Inhibition Effects of Amides on the Corrosion of Copper in 1.0 M HCl: Theoretical and Experimental Studies

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ZOR S., SARAÇOĞLU M., KANDEMİRLİ F., Arslan T.

CORROSION, vol.67, no.12, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 67 Issue: 12
  • Publication Date: 2011
  • Doi Number: 10.5006/1.3665357
  • Journal Name: CORROSION
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: acid solutions, copper, corrosion, polarization, MILD-STEEL CORROSION, HYDROCHLORIC-ACID SOLUTIONS, SODIUM-CHLORIDE SOLUTIONS, AERATED SULFURIC-ACID, 0.5 M H2SO4, ANODIC-DISSOLUTION, NACL SOLUTIONS, SCHIFF-BASES, FILMS, MEDIA
  • Kocaeli University Affiliated: Yes

Abstract

The corrosion inhibition effects of benzamide (BA) and 4-aminobenzenesulfonamide (ABSA) for copper in 1.0 M hydrochloric acid (HCl) solution were investigated using potentiodynamic polarization, cyclic voltammetry (CV), and potentiostatic current-time curves. The Langmuir adsorption isotherms of the inhibitors were used to explain the adsorption behavior. In addition, surface analysis of copper was investigated using scanning electron microscopy (SEM). The results showed that the inhibition efficiency of ABSA was much better than those of BA. The theoretical study on the corrosion inhibition efficiencies for neutral and protonated forms of the BA and ABSA molecules were performed using density functional theory (DFT) and MP2 method in gas and water phases.