Acid Corrosion Inhibitor
Definition - What does Acid Corrosion Inhibitor mean?
An acid corrosion inhibitor is an organic fluid mainly designed to inhibit the attack of acids on metal surfaces during processes such as:
The composition of a corrosion inhibitor is uniquely formulated for its intended application. Therefore, it is not necessary that a single inhibitor composition work for all applications.
Corrosionpedia explains Acid Corrosion Inhibitor
Inhibitors work in a two-step process:
- 1. The inhibitor diffuses from the bulk solution to the surface of the metal.
2. The inhibitor develops a protective film (passivation layer, a film which prevents access of the corrosive substance) on the metal surface.
The use of inhibitors is influenced by:
- Nature of application
- Acid concentration
One example of an acid corrosion inhibitor that protects various metals and alloys against corrosive attack from organic acids is a mixture of quinoline quaternary ammonium alkyl amine salts, alkyl thioamide, and oxyalkylated phenols in an aqueous alcohol solvent system.
Applications of inhibitors include:
- Cleaning boilers
- Economizer descaling
- Oil well simulations
- Pickling of acid bath
- Cleaning of industrial equipment