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
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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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