High weather-resistance aluminum alloy chromate-free passivator and preparation method thereof
A chromium-free passivator and high weather resistance technology, applied in the coating process of metal materials, etc., can solve the problems of limited application, corrosion resistance and poor adhesion, and achieve long service life, good corrosion resistance, and excellent The effect of intensity
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[0014] A chromium-free passivator for aluminum alloy with high weather resistance, which is prepared from the following parts by weight of raw materials:
[0015] 40% fluotitanic acid 5, 40% fluozirconic acid 5, sodium fluoride 1, 65% nitric acid 1, benzotriazole 1, polyoxyethylene laurate 0.5, propyl gallate 0.3, hydroxyethylidene diphosphate 3. Film forming aid 50, hydroxypropyl methylcellulose 1, water 800;
[0016] The film forming aid is made of the following raw materials in parts by weight: polyvinyl alcohol 1, bisphenol A epoxy resin 10, glyceryl monostearate 0.5, acrylic acid 4, carbon nanotubes 1, ethylene glycol butyl ether 10. Diethanolamine 5, dibenzoyl peroxide 0.2, water 60; the preparation method of the film forming aid is to add polyvinyl alcohol, bisphenol A epoxy resin and glycerol monostearate into the reaction vessel at 85°C Stir for 4h, first add ethylene glycol butyl ether at 120℃ and stir until it melts, then add dibenzoyl peroxide, acrylic acid and carbon ...
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