What is anticorrosive phosphating?

Steel pipe anticorrosion refers to the use of steel pipe as a medium, and the steel pipe in use and transportation is affected by the use environment and the transport medium, causing the steel pipe to undergo chemical or electrochemical reactions to cause corrosion. According to China's statistics, the annual direct economic loss of steel pipe corrosion in China is more than 280 billion yuan. At present, the annual global loss due to corrosion is as high as 500 billion US dollars.

Phosphorization is a process of chemical and electrochemical reaction to form a phosphate chemical conversion film. The formed phosphate conversion film is called a phosphate film.

The purpose of phosphating is to provide protection for the base metal and prevent the metal from being corroded to a certain extent; used as a primer before painting to improve the adhesion and anti-corrosion ability of the paint film layer; to reduce friction in the metal cold working process Use for lubrication.

Phosphating process has been applied to industry for more than 90 years, and can be roughly divided into three periods: the period of laying the foundation of phosphating technology, the period of rapid development of phosphating technology, and the period of widespread application.