Electrochemical study of effect of the concentration of azole derivatives on corrosion behavior of stainless steel in H2SO4

- Benzotriazole and benzothiazole were used to inhibit corrosion of stainless steel.
- Effect of the azole derivative concentration on stainless steel corrosion was studied.
- Effectiveness of the inhibitors in 1 M H2SO4 was analyzed using electrochemical noise.
- Noise resistance data was used to study adsorption isotherm of the inhibitors.
- A good trend correlation between EIS and electrochemical noise data was found.