Rust remover, preparation process for rust remover and metal surface rust removal method

Abstract

The invention relates to the technical field of rust removal, in particular to a rust remover, a preparation process for a rust remover and a metal surface rust removal method. The rust remover comprises the following components of, in percentage by weight, 20%-60% of complex precipitate, 5%-25% of molybdic acid, 5%-30% of EDTA sodium salt and 5%-30% of gluconic acid, wherein the complex precipitate is prepared by reacting 20%-35% of phytic acid extraction acid, 5%-30% of ascorbic acid and 50%-70% of water in percentage by weight. According to the rust remover, the rust removal effect of traditional inorganic acid can be achieved, a rust remover solution is colorless, odorless and free of volatile substances, the problem of acid mist emission in a traditional process can be fundamentally solved, in addition, the rust removal solution prepared from the rust remover is long in service life and can be repeatedly used, and compared with a traditional acid pickling process, the final discharge amount of waste acid is greatly reduced, and the pollution to the ecological environment and the injury to personnel are reduced.

Description

technical field [0001] The invention relates to the technical field of derusting, in particular to a derusting agent, a preparation process of the derusting agent and a method for derusting metal surfaces. Background technique [0002] The corrosion problem of metal and steel products is becoming more and more prominent. The weight of metal materials and equipment scrapped due to corrosion in the world is about 20% of the annual output of metal. Rust removal is still the primary process step before taking various anti-corrosion measures for metal products. . Rust removal methods mainly include mechanical and chemical methods. The mechanical method has little environmental pollution, but it is difficult to completely remove the rust on parts with complex surface structures and cavities, and chemical methods are still needed for further removal. [0003] In the related technology, the chemical method usually uses inorganic pickling to remove rust, but the cost of the inorgani...

AI Technical Summary

Problems solved by technology

Rust removal methods mainly include mechanical and chemical methods. The mechanical method has little environmental pollution, but it is difficult to completely remove the rust on parts with complex surface structures and cavities, and chemical methods are still needed for further removal.

[0003] In related technologies, inorganic pickling is usually used to remove rust in the chemical method, but the cost of inorganic pickling process is high, and the discharge of residual liquid is large and seriously pollutes the environment. Volatile substances in the process of inorganic pickling will form acid mist pollution, endangering the health of workers

Images