Metal corrosion inhibitors are a type of chemical substance used to protect metal surfaces from corrosion and oxidation. Common metal corrosion inhibitors include the following types:
Organic corrosion inhibitors: These corrosion inhibitors are usually organic compounds such as amines, ketones, alcohols, etc. They can form a protective film on the metal surface, reducing the contact between the metal and corrosion factors such as oxygen and water in the environment, thereby reducing the corrosion rate of the metal.
Nitrate corrosion inhibitor: The nitrate ions in nitrate corrosion inhibitors can form a stable oxide or salt film on the metal surface, preventing further oxidation reactions and playing a corrosion inhibiting role. Common nitrate corrosion inhibitors include sodium nitrite and ammonium nitrite.
Phosphate corrosion inhibitor: Phosphate in phosphate corrosion inhibitors can form a phosphate film on the metal surface, playing a role in corrosion and scale inhibition. Common phosphate corrosion inhibitors include sodium phosphate, ammonium phosphate, etc.
Sulfide corrosion inhibitor: Sulfides in sulfide corrosion inhibitors can form a stable sulfide film on the metal surface to prevent further oxidation reactions. Common sulfide corrosion inhibitors include sodium thioacetate and ammonium thioacetate.
Ionic corrosion inhibitors: Ionic corrosion inhibitors can change the potential and environment in the solution by releasing specific ions, thereby hindering the progress of electrochemical corrosion reactions. Common ion corrosion inhibitors include molybdates, selenides, etc.
It is necessary to select appropriate metal corrosion inhibitors based on specific metal types, corrosive environments, and needs, and follow the instructions for correct dosing and operation. At the same time, pay attention to the safe use of metal corrosion inhibitors and follow relevant regulations and recommendations.