Influence of pH and flow on the polarisation behaviour of pure magnesium in borate buffer solutions

Sachiko Hiromoto, Akiko Yamamoto, Norio Maruyama, Hidetoshi Somekawa, Toshiji Mukai

研究成果: Article査読

65 被引用数 (Scopus)

抄録

The influence of pH and flow on the polarisation and impedance behaviour of pure Mg was investigated in 0.6 wt% NaCl borate buffer solutions at pH 6.7, 7.6, and 9.3 using a rotating electrode. The existence of flow prevented the accumulation of the corrosion product and promoted uniform corrosion, leading to an increase of the anodic current density and a decrease of the impedance regardless of the pH of the bulk solution. The influence of the pH did not obviously appear under the static condition, whereas, under the dynamic condition, the anodic current density at pH 6.7 and 7.6 was higher than that at pH 9.3. This result suggests that pH near the surface can be buffered at the pH of bulk solution by borate buffer with the acceleration of ion diffusion.

本文言語English
ページ(範囲)3561-3568
ページ数8
ジャーナルCorrosion Science
50
12
DOI
出版ステータスPublished - 2008 12月
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 化学工学(全般)
  • 材料科学(全般)

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