High-corrosion-resistance phosphating solution and preparation method thereof

Abstract

The invention discloses a high-corrosion-resistance phosphating solution and a preparation method thereof. The high-corrosion-resistance phosphating solution is prepared from raw materials including, by weight, 35-56 parts of deionized water, 6-8 parts of hexamethylene tetramine, 2-7 parts of sodium fluoborate, 5-8 parts of hydroxylamine sulfate, 4-8 parts of stearic acid triethanolamine ester quaternary ammonium salt, 4-5 parts of phenyltriethoxysilane, 4-9 parts of tartaric acid, 22-24 parts of acetic acid butanol, 2-6 parts of sodium dodecyl sulfate, 1-8 parts of sodium lauryl sulfate, 2-6 parts of ethylenediamine tetraacetic acid, 3-6 parts of dimethylcydosiloxane and 6-10 parts of glycerin. Compared with existing phosphating solutions and phosphating technologies, workpieces are subjected to phosphating treatment through the high-corrosion-resistance phosphating solution, the phosphating process is simplified, the phosphating efficiency is improved, and the phosphating cost is reduced; and meanwhile, a phosphating film formed by means of the high-corrosion-resistance phosphating solution is more compact and more uniform, the workpieces can be protected against corrosion effectively, the preparation method is simple and convenient, and the cost is low.

Description

technical field [0001] The invention relates to a highly corrosion-resistant phosphating solution and a preparation method thereof. Background technique [0002] Phosphating is a commonly used pretreatment technology. In principle, it should belong to chemical conversion film treatment. It is mainly used for phosphating on the surface of steel, and non-ferrous metals (such as aluminum and zinc) can also be phosphating. Phosphating is a process in which chemical and electrochemical reactions form a phosphate chemical conversion film, and the formed phosphate conversion film is called a phosphating film. The purpose of phosphating is mainly to provide protection for the base metal and prevent the metal from being corroded to a certain extent; it is used as a primer before painting to improve the adhesion and anti-corrosion ability of the paint film layer; it can reduce friction in the metal cold processing process Lubrication. The phosphating process includes chemical and el...

AI Technical Summary

Problems solved by technology

Although scientists have done a lot of research in this area, it is not yet fully understood

After the end of World War II, there were few breakthroughs in phosphating technology, but steady development and improvement.

However, the phosphating agents on the market now have a thin phosphating film of 2-4 μm after the workpiece is phosphating, which has poor corrosion resistance and is easy to hang dust, which cannot meet the corrosion resistance requirements of the workpiece.