Liquid phase plasma derusting solution of steel and derusting process

Abstract

The invention relates to a liquid phase plasma derusting solution of steel and a derusting process. The derusting solution comprises the following components: 1-4wt% of ammonium chloride, 0.5-3wt% of potassium sulfate, and the balance water. The derusting process consists of: a. conducting oil removing treatment on steel to be derusted; b. heating the liquid phase plasma derusting solution, immersing the deoiled steel in the liquid phase plasma derusting solution, introducing a rectifier positive electrode, and connecting a rectifier negative electrode with a negative plate in parallel to conduct derusting; c. taking the steel out after derusting, immersing the steel in deionized water, and then carrying out flushing with deionized water; and d. drying the flushed steel, thus obtaining a derusted steel end product. The liquid phase plasma derusting solution provided in the invention has no damage on operation staff and has no pollution on the environment. The derusting process has the advantages of short derusting time, high efficiency, and improvement of steel surface smoothness, etc.

Description

technical field

[0001] The invention relates to a derusting solution for derusting the surface of steel with liquid plasma plasma and a derusting process using the derusting solution, in particular to a formula of derusting solution for derusting steel using liquid plasma ion technology and its The rust removal process belongs to the technical field of metal anticorrosion or rust removal. Background technique

[0002] Derusting the surface of steel is a necessary process before electroplating and painting of steel. At present, surface derusting methods mainly include mechanical derusting, chemical derusting and electrochemical derusting. Mechanical derusting (including sand blasting, shot blasting, high-pressure jetting, etc.) is likely to cause dust and noise, has low efficiency, has certain damage to steel, and is not suitable for thin-walled steel. Mechanical rust removal basically belongs to dry rust removal. The debris removed, in addition to rust and scale, often has...