Aluminum profile chromate-free passivation treating solution good in film forming property and preparation method thereof

Abstract

The invention discloses an aluminum profile chromate-free passivation treating solution good in film forming property. The aluminum profile chromate-free passivation treating solution is prepared from the raw materials of, by weight, 10-10.5 parts of cerous nitrate, 2-2.2 parts of potassium permanganate, 0.3-0.4 part of methyl laurate, 0.6-0.8 part of octadecanol, 0.3-0.4 part of butyl ether acetate, 0.5-0.6 part of ammonium dihydrogen phosphate, 0.6-0.8 part of styrene, 0.2-0.3 part of acrylamide, 0.4-0.5 part of crylic acid, 0.05-0.1 part of azodiisobutyronitrile, 0.5-0.6 part of sodium allylsulfonate, 0.02-0.03 part of lauryl sodium sulfate, 0.9-1 part of cetane, 0.3-0.4 part of nano silica, 0.3-0.4 part of nano titania and an appropriate amount of deionized water. By means of the treating solution, the coating performance of paint can be improved, and a formed film is more compact and uniform; by the utilization of the methyl laurate, the octadecanol, the butyl ether acetate and the ammonium dihydrogen phosphate, film forming can be promoted, and the compact oxidation film can be formed rapidly.

Description

technical field [0001] The invention relates to the technical field of chromium-free metal surface treatment agents, in particular to a chromium-free passivation treatment solution for aluminum profiles with good film-forming properties and a preparation method thereof. Background technique [0002] Chromate chemical passivation method is often used for pretreatment of sprayed aluminum profiles before painting, but hexavalent chromium ions in chromate treatment have carcinogenic effects on the human body, and improper treatment will cause serious pollution to the environment, so chromate Passivation processes are of great concern and some countries have restricted their use. In recent years, a lot of research has been done on the chromium-free passivation process at home and abroad, and a variety of passivation solution treatment systems such as rare earth, cobalt salt, silicate, molybdic acid, titanium / zirconate, etc. have been developed, which have certain corrosion resist...

AI Technical Summary

Problems solved by technology

At present, there are many studies on the chromium-free passivation process using rare earth cerium compound as the main component, but there are many kinds of rare earth cerium salt and oxidant. Good film-forming effect and appearance, but the passivation effect of the treatment agent still has the disadvantages of insufficient uniformity of the passivation film, insufficient compactness, slow processing speed, and insufficient corrosion resistance, which need to be improved