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Synergistic inhibition effect of N ‐(furan‐2‐ylmethyl)‐7 H ‐purin‐6‐amine and iodide ion for mild steel corrosion in 1 mol/L HCl
Author(s) -
Zhang Weiwei,
Li HuiJing,
Wang Ankai,
Ma Chengshuai,
Wang Zhangxiao,
Zhang Hao,
Wu YanChao
Publication year - 2020
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201911146
Subject(s) - corrosion , electrochemistry , amine gas treating , scanning electron microscope , furan , iodide , chemistry , nuclear chemistry , ion , inorganic chemistry , materials science , organic chemistry , electrode , composite material
The synergistic inhibition effect of N ‐(furan‐2‐ylmethyl)‐7 H ‐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.