期刊
CORROSION SCIENCE
卷 50, 期 6, 页码 1546-1550出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2008.02.013
关键词
inhibition efficiency; plant extracts; phosphoric acid; tannins
The inhibitive action of mangrove tannins, extracted from mangrove barks and phosphoric acid, on pre-rusted steel in a 3.5% NaCl solution was evaluated and the inhibitive efficiency was compared with that of mimosa tannins. From the electrochemical studies, the inhibition efficiency of solutions containing 3.0 g L-1 tannins depended upon the concentration of phosphoric acid added and the pH of the solution. At pH 0.5 and pH 2.0, inhibition was greatest with mangrove and mimosa tannins alone, while at pH 5.5 the addition of phosphoric acid alone gave the highest inhibition. (C) 2008 Elsevier Ltd. All rights reserved.
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