Oil removing and rust removing agent used for treating metal surface

Abstract

The invention discloses an oil removing and rust removing agent used for treating a metal surface. The oil removing and rust removing agent comprises, by weight, 5-8 parts of hydrochloric acid, 8-12 parts of phosphoric acid, 3-6 parts of oxalic acid, 3-5 parts of tartaric acid, 2-4 parts of citric acid, 2-4 parts of nonionic surfactant, 2-4 parts of an anionic surfactant, 2-5 parts of ethylene diamine tetraacetic acid, 1-2 parts of sodium ethylenediamine tetramethylene phosphonate, 2-4 parts of thiourea, 1-2 parts of urotropine, 2-3 parts of polyester modified silicone oil, 2-4 parts of HEDP, 2-5 parts of polyethylene glycol oleate and 70-100 parts of water. The oil removing and rust removing agent can be used for conducting oil removing and rust removing on the metal surface at the same time, safety and environment friendliness are achieved, over etching and hydrogen brittleness phenomena are not generated on a metal matrix, irritant smells are avoided, the environment is not polluted, the property is stable, the preparing technology is simple, and the oil removing and rust removing agent can be widely used for oil removing and rust removing of paint sprayed workpieces, powder coated workpieces, electrophoresis workpieces, electroplated workpieces, zinc oxide workpieces and the like.

Description

technical field [0001] The invention relates to an oil and rust remover for metal surface treatment, belonging to the technical field of cleaning agents. Background technique [0002] Rust removal treatment is the basic process before steel surface painting. Rust removal methods can be roughly divided into three categories: mechanical, chemical and electrochemical methods, each of which has its own characteristics and is suitable for different occasions. Among them, the chemical method has a series of advantages such as good effect, high efficiency, simple process operation, and low cost, so it has been widely used in industry. However, the traditional acid treatment method also has obvious defects: that is, the generation of a large amount of hydrogen during the treatment process will cause hydrogen embrittlement of the steel and affect the strength of the steel itself; at the same time, it is easy to form acid mist, which will affect the health of the operator and corrode...

AI Technical Summary

Problems solved by technology

However, the traditional acid treatment method also has obvious defects: that is, the generation of a large amount of hydrogen during the treatment process will cause hydrogen embrittlement of the steel and affect the strength of the steel itself; at the same time, it is easy to form acid mist, which will affect the health of the operator and corrode the surrounding area. equipment and environment

The existing derusting liquid generally has the disadvantages of poor effect and long derusting time

In addition, since the surface processing of metal materials such as iron and steel requires a treatment step of degreasing the surface, this step is usually before chemical derusting, which will increase the process steps of metal surface treatment and increase the cost. The complexity of the process increases the cost and causes more pollution