材料と環境 Vol. 71 (2022), No. 11
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材料と環境 Vol. 71 (2022), No. 11
ポーラス皮膜を塗膜修復剤コンテナとした自己修復性電着塗膜とこの耐食性に及ぼすポアワイドニング処理の影響
髙田 りん, 平澤 晃大, 千葉 誠
pp. 300-307
DOI:
10.3323/jcorr.71.300抄録
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.
環境中の酸素濃度がType304ステンレス鋼の耐食性に及ぼす影響の電気化学インピーダンス解析
土井 康太郎, 浅野 弘靖, 星 芳直, 廣本 祥子
pp. 308-311
DOI:
10.3323/jcorr.71.308抄録
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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