Chemical substances or compounds that can prevent or slow down the corrosion of materials when present in the environment (medium) in appropriate concentrations and forms, so corrosion inhibitors can also be called corrosion inhibitors. Its dosage is very small (0.1% ~ 1%), but the effect is significant. This method of protecting metal is called corrosion inhibitor protection. Corrosion inhibitors are used in neutral media (boiler water, circulating cooling water), acidic media (hydrochloric acid to remove scale, acid leaching solutions for rust removal of plated parts before electroplating) and gaseous media (vapor phase corrosion inhibitors).
