Environment-friendly metal surface degreasing and derusting agent

Abstract

The invention discloses an environment-friendly metal surface degreasing and derusting agent. The degreasing and derusting agent is composed of 8-12 parts by weight of hydrochloric acid, 5-9 parts byweight of boric acid, 3-5 parts by weight of citric acid, 3-5 parts by weight of tartaric acid, 2-4 parts by weight of a nonionic surfactant, 2-4 parts by weight of an anionic surfactant, 2-5 parts byweight of disodium ethylenediaminetetraacetate, 2-5 parts by weight of sodium alginate, 1-2 parts by weight of thiourea, 1-2 parts by weight of urotropine, 2-3 parts by weight of an organosilicone defoamer, 3-5 parts by weight of benzotriazole, 2-5 parts by weight of polyethylene glycol oleate and 80-120 parts by weight of water. The degreasing and derusting agent can simultaneously remove oil and rust on the metal surface, does not contain phosphoric acid, does not produce phosphorus-containing substances polluting the water source after use, is safe and environment-friendly, does not produce excessive corrosion and hydrogen embrittlement on the metal substrate, does not produce irritating odor, has stable properties, is prepared through simple processes and has a wide application range.

Description

technical field [0001] The invention relates to an environment-friendly metal surface oil and rust remover, which belongs to the technical field of cleaning agents. Background technique [0002] Rust removal treatment is the basic process before metal surface painting. The existing 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 ...

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

[0003] 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