3 research outputs found
<span style="font-size:11.0pt;mso-bidi-font-size: 10.0pt;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman"; mso-ansi-language:EN-GB;mso-fareast-language:EN-US;mso-bidi-language:AR-SA" lang="EN-GB">Inhibition of corrosion of stainless steel (304 SS) by N-(2-mercaptophenyl)-N<sup>'</sup>-phenyl thiourea in hydrochloric acid</span>
317-322The inhibition effect of N - (2-mercaptophenyl) –N'-
phenyl thiourea (MPTU) on the corrosion of 304 SS in 1 N HCl medium has been
investigated by potentiodynamic polarization, electrochemical impedance
spectroscopy and weight loss methods. The results reveal that MPTU is an
efficient mixed inhibitor with efficiency of greater than 90% at 40ºC. The
adsorption of this inhibitor on the 304 SS surface obeys Temkins adsorption
isotherm, and the inhibition is governed by physisorption mechanism. The influence of parameters like temperature and inhibitor concentration on the corrosion rate
of 304 SS has also been investigated. The thermodynamic parameters deduced for
the adsorption process reveal a strong interaction and spontaneous adsorption
of MPTU on the alloy steel surface