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In this study, the effect of a benzotriazole derivative namely 1-hydroxy-7-azabenzotriazole (HOAT) on the inhibition of X60 pipeline steel corrosion in 1 M HCl solution was studied through complementary experimental approaches. Weight loss and electrochemical techniques including potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), were employed to investigate the inhibition behavior of HOAT for steel corrosion. Weight loss analysis showed that inhibition efficiency of HOAT increases with its concentration and decreases with temperature. Electrochemical data provide good support to the weight loss study, and showed that HOAT behaves as a mixed-type corrosion inhibitor. Additionally, Langmuir adsorption model evidenced the adsorption of HOAT on the X60 steel surface via chemisorption mechanism.

The Inhibition Effect of 1-hydroxy-7-azabenzotriazole on X60 Pipeline Steel Corrosion in 1 M HCl Solution