Types of corrosion inhibitors

Corrosion inhibitors are a type of chemical substance used to reduce the degree of corrosion of metal materials in corrosive media. Different corrosion inhibitors are suitable for different corrosive environments and metal types. The following are some common types of corrosion inhibitors:

Organic phosphate corrosion inhibitors, such as phosphoric acid, oxalic acid, amino trimethylphosphonic acid (ATMP), etc. They reduce the contact between metals and corrosive media by forming complexes with metal surfaces or forming protective films.

Corrosion inhibiting amine compounds: including cyclohexylamine, aniline, etc. These compounds can form a corrosion inhibitor layer on the metal surface, reducing the electrochemical reaction rate of the metal and thus reducing corrosion.

Adsorption type corrosion inhibitors: such as sulfates, alkali metal salts, etc. They can adsorb on the metal surface to form a dense protective film, preventing further contact between corrosive media and the metal.

Organic corrosion inhibitors: such as certain organic acids, organic amines, etc. These compounds can form a corrosion inhibitor layer with metals, reducing their corrosion rate.

Corrosion inhibiting polymers: such as polyvinyl pyrrolidone (PVP), sodium polyacrylate (PAA), etc. These polymers can adsorb on the metal surface to form a protective film, reducing the occurrence of corrosion.

It is necessary to select appropriate corrosion inhibitors based on the specific corrosive medium and metal type, and use them correctly according to the product instructions. In addition, the use of corrosion inhibitors should also comply with relevant safety and environmental regulations and standards to ensure their safety and environmental friendliness.