Effect of equal-channel angular pressing on pitting corrosion of pure aluminum

Injoon Son, Hiroaki Nakano, Satoshi Oue, Shigeo Kobayashi, Hisaaki Fukushima, Zenji Horita

研究成果: ジャーナルへの寄稿記事

8 引用 (Scopus)

抄録

The effect of equal-channel angular pressing (ECAP) on the pitting corrosion of pure Al was investigated using electrochemical techniques in solutions containing 0.1 m mol·dm-3 of Na2SO 4 and 8.46 mol·dm-3 of NaCl (300 ppm Cl -) and followed by surface analysis. The potential for pitting corrosion of pure Al was clearly shifted in the noble direction by the ECAP process indicating that this process improves resistance to pitting corrosion. The time dependence of corrosion potential and the anodic potential at 1 A·m-2 revealed that the rate of formation of Al oxide films increased due to a decrease in the grain size of the Al after ECAP. Since there exists a negligible amount of impurity precipitates in pure Al, the improvement in pitting corrosion resistance of pure Al by ECAP appears to be attributable to an increase in the rate of formation of Al oxide films.

元の言語英語
記事番号450854
ジャーナルInternational Journal of Corrosion
2012
DOI
出版物ステータス出版済み - 12 1 2012
外部発表Yes

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Equal channel angular pressing
Pitting
Aluminum
Corrosion
Oxide films
Surface analysis
Corrosion resistance
Precipitates
Impurities

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Process Chemistry and Technology

これを引用

Effect of equal-channel angular pressing on pitting corrosion of pure aluminum. / Son, Injoon; Nakano, Hiroaki; Oue, Satoshi; Kobayashi, Shigeo; Fukushima, Hisaaki; Horita, Zenji.

:: International Journal of Corrosion, 巻 2012, 450854, 01.12.2012.

研究成果: ジャーナルへの寄稿記事

Son, Injoon ; Nakano, Hiroaki ; Oue, Satoshi ; Kobayashi, Shigeo ; Fukushima, Hisaaki ; Horita, Zenji. / Effect of equal-channel angular pressing on pitting corrosion of pure aluminum. :: International Journal of Corrosion. 2012 ; 巻 2012.
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AU - Horita, Zenji

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