Effects of Test Conditions on Corrosion Reactions and Hydrogen Absorption in Hydrogen Embrittlement Tests Using an Ammonium Thiocyanate Solution

• Ichiba Mikiyuki

  TEPCO Research Institute, Tokyo Electric Power Company

• Takai Kenichi

  Department of Engineering and Applied Science, Faculty of Science and Technology, Sophia University

• Sakai Jun’ichi

  Faculty of Science and Engineering, Waseda University

抄録

Ammonium thiocyanate is widely used as a reagent for promoting hydrogen absorption by high-strength steels. The effects of the solution concentration, temperature and dissolved oxygen on corrosion film formation, corrosion reactions and hydrogen absorption were investigated in a hydrogen embrittlement test environment using an ammonium thiocyanate aqueous solution. A still bath of a 20 mass% ammonium thiocyanate solution displayed a supply limitation, whereas a solution with flow influenced the corrosion and hydrogen absorption by the tested steel. The concentration of dissolved oxygen that forms an iron oxide film was found to have a small effect on hydrogen absorption. The change in the hydrogen content of the tested steel with elapsed time is explained in terms of changes in the equilibrium concentration of hydrogen on the steel surface and in the corrosion rate. The change in the solution pH during potentiostatic electrolysis tests in an ammonium thiocyanate solution is also discussed.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 56 (3), 397-404, 2016

  一般社団法人 日本鉄鋼協会

キーワード

• corrosion
• hydrogen embrittlement
• martensitic steels
• hydrogen
• electrochemistry
• ammonium thiocyanate
• TDA
• hydrogen diffusion
• hydrogen charging

詳細情報

• CRID: 1390001206489350656
• NII論文ID: 130005138513
• DOI: 10.2355/isijinternational.isijint-2015-288
• ISSN: 13475460
• ISSN: 09151559
• Web Site: https://www.jstage.jst.go.jp/article/isijinternational/56/3/56_ISIJINT-2015-288/_pdf
• 本文言語コード: en
• データソース種別:
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