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The synergistic inhibition effect of N‐(furan‐2‐ylmethyl)‐7H‐purin‐6‐amine (FYPA) and iodide ion on mild steel corrosion in 1 mol/L HCl was investigated using weight‐loss tests, electrochemical techniques, and surface analysis. The experiments revealed that the FYPA + KI mixture was a temperature‐dependent inhibitor, which strongly inhibited the corrosion of mild steel compared with FYPA. Based on electrochemical results, FYPA and FYPA + KI behaved as mixed‐type inhibitors, and their inhibition efficiencies were 73.66% and 96.01%, respectively. The calculated synergistic parameter value was larger than unity, illustrating that enhancement of inhibition in the presence of KI could be a result of synergistic action. Surface analysis techniques (scanning electron microscope/scanning electrochemical microscope) confirmed the presence of additives on the studied mild steel surface. A plausible mechanism of corrosion inhibition was proposed.

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The carbon coated SnOx with adjustable composition and coating thickness was firstly prepared. The initial coulombic efficiency and cycle stability were improved by chemical prelithiation and the full-cell showed better cycling and rate performance.