Application of scanning electrochemical microscope in the study of corrosion of metals |
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Authors: | Lin Niu Yuehua Yin Weikuan Guo Min Lu Ruijie Qin Shenhao Chen |
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Affiliation: | (1) School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China;(2) Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China |
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Abstract: | Scanning electrochemical microscope (SECM) has become a very useful and powerful technique for probing a variety of electrochemical
reactions in corrosion process due to its high spatial resolution and electrochemical sensitivity to characterize the topography
and redox activities of the metal/electrolyte solution interface. Its capability for the direct identification of chemical
species in localized corrosion processes with high spatial resolution would be more advantageous compared to other local probe
techniques with only morphological characterization. In this review, the applications of the SECM in the study of early stages
of localized corrosion, electroactive defect sites in passive films, local initiation of pits, degradation of coating properties
on steels, and some combined methods through SECM integrated with other techniques have been summarized and commented. Finally,
the optimization for SECM’s experiment design and operation as well as foreseeable application range has been proposed. |
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