What are the commonly used metal corrosion inhibitors

Metal corrosion inhibitors are a type of chemical substance that can form a protective or barrier film to prevent metal oxidation and corrosion. Common metal corrosion inhibitors include the following:

Organic phosphates: Organic phosphates can form a fine protective film on the surface of metals, thereby preventing them from being oxidized and corroded by air and water. They have good stability and demulsibility, and are widely used in fields such as oilfield equipment, automotive lubricants, cutting fluids, etc.

Fatty acids or their salts: Fatty acids or their salts have excellent corrosion inhibition performance in alkaline environments. They can form a uniform protective film with the metal surface to prevent oxidation and corrosion of the metal. Commonly used fatty acids or their salts include calcium stearate, sodium hexadecylbenzenesulfonate, etc.

Nitrate: Nitrate can form an amorphous oxide protective film on the metal surface to prevent oxidation and corrosion of the metal. Its main characteristic is sensitivity to solvents with h3 wettability, and it is often used as an anti-corrosion agent in fields such as water cooling systems, boilers, coatings, etc.

Cobalt salts: Cobalt salts can form a uniform and dense oxide layer on the surface of metals, thereby preventing their oxidation while maintaining their conductivity. Due to its good flowability and tensile elongation, cobalt salts are commonly used as corrosion inhibitors for copper and its alloys, as well as treatment solutions before electroplating.

In addition, there are other types of metal corrosion inhibitors, such as ethyl nitrate, benzoate compounds, etc. It is necessary to select appropriate metal corrosion inhibitors based on actual application situations and comply with relevant safety operating procedures and standards.