Electrochemical corrosion resistance and susceptibility of 12Cr martensitic stainless steel in H2SO4
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Corrosion susceptibility and inhibition of 12Cr martensitic stainless steel was evaluated in different sulphuric acid
and the acid chloride concentrations. Corrosion inhibition of the tested samples in 1M H2SO4 was evaluated using
potassium dichromate of different concentrations. The experiments were performed at ambient temperature using
potentiodynamic polarization measurement. This paper reports the observed electrochemical response of the tested
samples in the strong acid environments. Potentiodynamic polarization resistance technique was used to estimate
the corrosion rate, the polarisation resistance and inhibition of the alloy samples tested. The results obtained
showed some varied magnitude of corrosion susceptibility for the stainless steel at the different H2SO4
concentrations and also in the acid chloride test media. Corrosion inhibition of the tested samples was effectively
achieved using the potassium dichromate inhibitor.
Keywords
T Technology (General), TJ Mechanical engineering and machinery