN1013649B (en) | 1988-10-24 | 1988-10-24 | Technology for coating antiwear and anti-corrosion multi-hierarchical protection layer on metallic surfac |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1032910A CN1032910A (en) | 1989-05-17 |
| CN1013649B true CN1013649B (en) | 1991-08-28 |
Family
ID=4834478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88107013 Expired CN1013649B (en) | 1988-10-24 | 1988-10-24 | Technology for coating antiwear and anti-corrosion multi-hierarchical protection layer on metallic surfac |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1013649B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010083489A1 (en) | 2009-01-19 | 2010-07-22 | Bp Corporation North America Inc. | Method and system for predicting corrosion rates using mechanistic models |
| CN102211428B (en) * | 2011-04-22 | 2014-05-07 | 河海大学 | Cavitation corrosion gradient reparation coating of water pump blade and producing method thereof |
| CN102794263B (en) * | 2012-08-21 | 2014-06-18 | 山西银河镀锌有限公司 | Nylon 11 coating method of metal butterfly valve |
| CN104235076A (en) * | 2013-06-18 | 2014-12-24 | 陈存东 | Polyurethane inlaid injection and coating techniques applied to pump and pump parts |
| CN111330827A (en) * | 2020-04-10 | 2020-06-26 | 北京永逸舒克防腐蚀技术有限公司 | Corrosion protection method for gas lock well equipment |
-
1988
- 1988-10-24 CN CN 88107013 patent/CN1013649B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1032910A (en) | 1989-05-17 |
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