Multilayer corrosion-resistance coating and part comprising same

A corrosion-resistant coating and coating technology, used in coatings, anti-corrosion coatings, layered products, etc., can solve problems such as difficulty in meeting corrosion resistance requirements

Inactive Publication Date: 2010-11-03
邦迪管路系统有限公司 +6
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, although multi-layer corrosion-resistant coatings have also been put into use, it is still difficult to meet the increasing corrosion resistance requirements of the automotive industry due to the limitations of the coating materials themselves.

Method used

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  • Multilayer corrosion-resistance coating and part comprising same
  • Multilayer corrosion-resistance coating and part comprising same
  • Multilayer corrosion-resistance coating and part comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Two-layer coating tests were tested using a 4.76 DW double-layer pipe: the first coat was applied followed by an aluminum-rich epoxy (commercially available) coat. The minimum thickness of the first coating is 3 microns, and the average coating weight is 50-60g / m 2 , the minimum thickness of subsequent aluminum-rich epoxy coating is 3 microns, and the average weight is ≥10g / m 2 . After the coating is completed, a series of test verifications are carried out, and the verification report given by the TI Automotive (China) laboratory is shown in Table 1 below:

[0033] Table 1

[0034]

Embodiment 2

[0036] In order to further verify the coating performance, four kinds of pipes of 4.76DW / 6.35DW / 6.35SW / 7.94SW were arranged for online expansion test. After the test was completed, a series of verification was carried out. TI Automotive (China) laboratory gave a verification report as shown in Table 2. Show:

[0037] Table 2

[0038]

[0039] The results of repeated expansion tests show that this multi-layer corrosion-resistant coating pipe has excellent anti-corrosion performance.

Embodiment 3

[0041] In order to further verify the machinability of the coated pipe, bending forming and flaring tests were arranged for the coated pipes of the above-mentioned examples 1 and 2, and the results met the A0005-115 degree flaring test and the Z183-90 degree double flaring test Require. Forming flaring pictures such as Figure 5 shown.

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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 [0001] The invention relates to the field of corrosion-resistant coatings. Background technique [0002] Due to the use environment, in some cases, metal parts are susceptible to corrosion and affect their service life, such as some steel wires, steel strands, pipes, plates and strips used in harsh environments, especially automotive pipelines The pipes used in the system, all these parts need to have corrosion resistance properties to ensure their service life. Taking the pipes used in the automobile piping system as an example, it is necessary to ensure the life of the pipes to further ensure the normal operation of the automobile. At present, the most common preparation method for corrosion-resistant pipes is to coat the surface of the pipes with a corrosion-resistant coating to enhance their corrosion resistance, such as hot-dip galvanized aluminum alloy coating. [0003] The neutral salt spray test is a common method used to test the corrosion resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B33/00B32B15/04C23F15/00C09D5/10C09D163/00
Inventor 黄金和赵哲宁翟树民董立峰曹柏文陈明洪孙其俊李国成陈义方李仕军单焕民
Owner 邦迪管路系统有限公司
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