Determination of Surface Chromium Content in Chromized Steel by EPMA

• Watanabe Toshio

  Products Research & Development Laboratories, Nippon Steel Corporation

• Hashiguchi Yoshihiro

  Hirohata Works, Nippon Steel Corporation

• Tanaka Yasuji

  Products Research & Development Laboratories, Nippon Steel Corporation

抄録

Chromized steel has a gradient in the chromium content along the direction of depth (the highest concentration in the surface). Determination of the surface chromium contents is important as an index of corrosion resistance. One of the present coauthors has earlier reported on the method of quantitative analysis of samples having 10 μm chromium-iron alloy layers and constant concentration gradients. The present paper is concerned with determination of the surface chromium contents of samples whose alloy layers are less than 5 μm and whose concentration gradients are not constant. The electron probe microanalysis (EPMA) the CrKα radiation is made by with exciting voltages of 7 kV and 10 kV, determined values being expressed by C(7 K) and C(10 K), respectively. It reveals that when C(10 K)/C(7 K) is greater than 0.8, C(7 K) is 95% or more of the true surface contents. This method of analysis provides information on the contents at a depth of 0.1 μm from the surface.

収録刊行物

• Transactions of the Japan Institute of Metals

  Transactions of the Japan Institute of Metals 22 (11), 747-752, 1981

  社団法人 日本金属学会

キーワード

• General Engineering

詳細情報

• CRID: 1390001205117315584
• NII論文ID: 130003485877
• DOI: 10.2320/matertrans1960.22.747
• COI: 1:CAS:528:DyaL38XksFGhsA%3D%3D
• ISSN: 24324701
• ISSN: 00214434
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1960/22/11/22_11_747/_pdf
• 本文言語コード: en
• データソース種別:
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