Rust remover and preparation method thereof

Abstract

The invention discloses a rust remover and a preparation method thereof. The rust remover is prepared from the following components in percentage by mass: 60 to 80 percent of organic acid, 19 to 39 percent of inorganic acid and 0.8 to 3 percent of corrosion inhibitor, wherein the organic acid is one or more than two kinds of tartaric acid, citric acid, oxalic acid and trichloroacetic acid; the inorganic acid is one or more than two kinds of sulfamic acid, phosphorous acid and ammonium acid fluoride; and the corrosion inhibitor is benzotrizaole or/and sodium dihydrogen phosphate. According to the rust remover disclosed by the invention, the use of hydrochloric acid or sulfuric acid is completely avoided; no acid mist during rust removal is generated, the corrosion to equipment in a workshop is avoided and the labor environment is improved; meanwhile, the corrosion inhibitor is weaker in acidity, the over corrosion to workpieces is avoided and the condition that the skin of an operator is severely corroded is prevented; in addition, after a certain amount of workpieces are treated, the rust removing efficiency is reduced; and by continuously adding the rust remover disclosed by the invention, the rust removing efficiency can be restored, i.e., a rust removing bath solution disclosed by the invention can be conveniently and repeatedly used.

Description

technical field [0001] The invention relates to an efficient, economical, safe and environment-friendly derusting agent and a preparation method thereof, belonging to the field of chemical derusting for metal surface treatment. Background technique [0002] Rust removal is a very important process in the processing of metal workpieces. At present, hydrochloric acid and sulfuric acid are generally used for rust removal. And the workpiece, and pollute the environment, endanger the health of operators, and have special requirements for packaging materials, transportation vehicles, and storage sites. In addition, most of the current rust removers inevitably use hydrochloric acid or sulfuric acid, which will inevitably generate smoke during storage, preparation or use, causing environmental pollution or corrosion of equipment. Contents of the invention [0003] The object of the present invention is to provide a novel rust remover and a preparation method thereof for the defic...

AI Technical Summary

Problems solved by technology

[0002] Rust removal is a very important process in the processing of metal workpieces. At present, hydrochloric acid and sulfuric acid are generally used for rust removal. and workpieces, pollute the environment, endanger the health of operators, and have special requirements for packaging materials, transportation vehicles, and storage sites

In addition, most of the current rust removers inevitably use hydrochloric acid or sulfuric acid, which will inevitably produce smoke during storage, preparation or use, causing environmental pollution or corrosion to equipment