Electrochemical and thermodynamic investigation of benzenamine as corrosion inhibitor of austenitic stainless steel (type 304) in hydrochloric acid solution

The inhibiting action of benzenamine (BEZ) on the corrosion of type 304 stainless steel in 3M hydrochloric acid was investigated through electrochemical tests. Results show BEZ to be an excellent inhibitor. The compound was observed to be of mixed type in action. Inhibition efficiency increased with increase in BEZ concentration giving an optimal value of 96.14% at 6.25% BEZ concentration from weight loss and 88.7% at 5% BEZ concentration from polarization tests. X-Ray diffractometry revealed the absence of corrosion products. Statistical analysis using ANOVA showed the statistical significance of BEZ concentration on its inhibition efficiency performance. The compound obeyed Langmuir adsorption isotherm