ＳＯ４｀２－´イオンを含んだ溶液中でのアルミニウム合金の孔食成長挙動

• 黒田 周

  三菱アルミニウム（株）技術開発センター

• 当摩 建

  三菱アルミニウム（株）技術開発センター

書誌事項

タイトル別名

• Pitting corrosion growth characteristics of aluminum alloys in the solution containing SO42- ion.
• SO42-イオンを含んだ溶液中でのアルミニウム合金の孔食成長挙動
• SO42- イオン オ フクンダ ヨウエキチュウ デ ノ アルミニウム ゴウキ

抄録

To investigate the pitting corrosion growth rate of aluminum alloys in the solution containing SO₄^2- ion, the immersion corrosion test and electrochemical measurements were carried out on aluminum and Al–0.4%Cu alloy clad with the liner containing Zn. In the solution containing SO₄^2- ion the pitting corrosion could grow deeply even in the alloy having gradient of Zn concentration. While Cl^- and SO₄^2- ions concentrated into the pit, SO₄^2- ion had little effect on electrochemical characteristics in acidified higher chloride solution. The pitting potential of aluminum became much less noble with as a little addition of Zn as 0.2%, but that of Al–Cu alloy scarcely varied in acidified higher chloride solution. As the SO₄^2- ion had the controlling effect of pitting corrosion density, which introduced higher chloride ion concentration in a pit. Therefore, for the control of pitting corrosion growth rate the potential slope had to be sharper in the solution containing SO₄^2- ion. Enough Zn content at surface was required to obtain better pitting corrosion resistance, especially in Al–Cu alloy.

収録刊行物

• 軽金属

  軽金属 48 (6), 288-293, 1998

  一般社団法人 軽金属学会

キーワード

• SO₄^2- ion
• pitting corrosion
• electrochemical measurement
• pitting potential
• Cl^- ion

詳細情報

• CRID: 1390001206337297792
• NII論文ID: 10002664857
• NII書誌ID: AN00069773
• DOI: 10.2464/jilm.48.288
• COI: 1:CAS:528:DyaK1cXkt1Wlu74%3D
• ISSN: 18808018
• ISSN: 04515994
• NDL書誌ID: 4512224
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4512224
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可