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| UNDERFILM CORROSION OF METALS AND FAILUREOF ORGANIC COATINGS IN ATMOSPHERE |
| Yongxiang Xv;Chuanwei Yan |
| 北京航空材料研究所 |
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Cite this article:
Yongxiang Xv; Chuanwei Yan. UNDERFILM CORROSION OF METALS AND FAILUREOF ORGANIC COATINGS IN ATMOSPHERE. J Chin Soc Corr Pro, 2002, 22(4): 249-256 .
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Abstract Underfilm corrosion of metals and failure of or gani c coatings in atmosphere are of great interesting and practical meaning.Weatheri ng and underfilm corrosion are the two most important factors which cause failur e of organic coatings.The mechanism of weathering is generally considered to be radical reaction initiated by photon while the mechanism of underfilm corrosion, to be electrochemical reaction.The factors affecting the corrosion and failure i nclude property of the coating,air pollutant,contamination of soluble salts on m etal substrate,surface condition and treating of substrate,and so on.The researc hing approaches are mainly electrochemical methods including DC and AC methods,a nd spectroscopy.Of the electrochemical methods,the electrochemical impedance spe ctroscopy (EIS) is the most important and widely used,and the Kelvin scanning pr obe is a new and promising method.Spectroscopy includes infrared spectroscopy an d Raman spectroscopy.Nowadays it is common to use these methods coordinately and to carry out in situ on-line measurements.The present paper reviews the above a spects.
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Received: 01 November 2000
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