Nanosized rare-earth modified chromate-free aluminum profile passivation treating fluid and preparing method thereof

Abstract

The invention discloses nanosized rare-earth modified chromate-free aluminum profile passivation treating fluid. The treating fluid comprises the following ingredients, by weight part, of 10-10.5 parts of cerous nitrate, 2-2.2 parts of potassium permanganate, 0.6-0.8 part of nanosized rare earth, 0.3-0.4 part of lactic acid cobalt, 0.6-0.8 part of kojic acid, 0.5-0.6 part of fluosilicic acid, 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 silicon dioxide, 0.3-0.4 part of nano titanium dioxide and the defined amount of deionized water. Oxidation films generated by the treating fluid can improve paint coating performance and are compact and even. By means of the nanosized rare earth, the lactic acid cobalt, the kojic acid and the fluosilicic acid, the compactness, the hardness and the corrosion resistance of the oxidation films are obviously improved.

Description

technical field [0001] The invention relates to the technical field, in particular to a chromium-free passivation treatment liquid for aluminum profiles modified by nano-rare earth 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 resistance. At present, there are many studies on the chromiu...

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