Al–Mg–Si系合金の腐食に及ぼす塩化物水溶液中のカチオン種の影響

• 藤村 涼子

  住友軽金属工業株式会社　研究開発センター

• 小山 高弘

  住友軽金属工業株式会社　研究開発センター

• 内田 秀俊

  住友軽金属工業株式会社　名古屋製造所　品質保証部

書誌事項

タイトル別名

• Influence of the cation species in Cl^- containing solution on corrosion of Al–Mg–Si alloy
• Al-Mg-Siケイ ゴウキン ノ フショク ニ オヨボス エンカブツ スイヨウエキ チュウ ノ カチオンシュ ノ エイキョウ
• Influence of the cation species in Cl- containing solution on corrosion of Al^|^ndash;Mg^|^ndash;Si alloy

抄録

In this work, the influence of cation species on the corrosion behavior of Al–Mg–Si alloy in Cl^- containing solution was studied by immersion test and electrochemical measurement. The results of immersion test showed that severe pitting corrosion occurred at the Al-masking boundary of the sample and more weight loss of samples after immersion test gained in MgCl₂ solution than those in NaCl and CaCl₂ solutions. Anodic polarization curves showed little difference in pitting potential of Al–Mg–Si alloy in Cl^- containing solutions regardless of the cation species. On the other hand, cathodic polarization curves showed the increase of cathodic current density in MgCl₂ solution than those in NaCl and CaCl₂ solutions. This electrochemical behavior suggested the remarkable corrosion of Al–Mg–Si alloy in MgCl₂ solution was caused by the increase of cathodic reaction. The reason why the cathodic reaction increased in MgCl₂ solution was considered that the pH at cathode surface was kept by buffering action of Mg²⁺ because of the less solubility of Mg (OH) ₂.

収録刊行物

• 軽金属

  軽金属 63 (5), 175-181, 2013

  一般社団法人 軽金属学会

キーワード

• corrosion
• cation
• Al–Mg–Si alloy
• cathode
• pH

詳細情報

• CRID: 1390282681317359872
• NII論文ID: 10031193248
• NII書誌ID: AN00069773
• DOI: 10.2464/jilm.63.175
• ISSN: 18808018
• ISSN: 04515994
• NDL書誌ID: 024518274
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024518274
• 本文言語コード: ja
• データソース種別:
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  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可