Amines as Corrosion Inhibitors for Copper

✍ Scribed by N. K. Patel; J. Franco

• Publisher: John Wiley and Sons
• Year: 1975
• Tongue: German
• Weight: 190 KB
• Volume: 26
• Category: Article
• ISSN: 0947-5117
• DOI: 10.1002/maco.19750260206

✦ Synopsis

Abstract

The study of the inhibiting effect of certain pyridine and aniline derivatives on the corrosion of copper in persulphate solutions enables the compounds to be arranged in the following series of decreasing inhibiting power; 2,6‐lutidine – 2‐picoline – pyridine – m‐anisidine – p‐phenetidine – aniline.

Inhibition may generally be attributed to the adsorption of organic molecules, nitrogen being an electron donor and becoming attached to the metal surface. Symmetric substitution by methyl groups in the pyridine molecule increases the inhibiting effect. In the case of aniline derivatives m‐anisidine is superior to the other compounds studied. On the base of electrochemical experiments it may be concluded that the reaction is under cathodic control, the cathode being extremely polarized at high current densities.