期刊
CORROSION SCIENCE
卷 165, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2019.108381
关键词
Bronze; EIS; Scanning electrochemical microscopy; Potentiodynamic polarization; Adsorption isotherms; Corrosion inhibition
资金
- Spanish Ministry of Economy and Competitiveness (MINECO, Madrid)
- European Regional Development Fund [CTQ2016-80522-P]
- Erasmus + Staff Mobility for Training Programme (2018)
- Subprogram 1.2 - Institutional Performance Projects for Financing the Excellence in CDI [37PFE/06.11.2018]
Horse-chestnut ethanolic extract was tested as potential corrosion inhibitor of bronze in simulated acid rain. The extract was analysed by FTIR, GC-MS and HPLC-PDA, and its anti-corrosion behaviour studied using a multiscale electrochemical approach by polarization curves, EIS and scanning electrochemical microscopy, along with SEM-EDS. 94 % inhibition efficiency was attained by developing a surface physisorbed film. A novel methodology for kinetic evaluation of dynamic adsorption of inhibitive species on metal surface is proposed using SECM, achieving good agreement with results from conventional electrochemical techniques. Excellent adsorption-desorption kinetic constants (k(a) = 0.102 s(-1) mol(-1) L; k(d) = 3.33 x 10(-5) s(-1)) were determined.
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