Journal
CORROSION SCIENCE
Volume 65, Issue -, Pages 13-25Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2012.07.022
Keywords
Mild steel; Weight loss; EIS; Acid inhibition
Funding
- Science & Technology Administration of Sichuan Province [2009JY0062]
- National Natural Science Foundation of China [21176201]
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N-alkyl-4-(4-hydroxybut-2-ynyl) pyridinium bromides (designated as P-n) have been synthesized and characterized. The corrosion inhibition efficiency of P-n on X70 steel in 5 M HCl was evaluated via weight loss and electrochemical methods. The results indicated that the combination of good inhibition moieties, such as alkylpyridinium and acetylenic alcohol, promoted P-n to be efficient inhibitors. Although the inhibitory efficiency of P-n decreased with elevating temperature, less reduction of the efficiency was found for the P-n with longer chain. P-n molecules were adsorbed on X70 surface by replacing water, which blocked the active sites and elevated the energy barrier for corrosion. (c) 2012 Elsevier Ltd. All rights reserved.
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