期刊
CORROSION SCIENCE
卷 111, 期 -, 页码 675-689出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2016.06.005
关键词
Carbon steel; SEM; XRD; Modeling studies; Pitting corrosion
资金
- Guangxi Natural Science Foundation [2013GXNSFBA 019212]
- Research Fund for the Guangxi Higher Education [2013YB114]
Inhibition of the 1045 carbon steel corrosion by methionine and proline in PCMs solution have been investigated. Electrochemical measurements show that these inhibitors can protect steel against corrosion, with a maximal protection efficiency up to 95.0% by methionine/proline compound inhibitor at molar ratio equal to 5:3. All inhibitors act as anodic-type inhibitor. FESEM, EDS, XRD characterization indicates that the corrosion of steel starts from pitting corrosion of Cl- ion, and gradually evolves into a general corrosion. The NH(4)FePO(4)n center dot H2O, Fe2O3 are the main corrosion products. XPS study confirms that Met and Pro molecule can adsorb on steel surface and form inhibition films. The inhibition mechanism was further investigated through theoretical modeling studies. (C) 2016 Elsevier Ltd. All rights reserved.
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