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SYNERGISTIC EFFECT OF HALIDE IONS ON THE CORROSION INHIBITION OF MILD STEEL IN SULPHURIC ACID USING METHYL, N-METHYL ETHYL AND ETHYL SUBSTITUTED γ-2,c-6-DIPHENYL PIPERIDIN-4-ONE SEMICARBAZONES

Author

Listed:
  • V. SHANMUGA PRIYA

    (Department of Chemistry, Government Arts College, Salem, Tamil Nadu, India)

  • C. UMA RANI

    (Department of Chemistry, Government Arts College, Salem, Tamil Nadu, India)

  • S. VELRANI

    (#x2020;Department of Chemistry, Kamaraj College, Tuticorin, Tamil Nadu, India)

Abstract

The synergistic effect of halide ions such as KCl, KBr and KI on the corrosion inhibition of mild steel in 1 N sulphuric acid by γ-2,c-6-diphenyl-t-3-methyl piperdin-4-ones with semicarbazone (01SC), γ-2,c-6-diphenyl-N-methyl-t-3-ethyl piperdin-4-ones with semicarbazone (02SC) and 2,6-diphenyl-t-3-ethyl piperdin-4-one with semicarbazone (03SC) has been examined by weight loss method, potentiodynamic polarization measurements and electrochemical AC impedance spectroscopy. Results show that substituted γ-2,c-6-diphenyl piperidin-4-ones with semicarbazone act as the perfect corrosion inhibitors and their inhibition efficiency increases with the addition of halide ions. The inhibitor (01SC) shows the inhibition efficiency of 78.28% (0.2mM) by using a weight loss method. The influence of I−, Br− and Cl− anions raises the inhibition efficiency of the substituted 2,6-diphenyl piperidin-4-ones with semicarbazone due to the synergistic effect. The synergistic effect of halide ions was formed in the following order: KI > KBr > KCl.

Suggested Citation

  • V. Shanmuga Priya & C. Uma Rani & S. Velrani, 2018. "SYNERGISTIC EFFECT OF HALIDE IONS ON THE CORROSION INHIBITION OF MILD STEEL IN SULPHURIC ACID USING METHYL, N-METHYL ETHYL AND ETHYL SUBSTITUTED γ-2,c-6-DIPHENYL PIPERIDIN-4-ONE SEMICARBAZONES," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 25(02), pages 1-9, February.
    • Handle: RePEc:wsi:srlxxx:v:25:y:2018:i:02:n:s0218625x18500506
    DOI: 10.1142/S0218625X18500506
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