Insight Into the Inhibition Performance of Thiosemicarbazones as Efficient Inhibitors for Copper in Acidic Environment: Combined Experimental and Computational Investigations

The corrosion resistance of copper makes it a popular material. Despite this, the Cu metal is prone to corrosion, and pitting corrosion is frequently observed which leads to application restrictions. In this work, we devolved three efficient corrosion inhibitor types of thiosemicarbazone derivatives namely, (2E,2′E)−2,2′-(1,4-phenylenebis(methanylylidene))bis(N-benzylhydrazine-1-carbothioamide) (BBCT), (2E,2′E)−2,2′-(1,4-phenylenebis(methanylylidene))bis(N-allylhydrazine-1-carbothioamide) (BACT) and (E)−2-(5-azido-2-hydroxybenzylidene)-N-benzylhydrazine-1-carbothioamide (HBCT)that can inhibit the copper corrosion in 0.5 M sulfuric acid. The chemical structure of these materials were confirmed by FT-IR, HRMS,1HNMR and 13CNMR spectroscopic techniques. Moreover, their inhibition performance were evaluated by using various electrochemical techniques i.e. potentiodynamic polarization, AC …