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An investigation of some Schiff bases as corrosion inhibitors for austenitic chromium–nickel steel in H2SO4

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Abstract

The corrosion inhibition of austenitic chromium–nickel steel by two Schiff bases, N-(1-toluidine)salicylaldimine and N-(2-hydroxyphenyl)salicylaldimine, was investigated in sulphuric acid medium. The effect of concentration and temperature on inhibition properties was determined. It was found that when the concentrations of inhibitor were increased the inhibition efficiencies (η) and surface coverage (θ) increased. Some thermodynamic parameters such as free energy of adsorption, ΔG ∘ ads, and enthalpy, ΔH, were determined for the Schiff bases. Experimental results agree with the Temkin isotherm for N-(1-toluidine)salicylaldimine, but the Langmuir isotherm is more appropriate for N-(2-hydroxyphenyl)salicylaldimine.

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Authors and Affiliations

  1. Department of Physical Chemistry, Ankara University, Beşevler, Ankara, Turkey

    S. Bİlgİç & N. Çaliskan

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  1. S. Bİlgİç
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  2. N. Çaliskan
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Bİlgİç, S., Çaliskan, N. An investigation of some Schiff bases as corrosion inhibitors for austenitic chromium–nickel steel in H2SO4. Journal of Applied Electrochemistry 31, 79–83 (2001). https://doi.org/10.1023/A:1004182329826

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