Steel surface compact oxide layer scavenging agent

Abstract

The invention discloses a steel surface compact oxide layer scavenging agent, which is composed of mixed acid, oxidizer, surfactant, corrosion inhibitor, anti-rust agent and pure water with the weightpercent of the components as follows: 5-20% of H2SO4, 10-30% of HCl, 0.5-3% of oxalic acid, 0.25-3.5% of oxidizer, 1-3% of surfactant, 0.25-3% of corrosion inhibitor, 1-3% of anti-rust agent and remainder of water; the scavenging agent is colorless transparent, has no pungent smell, has obvious effect in scavenging steel surface compact oxide layer and rust, and is sucked on pure steel surface compact to form a film, the contact between the scavenging agent and metal can be isolated, the over-corrosion of steel and hydrogen embrittlement can be avoided; the invention has low cost, small investment, simplified technique and good effect in steel surface treatment, and needs no temperature control equipment.

Description

technical field [0001] The invention relates to the treatment of iron and steel surfaces, in particular to an agent for removing dense oxide layer on the iron and steel surface. Background technique [0002] Steel surface treatment usually adopts cleaning, brushing and other methods. It is generally better to remove the rust on the metal surface, but it is not thorough to remove the oxide scale. Long, high temperature control requirements, unsatisfactory treatment results, unclean removal of oxide skin, not up to the quality standard, in order to effectively remove the dense oxide layer of steel, currently large components are treated with "sand blasting", but investment in equipment, workshops, etc. It needs hundreds of thousands to more than one million yuan, water, electricity, air compressors, laying air ducts, and steel sand injection. The air pollution is serious, labor protection requirements are strict, the cost is high, and the labor intensity is high. Contents of...

AI Technical Summary

Problems solved by technology

[0002] Steel surface treatment usually adopts cleaning, brushing and other methods. It is generally better to remove the rust on the metal surface, but it is not thorough to remove the oxide scale. Long, high temperature control requirements, unsatisfactory treatment results, unclean removal of oxide skin, not up to the quality standard, in order to effectively remove the dense oxide layer of steel, currently large components are treated with "sand blasting", but investment in equipment, workshops, etc. It needs hundreds of thousands to more than one million yuan, water, electricity, air compressors, laying air ducts, steel sand injection, serious air pollution, strict labor protection requirements, high cost, and high labor intensity