Rust remover suitable for precise steel parts, and rust removal process thereof

Abstract

The invention discloses a rust remover suitable for precise steel parts, and a rust removal process thereof, and relates to the field of mechanical technologies. The rust remover is composed of the following raw materials in percentage by mass: 10-20% of chromic anhydride, 0.8-1.5% of sulfuric acid, 13-18% of phosphoric acid and 60.5-76.2% of water. The rust remover disclosed by the invention is prepared through mixing the abovementioned raw materials in mass proportions, and the prepared rust remover is high in rust removal capacity, low in environmental pollution and suitable for rust removal for the precise steel parts; and a preparation method for the rust remover disclosed by the invention is simple in process parameters and high in preparation efficiency.

Description

technical field [0001] The invention relates to the technical field of machinery, in particular to a derusting agent suitable for steel precision parts and a derusting process suitable for the derusting agent for steel precision parts. Background technique [0002] Metal materials are prone to rust when placed outdoors or in the open air, which not only affects the appearance quality, but also affects the normal progress of painting, bonding and other processes. If not handled in time, the materials will be scrapped and unnecessary economic losses will be caused. [0003] Traditional chemical rust removal usually uses strong acid, which can chemically react with rust and metal oxides to generate soluble salts, so as to achieve the purpose of rust removal. At the same time of rust removal, acid can react with base metal to release hydrogen, hydrogen It can exert pressure on rust and insoluble scale, which is beneficial to their peeling and reduction of high-valent iron, and a...

AI Technical Summary

Problems solved by technology

However, the traditional acid solution 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, which will cause the mechanical properties of the metal to decline and affect the strength of the steel itself; at the same time, it is easy to form acid mist, affecting The health of the operator and the surrounding equipment and environment are corroded; the consumption of acid is also large, which increases the cost of treatment; this type of acid will cause over-corrosion of steel

In addition, the residues produced in large quantities need to be discharged frequently, which not only seriously corrodes industrial pipelines, but also pollutes the soil and the environment.