Environmentally friendly anti-corrosion phosphatizing liquid and preparation method thereof

Abstract

The invention discloses environmentally friendly anti-corrosion phosphatizing liquid and a preparation method thereof. The environmentally friendly anti-corrosion phosphatizing liquid is prepared from the following raw materials in parts by weight: 35-56 parts of deionized water, 12-16 parts of zinc dihydrogen phosphate, 4-7 parts of sodium polystyrene sulfonate, 4-8 parts of ethylenediamine tetraacetic acid, 1-3 parts of polyvinylpyrrolidone, 3-7 parts of ammonium peroxydisulfate, 18-22 parts of sodium dodecyl sulfate, 5-10 parts of 1,5-methylene-3,7-dintrio1,3,5,7-tetraazacyclooctane, 7-9 parts of soybean ethyl sulfate morpholine, and 5-9 parts of hexamethylenamine. Compared with existing phosphatizing liquid and an existing phosphatizing technology, the environmentally friendly anti-corrosion phosphatizing liquid disclosed by the invention is used for phosphatizing workpieces, so that the phosphatizing technology is simplified, the phosphatizing efficiency is improved, and the phosphatizing cost is reduced; and meanwhile, a phosphatizing film formed by the environmentally friendly anti-corrosion phosphatizing liquid disclosed by the invention is compact and uniform, can effectively prevent the workpieces from being rusted, and is safe and environmentally friendly, the preparation method is simple, and the cost is low.

Description

technical field [0001] The invention relates to an environment-friendly 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 ...

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. At the same time, there are many processes, Large energy consumption, serious waste, and does not meet the needs of clean production development in the existing society