Evaluation of Several Austenitic Types of Stainless Steel's Chemical Corrosion Resistance

This study aims to evaluate the efficacy of compounds as corrosion inhibitors for stainless steel in hydrochloric acid solution using gravimetric technique and electrochemical measurements. Stainless steel is resistant to corrosion and rust due to its chromium content, which reacts with oxygen in the air to form a protective coating. Passivation is the process of creating a thin layer of chrome oxide when exposed to oxygen, preventing rust. In this investigation, corrosion inhibitors made from benzoic acid derivatives were applied to 316 stainless steel in a 0.5 M hydrochloric acid solution. The outermost parts of the investigated stainless steel samples were examined using scanning electron microscopy and energy dispersive spectroscopy. The study also assessed the fundamental properties of the studied inhibitors using the dynamic molecular simulation method. The best inhibitor concentration for C3 at 291 K was 1.0 102 M, resulting in the highest inhibition efficiency (88%).