High-efficiency solid pickling inhibitor for many metals

Abstract

The invention belongs to the technical field of fine chemistry industry, and in particular relates to a high-efficiency solid pickling inhibitor for many kinds of metal of the field of industrial cleaning. The inhibitor is prepared from the following components by weight percent through crushing and mixing: 50 to 80% of rodine, 10 to 20% of hexamethylenetetramine, 10 to 20% of thiocarbamide, 5 to 10% of benzene azimide and 1 to 5% of surfactant. The invention has the advantages of synergistic effect, low use level and portability, and is suitable for many metals or alloys, including carbon steel, stainless steel, copper, zinc, aluminum, titanium and the like, thereby having high practical value.

Description

Technical field: [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a variety of metal high-efficiency solid pickling corrosion inhibitors in the field of industrial cleaning. Background technique: [0002] Pickling corrosion inhibitors are widely used in the chemical cleaning process of industrial equipment, boilers, heat exchangers, metal pickling and derusting and acidizing oil recovery and other processes. Commonly used acids for pickling include organic acids, citric acid, sulfamic acid, etc. and inorganic acids: hydrochloric acid, sulfuric acid, phosphoric acid, hydrofluoric acid, etc. These acids have a corrosive effect on metal equipment during the cleaning process, especially the corrosion of inorganic acids is more serious. [0003] The research on pickling corrosion inhibitors in my country began in the 1950s, and from the mid-1970s to the end of the 1980s, pickling corrosion inhibitors in my country developed rapi...

AI Technical Summary

Problems solved by technology

[0004] However, although there are a wide variety of corrosion inhibitors commonly used at present, their effects vary greatly, and professional selection is often required, and the dosage is large.