CN101875255A - Multilayer corrosion-resistance coating and part comprising same - Google Patents
Multilayer corrosion-resistance coating and part comprising same Download PDFInfo
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- CN101875255A CN101875255A CN2009101359241A CN200910135924A CN101875255A CN 101875255 A CN101875255 A CN 101875255A CN 2009101359241 A CN2009101359241 A CN 2009101359241A CN 200910135924 A CN200910135924 A CN 200910135924A CN 101875255 A CN101875255 A CN 101875255A
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Abstract
The invention provides a multilayer corrosion-resistance coating and a part comprising the same. The multilayer corrosion-resistance coating comprises a first coating and a second coating, wherein the first coating comprises the following components in percent by mass: 5-7 percent of Al, 2.5-3.5 percent of Mg, 0.03-0.5 percent of rare earth element, a minute amount of impurities and the balance of Zn; and the second coating is selected from a group consisting of an aluminum-richened epoxy coating, a PA11 or PA 12(nylon) coating, a PA11 or PA12 (nylon) coating+PP (polypropylene) coating, a primer+PVE or PVDF coating. The part using the first coating and the aluminum-richened epoxy coating can resist a salt spray test for 3000h without red rust; meanwhile, the part using the first coating and other coatings can provide excellent corrosion-prevention property and has excellent machinability and better adhesive force of the coatings.
Description
Technical field
The present invention relates to the corrosion-resistant finishes field.
Background technology
Reason owing to environment for use, can cause the metal parts corrosion-vulnerable under some situation and influence its service life, the steel wire that more for example in adverse circumstances, uses, steel strand wires, tubing, sheet material and band etc., employed tubing in the automobile pipe-line system particularly, all these parts need possess corrosion resistant character and guarantee its service life.With employed tubing in the automobile pipe-line system is example, needs to guarantee the life-span of its tubing, with the normal operation of further guarantee automobile.At present, the most frequently used preparation method of corrosion resistant tubing strengthens its corrosion resistance in the corrosion resistant coating of the surface-coated of tubing, for example the galvanizing by dipping aluminium alloy covered.
Anti-neutral salt spray test is the common method that is used for detecting the corrosion resistance of coating tubing.In anti-neutral salt spray test, galvanizing by dipping aluminium alloy covered at present commonly used generally at 200 hours with the interior red rust that occurs.But along with the further raising that people require each side such as automotive performances, the decay resistance of its tubing also needs further raising, to adapt to whole auto-producing requirement.
At present, although the multilayer corrosion-resistance coating also comes into operation, because the restriction of coating material itself still is difficult to satisfy the corrosion resistance requirement that improves day by day in the auto industry production.
Summary of the invention
The invention provides a kind of multilayer corrosion-resistance coating, comprising: first coating comprises in Quality Percentage: 5～7% Al, 2.5～3.5% Mg, 0.03～0.5% rare earth element, the impurity of trace and the Zn of surplus.This coating can bear at least 500～1500 hours salt spray tests and not go out red rust, and coating adhesion is good in anti-neutral salt spray test.
In a preferred embodiment of the present invention, above-mentioned rare earth element can be at least a in the lanthanide series.In another preferred implementation, the used rare earth element of the present invention can be at least a in La, Ce and the combination thereof.The present invention another preferred embodiment in, employed rare earth element can be La and Ce.
In preferred implementation of the present invention, the content of rare earth element is 0.03～0.3%, and the content of Mg is 2.75～3.25%, and the content of Al is 5.5～6.5%.The impurity of above-mentioned trace is the impurity that is difficult to avoid in the alloy preparation known in the field, comprising: Fe≤0.02%, Cu≤0.02%, Pb≤0.01%, Cd≤0.001% and other impurity≤0.2%.
In a preferred embodiment of the present invention, the thickness of first coating is 3～18 microns.Another preferred embodiment in, further comprise second coating, be selected from the group that constitutes by rich aluminium epoxy coating, PA nylon coating, PA nylon coating+PP acrylic resin coating, priming paint+PVF or PVDF coating.Wherein, the thickness range of rich aluminium epoxy coating is more than 3 microns, be generally 3～10 microns, the thickness range of PA nylon coating is more than 120 microns, the thickness range of PP acrylic resin coating is 0.85～1.2 millimeter, the thickness of PVF or PVDF coating is more than 15 microns, and the PVF average thickness can be 20～30 microns, and the PVDF average thickness can be 25～60 microns.
Second coating can preferably be used rich aluminium epoxy coating.The coating of this preferred implementation of the present invention can reach 3000 hours salt spray tests and not go out red rust in anti-neutral salt spray test.
The present invention also provides a kind of parts with above-mentioned any coating, comprises the parts that are used for automobile brake or fuel conduit.These parts compared with prior art, have the anti-corrosion effects of improving greatly, for example, the anti-neutral salt spray time of first coating increases to 500～1500 hours, in preferred embodiment, first coating+rich aluminium epoxy coating can reach 3000 hours and not go out red rust.Use the parts of first coating+other second coatings that good corrosion prevention performance more can be provided, and the parts that have above-mentioned coating have good machinability.
Description of drawings
Fig. 1 is the cross section schematic diagram according to the multi-layer anticorrosion erosion resisting coating tubing of one embodiment of the present invention preparation.
Fig. 2 is the cross section schematic diagram of multi-layer anticorrosion erosion resisting coating tubing of preparation according to another implementation of the invention.
Fig. 3 is the cross section schematic diagram according to the multi-layer anticorrosion erosion resisting coating tubing of another embodiment preparation of the present invention.
Fig. 4 is the cross section schematic diagram according to the multi-layer anticorrosion erosion resisting coating tubing of another embodiment preparation of the present invention.
Fig. 5 is the erosion shield tubing photo according to embodiment of the invention preparation.
The specific embodiment
Below in conjunction with the specific embodiment the present invention is described in further detail, but it should be understood that these embodiments only are the purpose of example, the present invention is not limited to these embodiments.
The invention provides a kind of multilayer corrosion-resistance coating, comprising first coating that constitutes by following material: in Quality Percentage, 5～7% Al; 2.5～3.5% Mg; 0.03～0.5% rare earth element; Surplus is a unavoidable impurities in Zn and some preparations.Wherein the content of impurity is controlled at: Fe is no more than 0.02%; Cu is no more than 0.02%; Pb is no more than 0.01%; Cd is no more than 0.001%; Other impurity are no more than 0.2%.The thickness range of first coating is preferably 3～18 microns.
Rare earth element can be at least a in the lanthanide series.Preferably, rare earth element is at least a in La, Ce and the combination thereof.Preferred especially described rare earth element is La and Ce, and wherein La and Ce can add than mixing with any.The content of rare earth element is preferably 0.03～0.3%.The content of Mg is preferably 2.75～3.25%.The content of Al is preferably 5.5～6.5%.
In one embodiment, as shown in Figure 1, apply on basic tubing after first coating, continue to apply rich aluminium epoxy coating, the thickness range of rich aluminium epoxy coating can be 3～10 microns.After testing, performance is as follows:
1) this laminated coating tubing can reach 3000 hours salt spray tests and not go out red rust in anti-neutral salt spray test;
2) this laminated coating tubing through graduating with cutter+1000 hour salt mist experiment after, creep compliance is no more than 1.5mm, and compressed air adhesion layer do not occur after blowing and comes off;
3) this laminated coating tubing still can bear than great explosion pressure after the cyclic corrosion test,
The following tubing of for example basic tube outer diameter 10mm can bear the 14MPa burst pressure;
4) this laminated coating tubing soaks the softening and holiday of no coating after 24 hours in brake-fluid;
5) this laminated coating tubing coating tack is good, detects through damp and hot adhesion test, and at least 99% adhere to arranged.
In another embodiment, as shown in Figure 2, apply on basic tubing after first coating, continue to apply PA11 or PA12 nylon coating, the thickness range of nylon coating is more than 120 microns.The performance such as corrosion-resistant of this laminated coating tubing is better than the coating tubing of above-mentioned first coating+rich aluminium epoxy coating.
In another embodiment, as shown in Figure 3, on basic tubing, apply after first coating, continue to apply PA11 or PA12 nylon coating+PP (acrylic resin) coating, the thickness range of PA nylon coating is more than 120 microns, and the thickness range of PP acrylic resin coating is 0.85～1.2 millimeter.The performance such as corrosion-resistant of this laminated coating tubing also is better than the coating tubing of above-mentioned first coating+rich aluminium epoxy coating.
In another embodiment, as shown in Figure 4, on basic tubing, apply after first coating,, continue again to apply PVF or PVDF coating as binding agent with priming paint, thickness is more than 15 microns, constitutes the multilayer corrosion-resistance coating.Equally, the decay resistance of this laminated coating tubing also is better than the coating tubing of above-mentioned first coating+rich aluminium epoxy coating.
Coating of the present invention not only can be applied to automobile brake and fuel conduit, can also expand to the various fluid bearings pipelines that use on the automobile, comprises the gearbox pipeline, electronic-controlled power steering pipeline, cooling line, engine pipelines or the like.The operable matrix tubing of this coating product is for example: individual layer welding low carbon steel pipe, the seamless low carbon steel pipe of individual layer, double-deck welding low-carbon steel pipe, not coating low carbon steel pipe, have the copper facing coating low carbon steel pipe, have the nickel plating coating low carbon steel pipe, have low carbon steel pipe of zinc-nickel coating or the like.
Be example with automobile pipeline tubing below, specify the anticorrosion effect of the various embodiment coatings of the present invention.
Embodiment 1
Adopt the 4.76DW bimetallic tube to test the duplex coating test: to apply after first coating, apply rich aluminium epoxy resin (commercially available) coating again.Minimum 3 microns of first coating layer thickness, coating average weight 50～60g/m
2, minimum 3 microns of follow-up rich aluminium epoxy coating thickness, average weight 〉=10g/m
2Carry out the campaign checking after coating finishes, TI automobile (China) laboratory provides checking and is reported as follows shown in the table 1:
Table 1
Embodiment 2
In order further to verify coating performance, arrange four kinds of online expanding tests of tubing of 4.76DW/6.35DW/6.35SW/7.94SW, after finishing, test carried out serial checking again, and it is as shown in table 2 that TI automobile (China) laboratory provides the checking report:
Table 2
The result who repeats expanding test shows that this multilayer corrosion-resistance coating tubing has good corrosion prevention performance.
Embodiment 3
In order further to verify the machinability of coating tubing, respectively the coating tubing of the foregoing description 1 and 2 has been arranged brake forming and flaring test, the result satisfies the flaring test of A0005-115 degree, the dual flaring test requirement of Z183-90 degree.Moulding enlarging picture as shown in Figure 5.
It will be recognized by one of ordinary skill in the art that, coating of the present invention also is applicable to other aspects of anti-corrosion of metal, the steel wire that more for example uses in adverse circumstances, steel strand wires, tubing, sheet material and band etc. need the metal parts to anti-adverse environment, and be not limited to the disclosed above-mentioned metal parts of embodiment of the present invention, promptly be not confined to other applications of automobile pipe-line system.Scope of the present invention is limited by claims, those skilled in the art by practice as can be known to the various modifications of the specific embodiment disclosed herein and be equal to replacement and all fall in the scope of protection of present invention.
Claims (22)
1. multilayer corrosion-resistance coating, comprising:
First coating comprises in Quality Percentage: 5～7% Al, 2.5～3.5% Mg, 0.03～0.5% rare earth element, the impurity of trace and the Zn of surplus.
2. coating as claimed in claim 1, wherein said rare earth element are at least a in the lanthanide series.
3. coating as claimed in claim 2, wherein said rare earth element are at least a in La, Ce and the combination thereof.
4. coating as claimed in claim 3, wherein said rare earth element are La and Ce.
5. coating as claimed in claim 1, wherein the content of rare earth element is 0.03～0.3%.
6. coating as claimed in claim 1, wherein the content of Mg is 2.75～3.25%.
7. coating as claimed in claim 1, wherein the content of Al is 5.5～6.5%.
8. coating as claimed in claim 1, the impurity level of wherein said trace is: 0～0.251%.
9. coating as claimed in claim 8, the impurity of wherein said trace comprises: Fe≤0.02%; Cu≤0.02%; Pb≤0.01%; Cd≤0.001%; With other impurity≤0.2%.
10. coating as claimed in claim 1, wherein the thickness of first coating is 3～18 microns.
11. as each described coating in the claim 1～10, wherein further comprise second coating, described second coating is selected from the group that is made of rich aluminium epoxy coating, PA nylon coating, PA nylon coating+PP acrylic resin coating, priming paint+PVF or PVDF coating.
12. coating as claimed in claim 11, the thickness range of wherein rich aluminium epoxy coating is more than 3 microns, the thickness range of PA nylon coating is more than 120 microns, and the thickness range of acrylic resin coating is 0.85～1.2 millimeter, and the thickness of PVF or PVDF coating is more than 15 microns.
13. coating as claimed in claim 11, wherein second coating is rich aluminium epoxy coating.
14. coating as claimed in claim 1, the fluid bearings pipeline that wherein said coating is used for using on the automobile.
15. coating as claimed in claim 14, the fluid bearings pipeline that uses on the wherein said automobile comprises: brake piping, fuel conduit, gearbox pipeline, electronic-controlled power steering pipeline, cooling line, engine pipelines.
16. coating as claimed in claim 1, the matrix tubing that wherein said coating was suitable for comprises low carbon steel pipe.
17. coating as claimed in claim 16, wherein said low carbon steel pipe comprises: individual layer welding low carbon steel pipe, the seamless low carbon steel pipe of individual layer, double-deck welding low-carbon steel pipe, not coating low carbon steel pipe, have the copper facing coating low carbon steel pipe, have the low carbon steel pipe of nickel plating coating and have the low carbon steel pipe of zinc-nickel coating.
18. have parts as each described coating in the claim 1～17.
19. parts as claimed in claim 18, wherein said parts comprise the tubing of the fluid bearings pipeline that is used for using on the automobile.
20. parts as claimed in claim 19, the fluid bearings pipeline that uses on the wherein said automobile comprises: brake piping, fuel conduit, gearbox pipeline, electronic-controlled power steering pipeline, cooling line, engine pipelines.
21. parts as claimed in claim 18, the matrix tubing that uses in the wherein said parts comprises low carbon steel pipe.
22. parts as claimed in claim 21, wherein said low carbon steel pipe comprises: individual layer welding low carbon steel pipe, the seamless low carbon steel pipe of individual layer, double-deck welding low-carbon steel pipe, not coating low carbon steel pipe, have the copper facing coating low carbon steel pipe, have the low carbon steel pipe of nickel plating coating and have the low carbon steel pipe of zinc-nickel coating.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101359241A CN101875255A (en) | 2009-04-30 | 2009-04-30 | Multilayer corrosion-resistance coating and part comprising same |
| PCT/CN2010/072147 WO2010124596A1 (en) | 2009-04-30 | 2010-04-23 | Corrosion resistant alloy material, coating with said material and part with said coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101359241A CN101875255A (en) | 2009-04-30 | 2009-04-30 | Multilayer corrosion-resistance coating and part comprising same |
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| CN101875255A true CN101875255A (en) | 2010-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101359241A Pending CN101875255A (en) | 2009-04-30 | 2009-04-30 | Multilayer corrosion-resistance coating and part comprising same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013127353A1 (en) * | 2012-02-29 | 2013-09-06 | Bundy Fluid Systems Co., Ltd | Coated tube |
| WO2013155934A1 (en) * | 2012-04-17 | 2013-10-24 | 新兴铸管股份有限公司 | Anticorrosive coating for buried black metal-based pipeline and method for spraying same |
| CN103644388A (en) * | 2013-11-28 | 2014-03-19 | 无锡合众信息科技有限公司 | Salt-tolerant composite multilayer pipe |
| CN107270748A (en) * | 2017-06-27 | 2017-10-20 | 攀钢集团攀枝花钢钒有限公司 | Shell and tube cooler and anticorrosive construction technique for metallurgy rolling system |
| CN114230375A (en) * | 2022-01-04 | 2022-03-25 | 陕西宝光陶瓷科技有限公司 | Ceramic substrate surface metallization coating composition |
-
2009
- 2009-04-30 CN CN2009101359241A patent/CN101875255A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013127353A1 (en) * | 2012-02-29 | 2013-09-06 | Bundy Fluid Systems Co., Ltd | Coated tube |
| WO2013155934A1 (en) * | 2012-04-17 | 2013-10-24 | 新兴铸管股份有限公司 | Anticorrosive coating for buried black metal-based pipeline and method for spraying same |
| EA030442B1 (en) * | 2012-04-17 | 2018-08-31 | Синьсин Дактайл Айен Пайпс Ко., Лтд | Anticorrosive coating for buried black metal-based pipeline and method for spraying same |
| EP3800392A3 (en) * | 2012-04-17 | 2021-06-23 | Xinxing Ductile Iron Pipes Co., Ltd | Anticorrosive coating for buried black metal-based pipeline and method for spraying same |
| CN103644388A (en) * | 2013-11-28 | 2014-03-19 | 无锡合众信息科技有限公司 | Salt-tolerant composite multilayer pipe |
| CN107270748A (en) * | 2017-06-27 | 2017-10-20 | 攀钢集团攀枝花钢钒有限公司 | Shell and tube cooler and anticorrosive construction technique for metallurgy rolling system |
| CN114230375A (en) * | 2022-01-04 | 2022-03-25 | 陕西宝光陶瓷科技有限公司 | Ceramic substrate surface metallization coating composition |
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Application publication date: 20101103 |