Journal of Applied Electrochemistry

, Volume 33, Issue 2, pp 171–177

Inhibition of acid corrosion of steel using cetylpyridinium chloride

  • A.A. Atia
  • M.M. Saleh

DOI: 10.1023/A:1024083117949

Cite this article as:
Atia, A. & Saleh, M. Journal of Applied Electrochemistry (2003) 33: 171. doi:10.1023/A:1024083117949


The cationic surfactant cetylpyridinium chloride (CPC) showed high inhibition efficiency for the corrosion of low carbon steel in 1 M H2SO4. Electrochemical measurements were dedicated to test the performance of CPC at different concentrations and temperatures. CPC has a significant inhibiting effect on the corrosion of steel and protection efficiencies up to 97% were measured. The inhibitor shifted the corrosion potential in the cathodic direction. It was found that adsorption is consistent with the Bockris–Swinkels isotherm in the studied temperature range (30–60 °C). The negative values of the free energy of adsorption and the decrease in apparent activation energy in the presence of the inhibitor suggest chemisorption of the CPC molecule on the steel surface.

cationic cetylpyridinium chloride corrosion steel surfactant 

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • A.A. Atia
    • 1
  • M.M. Saleh
    • 1
  1. 1.Chemistry Department, Faculty of ScienceMenofia UniversityEgypt