Electrochemical corrosion resistance and inhibition behaviour of martensiticudstainless steel in hydrochloric acid

摘要

Corrosion resistance behaviour of 12Cr martensitic stainless steel was evaluated in different hydrochloric acid andudthe acid chloride concentrations. Corrosion inhibition of the tested samples in 1M HCl was also evaluated usingudpotassium dichromate. The experiments were performed at ambient temperature using potentiodynamic polarizationudmeasurement. This paper reports the observed electrochemical response of the experimental tests. Differentudconcentrations of the test media were used with sodium chloride addition. Tafel and polarization resistanceudtechniques were used to estimate the corrosion rate, the polarisation resistance and inhibition of the alloy samplesudtested. The results obtained showed some magnitude of corrosion susceptibility for the stainless steel at higher HCludconcentrations and also in the acid chloride test media. Effective corrosion inhibition was also exhibited on theudtested samples