Abstract
The corrosion resistance behaviour of 12Cr martensitic stainless steel was evaluated in different concentrations of H3PO4 and H3PO4 + NaCl. Corrosion inhibition of the tested samples in 1M H3PO4 was also evaluated using potassium dichromate. The experiments were performed at ambient temperature of 27∘ using potentiodynamic polarization measurements. Different concentrations of the test media were used with sodium chloride addition. Tafel and polarization resistance techniques were used to estimate the corrosion rate, the polarisation resistance and inhibition of the alloy samples tested. The results showed some magnitude of corrosion susceptibility for the stainless steel at higher H3PO4 concentrations and also in the acid chloride test media. Effective corrosion inhibition was also exhibited on the tested samples.
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