Method for performing anticorrosive hydrophobic modification on surface of aluminum alloy
A technology of aluminum alloy surface and hydrophobic treatment, which is applied in the direction of anti-corrosion coating, metal material coating process, coating, etc., can solve the problems of high price, poor thermal conductivity, etc. Thin effect
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example 1
[0032] Aluminum alloy surface treatment: Aluminum alloy materials are degreased by hot alkaline solution, rinsed with water, and dried. Secondly, use the reductive acidic cleaning solution of the present invention (7% hydrochloric acid, 5% sulfuric acid, 3% nickel chloride, 1‰Lan-826 corrosion inhibitor, and the balance is water) to carry out surface activation treatment at normal temperature for 5 minutes. After that, rinse with water, and passivate and seal the active surface for 10 minutes to obtain a moderately rough, brown-black surface. Among them, the passivation solution is fluoride (potassium fluoride or sodium fluoride, etc.) 1‰, phosphate 1%, nitrate (potassium nitrate, sodium nitrate or ammonium nitrate, etc.) 2. The balance is water. The blocking solution is composed of 5% silicate, 1‰ cerate, and the balance is water, and the pH value is adjusted to 10.
[0033] The coating used is composed of two components, the weight ratio of components A and B is 10:1, and ...
example 2
[0036] Aluminum alloy surface treatment: Aluminum alloy materials are degreased by hot alkaline solution, rinsed with water, and dried. Secondly, use the reductive acid cleaning solution of the present invention to carry out surface activation treatment for 5 minutes (hydrochloric acid 8%, phosphoric acid 5%, reductive ferrous chloride 3%, 3‰Lan-826 corrosion inhibitor, surplus is water) . After that, rinse with water, and passivate and seal the active surface for 15 minutes to obtain a moderately rough, brown-black surface. Among them, the activated surface passivation solution is composed of 3‰ of fluoride (potassium fluoride or sodium fluoride, etc.), 3% of phosphate, 3% of chromium trioxide oxidant, and the balance is water. Phosphoric acid is used to adjust the pH value of 1 to 2 . The blocking solution is composed of 8% silicate, 1‰ cerium chloride, and the balance is water, and the pH value is adjusted to 11.
[0037] The coating used is composed of two components, t...
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