Phosphoric acid is a common corrosion inhibitor with excellent corrosion performance, suitable for many different types of metals and alloys. The following are some common phosphoric acid corrosion inhibitors:
Phosphate: Phosphate is a type of compound containing phosphate ions, including sodium dihydrogen phosphate, trisodium phosphate, iron phosphate, etc. These salts can form a protective film to prevent metal surfaces from coming into contact with the external environment and causing corrosion.
Organic phosphate: Organic phosphate is a type of corrosion inhibitor containing organic phosphate groups that can be adsorbed on metal surfaces, forming a thin protective film. For example, triethanolamine phosphate and dibutyl phthalate.
Polyhydroxy compounds: Polyhydroxy compounds, such as agar, colloidal silicon, etc., can form a protective film to prevent metal surfaces from coming into contact with the external environment and causing corrosion.
Organic acid phosphate: Organic acid phosphate is a compound composed of organic acids and phosphate ions, such as adipic acid phosphate, benzyl phosphate, etc. These compounds can be adsorbed on the metal surface, forming a protective film.
Phosphate esters: Phosphate esters are a class of organic compounds containing phosphate groups, such as trimethyl phosphate esters, tripropyl phosphate esters, etc. These compounds can coordinate with the metal surface to form a protective film.
In summary, phosphoric acid corrosion inhibitors have a wide range of applications and excellent corrosion inhibition performance, and have important applications in fields such as electroplating, cooling water treatment, and boiler water supply systems. Choosing a suitable phosphate corrosion inhibitor should consider various factors such as metal type, working environment, and usage conditions.