Zairyo-to-Kankyo
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ONLINE ISSN: 1881-9664
PRINT ISSN: 0917-0480

Zairyo-to-Kankyo Vol. 71 (2022), No. 11

  • Decarbonization and Anticorrosion Engineering

    pp. 297-298

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    DOI:10.3323/jcorr.71.297

  • Self-healing Coating by Using Pore of Porous Film Formed on Al Alloy Anodized and Effect of Pore-Widening Treatment on Corrosion Protection

    pp. 300-307

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    DOI:10.3323/jcorr.71.300

    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.
  • Electrochemical Impedance Analysis of Effect of Surrounding Oxygen Concentration on Corrosion Resistance of Type 304 Stainless Steel

    pp. 308-311

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    DOI:10.3323/jcorr.71.308

    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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