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CHA As Corrosion Inhibitor
Amines have a good inhibition effect on ferrous metals, but most studies focus on the inhibition effect of certain long-chain fatty amines in acidic media. Generally, the carbon chain length is between 8 and 12 carbon, and the corrosion resistance is good, but the solubility of these amines in water is poor. In the review of corrosion inhibitors, it was mentioned that cyclohexylamine and piperidine can inhibit the pitting corrosion of 304 stainless steel in boiling solution of 4mol/L NaCl.
Cyclohexylamine (CHA) is a primary amine, can be miscible with water with infinite ratio, the molecule is small, easy to adsorb on the metal surface, its shielding effect is better than long chain primary amine and secondary amine, so it can effectively prevent the invasion of corrosive ions, thereby improving corrosion resistance, especially the ability to inhibit corrosion.
The corrosion inhibition of 304 stainless steel by cyclohexylamine in sodium chloride medium was studied in detail.
