Organic sulphur-containing compounds as corrosion inhibitors for mild steel in acidic media: correlation between inhibition efficiency and chemical structure

Ozcan M. , Dehri I. , Erbil M.

APPLIED SURFACE SCIENCE, vol.236, pp.155-164, 2004 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 236
  • Publication Date: 2004
  • Doi Number: 10.1016/j.apsusc.2004.04.017
  • Title of Journal : APPLIED SURFACE SCIENCE
  • Page Numbers: pp.155-164


The effects of thiourea (TU), methylthiourea (MTU) and phenylthiourea (PTU) on the corrosion behaviour of mild steel in 0.1 M solution of H2SO4 have been investigated in relation to the concentration of thioamides (-CS-NH2). These compounds are all similar on one side of the thiocarbonly group and different on the other. The experimental data obtained using the techniques of R-p (polarisation resistance) and EIS (electrochemical impedance spectroscopy). The results showed that these compounds revaled a good corrosion inhibition, phenylthiourea being the most efficient and thiourea the least.