Rinju Youda, H. Nishihara, K. Aramaki
1988
Citations
1
Influential Citations
94
Citations
Quality indicators
Journal
Corrosion Science
Abstract
Corrosion inhibition mechanisms of benzotriazole and its derivatives, 1- and 4-hydroxybenzotriazole for copper in aqueous solutions containing sulphate ions were investigated by SERS spectra and electrochemical polarization method. Inhibition effects became larger in the order of 1-hydroxybenzotriazole < benzotriazole < 4-hydroxybenzotriazole in the neutral solutions. SERS study strongly suggested that 4-hydroxybenzotriazole formed a polymeric surface complex, [Cu(C6H3(OH)N3)]n, of which chemical properties suggested a formation of two- or three-dimensional structure on the surface by means of hydrogen bonding with each other or with water molecules. SERS spectra of chemically adsorbed molecules were obtained in the acid solutions of benzotriazole and 4-hydroxybenzotriazole at the potentials more negative than ca −300 mV(SCE).