Sealing agent for micro-arc oxidation film

[0020] Preparation of sealing agent: Take 5 parts of deionized water, add 90 parts of ethanol and stir for 2-3 minutes, then add 4 parts of γ-mercaptopropyltriethoxysilane and stir for 3-5 minutes, then add 1 part of WA-610, drop Add 40% glacial acetic acid to adjust the pH value to 9.5, stir for 5 minutes, and use it after standing for 24 hours.

[0021] Select a 6063 aluminum alloy specimen with a specification of 100mm×100mm×2mm, treat it with micro-arc oxidation for 20 minutes (the average film thickness is 15 μm), then clean it with deionized water, dry it at 80-100°C for 20 minutes, and then immerse it in the above sealant After 2-3 minutes, take it out, drain the residual liquid and put it in an oven at 150°C for 30 minutes to cure.

[0022] The product performance is tested and the following conclusions are drawn.

[0023] (1) Corrosion resistance: figure 1 It is the surface state of the 6063 aluminum alloy micro-arc oxidation test piece when the hole is not sealed and

[0033] Preparation of sealing agent: Take 6.5 parts of deionized water, add 90 parts of methanol and stir for 2-3 minutes, then add 3 parts of γ-mercaptopropyltrimethoxysilane and stir for 3-5 minutes, then add 0.5 parts of WA-610 and stir for 1- After 2 minutes, add 40% glacial acetic acid dropwise to adjust the pH value to 4.5, and then use it after standing for 24 hours.

[0034] After the 5083 aluminum alloy specimen with a size of 100mm×50mm×2mm was micro-arc oxidized for 15 minutes (the average film thickness was 12 μm), it was cleaned with deionized water, dried at 80-100°C for 20 minutes, and then immersed in the above sealant for 2-3 minutes. , take it out, drain the residue and place it in an oven at 130°C for 40 minutes to cure.

[0035] The relevant test of processed product is carried out according to embodiment 1. There is no sensory change in the appearance of the micro-arc oxidation film before and after sealing; the salt spray test level exceeds 1000h; the antif

[0037] Preparation of sealing agent: Take 8 parts of deionized water, add 86 parts of methanol and stir for 2-3 minutes, then add 3 parts of γ-mercaptopropyltrimethoxysilane and 2 parts of γ-glycidyl etheroxypropyltrimethoxysilane and mix Stir for 3-5min, then add 1 portion of WA-610 and stir for 1-2min, add 40% glacial acetic acid dropwise to adjust the pH value to 4.5, leave it for 24h before use.

[0038] After micro-arc oxidation treatment of φ100mm×5mm ZL102 aluminum alloy casting for 25min (film thickness 20μm), clean it with deionized water, dry it at 80-100℃ for 20min, then immerse it in the above sealing agent for 2-3min, take it out and drain it The residual liquid was then placed in an oven at 130°C for 40 minutes to cure.

[0039] The relevant test of processed product is carried out according to embodiment 1. There is no sensory change in the appearance of the micro-arc oxidation film before and after sealing; the salt spray test level exceeds 1000h; the antifouling