Decarbonization and Anticorrosion Engineering
Yoshinori Nakayama
pp. 297-298
DOI:
10.3323/jcorr.71.297Backnumber
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Yoshinori Nakayama
pp. 297-298
DOI:
10.3323/jcorr.71.297Rin Takada, Kota Hirasawa, Makoto Chiba
pp. 300-307
DOI:
10.3323/jcorr.71.300Abstract
In this study, advanced coating with self-healing property for corrosion protection of Al alloy was developed. This coating can be formed on Al alloy anodized, and pores in porous type of anodic oxide film formed on Al substrate was filled by a healing agent of coating. It is clear that the defect formed by mechanical damage was covered by self-healing structure, when this coating formed on Al surface was damaged. And corrosion protection also keep high if this coating was damaged.
Kotaro Doi, Hiroyasu Asano, Yoshinao Hoshi, Sachiko Hiromoto
pp. 308-311
DOI:
10.3323/jcorr.71.308Abstract
The effect of surrounding oxygen concentration on the passive film growth and the initiation and the progress of localized corrosion of type304 stainless steel under water film containing chloride ions was investigated by electrochemical impedance spectroscopy. The passive film became thicker, and the film resistance became smaller as oxygen concentration increased. After passive film breakdown, the increase in the oxygen concentration enhanced the oxygen reduction reaction. As a result, the dissolution of the metal substrate was more dominant than repassivation, and the progress of the localized corrosion accelerated.
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