Surface treatment agent capable of generating brown stable rust layer

Abstract

The invention discloses a surface treatment agent capable of generating a brown stable rust layer. The surface treatment agent is prepared from the following ingredients in percentage by mass: 30 to 35 percent of alcohol-soluble phenolic aldehyde varnish, 20 to 25 percent of NiSO4, 2 to 5 percent of CuSO4, 2 to 3 percent of sodium tungstate, 2 to 5 percent of trisodium orthophosphate, 5 to 10 percent of NaHSO3 and 28 to 33 percent of diluting solvents. The surface treatment agent is suitable for bare steel coating; after bare steel is coated with the surface treatment agent, a brown uniform and stable rust layer is generated on the surface; the long-time effective rust liquid flowing and hanging prevention and anti-corrosion performance is realized; in addition, the used surface treatmentagent does not have the strong pungent smell; chromium and nitrite are not contained; safety and environment protection are realized.

Description

technical field [0001] The invention belongs to the technical field of metal protection, in particular to a surface treatment agent for forming a brown stable rust layer. Background technique [0002] Metal corrosion is a failure process of metals under the action of environmental corrosive media. It is the inverse process of metallurgical production, and the entropy is constantly increasing. It is an inevitable natural phenomenon that occurs completely spontaneously. Atmospheric corrosion is an important cause of early failure and damage of products, equipment, devices, structural parts, etc., and the economic losses caused by atmospheric corrosion are serious every year. [0003] In the atmospheric natural environment, the formation of a stable protective rust layer on bare steel is a gradual process, which takes a long time, at least 3 years, and some bare steel surfaces form a dense and stable rust layer for more than 10 years. In the process of forming a stable rust la...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a surface treatment agent that generates a brown stable rust layer, which is suitable for bare steel coating, in view of the current requirements for the appearance and color of different rust layers and the insufficient protection stability of the rust layer obtained by the existing surface treatment agent. , can produce a brown uniform and stable rust layer on the bare steel surface, with excellent and stable anti-rust liquid sagging and anti-corrosion properties