Electrochemical and thermodynamic investigation of benzenamine asudcorrosion inhibitor of austenitic stainless steel (type 304) in hydrochloric acidudsolution

摘要

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