Electrochemical influence of Aminobenzene on the pitting corrosion behaviour of Type 304 stainless steel in dilute sulphuric acid
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J. Mater. Environ. Sci
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The electrochemical influence of aminobenzene (AMB) concentrations on the pitting corrosion resistance of austenitic stainless steel type 304 in 3M sulphuric solutions with 3.5% sodium chloride addition was evaluated through potentiodynamicpolarization technique. The pitting potential, passivation potential, passivation range, nucleation resistance and passivation capacity were analyzed with respect to specific aminobenzene concentrations. Under impressed potential difference the stainless steels in acid solution acquired a passive state, with breakdown at the transpassive region (pitting potential), however this was greatly increased to higher values with aminobenzene additioncausing significant increase in the passivation range and potentials greatly higher than the value that necessitates pitting in the acid media due to enhanced corrosion resistance of the stainless steel through formation of protective film of aminobenzene molecules. The results obtained establish the dynamic relationship and interaction between the aminobenzenecation concentration and electrochemical parameters in the corrosion behavior of the stainless steel at ambient temperature of 25 oC.
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TA Engineering (General). Civil engineering (General), TJ Mechanical engineering and machinery, TP Chemical technology