Aluminum profile environment-friendly composite chromate-free passivation conditioning fluid and preparing method thereof

Abstract

The invention discloses aluminum profile environment-friendly composite chromate-free passivation conditioning fluid. The aluminum profile environment-friendly composite chromate-free passivation conditioning fluid comprises, by weight, 9.6-10 parts of cerous nitrate, 2-2.2 parts of potassium permanganate, 0.2-0.3 part of glycerin, 0.1-0.2 part of benzisothiazolones, 1.2-1.3 parts of K2ZrF6, 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 nanosilicon dioxide, 0.3-0.4 part of nanometer titania and an appropriate amount of deionized water. By means of the conditioning fluid, an oxidation film can be rapidly formed evenly; the glycerin, the benzisothiazolones and the K2ZrF6 are used, so that film-forming property and the corrosion resistance are improved; the film is rough in surface; and the binding ability of the aluminum alloy and a macromolecule coating is better improved.

Description

technical field [0001] The invention relates to the technical field of chromium-free metal surface treatment agents, in particular to an environmentally friendly composite chromium-free passivation treatment solution for aluminum profiles 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 resi...

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