The Inhibitive Effect of BTA on The Corrosion of Copper Rotating Cylinder Electrode in Oxygenated 0.1M H2SO4 Under Controlled Conditions of Mass Transfer

Abstract

The inhibitive action of benzotrizole (BTA) on the corrosion of copper inoxygenated 0.1M sulfuric acid solution has been investigated using the rotatingcylinder electrode to provide turbulent conditions. Potentiostatic polarizationmeasurements were carried out at different temperatures of 283,288,293 and 298Kand various speeds of rotation, 100,200,300 and 400 rpm.In general, BTA, at concentration of 0.01M, effectively inhibits the corrosion ofcopper in oxygenated 0.1M sulfuric acid solution. Moreover, BTA effectivelyinhibits the anodic dissolution of copper and the cathodic reactions ,i.e., HER andoxygen reduction reaction. Therefore, BTA acts as a mixed inhibitor inoxygenated solutions.The overall percentage of inhibition efficiency is about 98% . This indicates thata Cu-BTA film is developed on the copper electrode surface which about 98% ofthe corrosion rate . The overall inhibition efficiency is neither affected by theturbulent flow rate , nor by the temperature increases.The corrosion rate is temperature dependent only, which indicates that thecorrosion of copper in inhibited oxygenated 0.1M sulfuric acid solutions is underactivation control.

Keywords

• bta inhibitor
• corrosion inhibition of copper using bta
• bta as corrosion inhibitor of copper in acid