Pickling corrosion inhibitor is a chemical additive used in the pickling process of metal surfaces, whose function is to reduce or inhibit the corrosion of metals in acidic environments. Acid pickling corrosion inhibitors are mainly used in processes such as metal surface treatment, rust removal, and cleaning. Common acid pickling corrosion inhibitors include organic phosphates and organic amine salts.
The principle of action of acid pickling corrosion inhibitor is as follows:
Forming a protective film: The chemicals in the acid pickling corrosion inhibitor can form a protective film with corrosion inhibition ability on the metal surface. These protective films can cover the metal surface, reducing direct contact between the metal and acidic media, thereby reducing the corrosion rate of the metal.
Neutralizing acidic substances: The components in acid pickling corrosion inhibitors can undergo neutralization reactions with acidic substances, causing an increase in the pH value of acidic media. Due to the h3 corrosiveness of acidic environments to metals, increasing the pH value can reduce the degree of metal corrosion.
Locking in metal ions: Chemical substances in acid pickling corrosion inhibitors can react with ions dissolved from metals to form stable complexes. These complexes have low solubility, making it difficult for metal ions to dissolve again or form precipitates, thereby reducing metal corrosion.
In summary, acid pickling corrosion inhibitors reduce the corrosion of metals in acidic environments by forming protective films, neutralizing acidic substances, and locking in metal ions. This can protect the metal surface from damage and improve the effectiveness and safety of the pickling process.