The Transformation of Corrosion Products on Weathering Steel by Visible-Light Illumination under Simulated Marine Atmospheric Condition

被引：8
作者：
Qiu, Ping [1 ]
Chen, Zeshun
Yang, Hongfei
Yang, Lianjie
Luo, Li
Chen, Changfeng
机构：
[1] China Univ Petr, Beijing Key Lab Failure Corros & Protect Oil Gas, Beijing 102249, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2016年 / 11卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Atmospheric corrosion; Corrosion products; Visible-light illumination; PASSIVE FILM; CARBON-STEEL; ULTRAVIOLET-LIGHT; NEUTRAL SOLUTIONS; UV ILLUMINATION; PHOTO-CORROSION; IRON; SPECTROSCOPY; OZONE; IRRADIATION;
D O I：
10.20964/2016.12.76
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
This study has explored the visible-light illumination promoted corrosion behavior of weathering steel in simulated marine atmospheric condition. Open circuit potential measurements supplied a direct insight on this photovoltaic effect. To obtain better understanding on this process, the corresponding surface electronic properties together with its microstructures and chemical composition variations were characterized by Mott-Schottky analysis, AFM, XPS and confocal Raman microspectroscopy. All these combined results revealed that the rusted weathering steel sample collected in the dark displayed n-type photo-response due to the presence of hematite (alpha-Fe2O3), maghemite (gamma-Fe2O3), lepidocrocite (gamma-FeOOH) and goethite (alpha-FeOOH) on its surface. Whereas under illumination, the photogenerated electron-hole pair not only facilitated anodic dissolution and chloride ion adsorption but also leading to hematite to magnetite (Fe3O4) transformation in the metal/corrosion layer interface.
引用
收藏
页码：10498 / 10510
页数：13
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