Copper corrosion inhibition by polyaspartic acid and imidazole |
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Authors: | H P Wang Q Wu C M Li N Gu |
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Affiliation: | College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050016 (P. R. China) |
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Abstract: | This work reveals the corrosion inhibition effect of polyaspartic acid (PASP) and imidazole (IM) on copper in 3 wt% aminosulfonic acid acting as mixed‐type inhibitor of predominant cathodic effect. Potentiodynamic polarization and electrochemical impedance spectroscopy work prove that at 30 °C, 1.0 g/L PASP alone gave the best inhibitory effect of 89.8%; the inhibition efficiency could reach up to 95.4% when combining PASP and IM at the same ratio in total of 1.0 g/L. The anti‐corrosion mechanism of PASP and IM on copper is proposed from the characteristic molecular structures of these two chemicals. |
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Keywords: | acid corrosion copper EIS imidazole inhibition polarization polyaspartic acid |
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