Bulletin of the Korean Chemical Society

  • 제21권11호
  • /
  • Pages.1085-1089
  • /
  • 2000
  • /
  • 0253-2964(pISSN)
  • /
  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
권호 표지
DOI QR코드

DOI QR Code

2-Hydroxyacetophenone-aroyl Hydrazone Derivatives as Corrosion Inhibitors for Copper Dissolution in Nitric Acid Solution

  • A. S. Fouda ;
  • M. M. Gouda ;
  • S. I. Abd El-Rahman
  • 발행 : 20001100
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

The effect of 2-hydroxyacetophenone-aroyl hydrazone derivatives on the inhibition of copper corrosion in 3N nitric acid solution at 303 K was investigated by galvanostatic polarization and thermometric techniques. A significant decrease in the cor rosion rate of copper was observed in the presence of the investigated compounds. The corrosion rate was found to depend on the nature and concentrations of the inhibitors. The degree of surface coverage of the adsorbed inhibitors is determined from polarization measurements, and it was found that the results obey the Frumkin adsorption isotherm. The inhibitors acted as mixed-type inhibitors, but the cathode is more polarized. The relative inhibitive efficiency of these compounds has been explained on the basis of structure dependent electron donor properties of the inhibitors and the nature of the metal-inhibitor interaction at the surface. Also, some thermodynamic data for the adsorption process ( ΔGa* and f ) are calculated and discussed.

키워드

참고문헌

  1. Metallic Corrosion Inhibitors Putilova, I. N.;Balezin, S. A.;Barannik, V. P.
  2. Comprehensive Treatise on Inorganic and Theoretical Chemistry Veley, V. H.;Mellor, J. W.(Ed.)
  3. Br. Corros. J. v.19 Subramanyan, N. C.;Sheshadria, B. S.;Mayanna, S. M.
  4. J. Electrochem. Soc. v.124 Ahmed, M. F.;Mayanna, S. M.;Pushpanaden, F.
  5. Br. Corros. J. v.12 Rudresh, H. B.;Mayanna, S. M.
  6. Anti Corros. Methods Mater. v.23 no.8 Siddagangappa, S.; Mayanna, S. M.; Pushpanaden, F.
  7. Werkst. Korros. v.39 Fouda, A. S.;Mohamed, A. K.
  8. Material and Corrosion v.46 Abdel Maksoud, S. M.;El-Shafie, A. A.;Mostafa, H. A.;Fouda, A. S.
  9. J. Electrochem. Soc. Ind. v.39 Fouda, A. S.;Mohamed, A. K.
  10. Corros. Sci. v.5 Aziz, K.;Shams El-Din, A. M.
  11. Metall. v.14 Mylius, F. Z.
  12. Corrosion NACE v.12 Gatos, H. S.
  13. Corros. Sci. v.16 Abo El-Khair, M. B.;Abdel Hamed, I. A.
  14. J. Phys. Chem. v.116 Frumkin, A. N.
  15. Corros. Sci. v.10 Saleh, R. M.; Shams El-Din, A. M.
  16. Qatar Univ. Sci. J. v.12 Fouda, A. S.;Gomah, S. A.;Moussa, M. N.
  17. Corros. Prev. Coutrol. no.June Mostafa, A. B.
  18. Surf. Coating Technol. v.6 Rudresh, H. B.;Mayanna, S. M.
  19. Corros. Sci. v.26 Fouda, A. S.;Moussa, M. N.;Taha, F. I.;Elneanaa, A. I.
  20. Physical Organic Chemistry Hammett, L. P.