ID 111252
タイトル別表記
Analysis of Valence for Chromate Conversion Coatings Using Laboratory XAFS Spectrometer and a Comparison with X-ray Photoelectron Spectroscopy
著者
宮内, 宏哉 京都大学|京都府中小企業技術センター
北垣, 寛 京都府中小企業技術センター
中村, 知彦 京都府中小企業技術センター
中西, 貞博 京都府中小企業技術センター
河合, 潤 京都大学
キーワード
laboratory XAFS
XANES
chromate conversion coating
hexavalent chromium
資料タイプ
学術雑誌論文
抄録
We performed a nondestructive and in laboratory evaluation technique of hexavalent chromium (Cr(VI)) in chromate conversion coatings using a laboratory X-ray absorption fine structure (XAFS) spectrometer equipped with W anode X-ray tube. The recorded XANES spectrum of a chromate conversion coating sample with fluorescence mode possessed the Cr–K X-ray absorption edge. We have obtained calibration curves of the ratio of Cr(VI)/Cr(III) by the height of pre-edge peak and the Cr–K X-ray absorption edge energy of the reference samples prepared by Cr2O3 (Cr(III)) and CrO3 (Cr(VI)) particle reagents. The calibration curves showed the high correlation coefficients such as 1.00 for the height of pre-edge peak and 0.99 for the value of the energy on the Cr–K X-ray absorption edge. The ratio of Cr(VI)/Cr(III) in the chromate conversion coating has also been evaluated by the X-ray photoelectron spectroscopy (XPS) and 1,5-diphenyl-carbazide absorption spectrometry (DPC) methods. The ratio of Cr(VI)/Cr(III) evaluated by the laboratory XAFS spectrometer was almost identical to that by XPS method.
掲載誌名
鉄と鋼
ISSN
18832954
00211575
cat書誌ID
AA12060774
AN00151251
出版者
一般社団法人 日本鉄鋼協会
95
12
開始ページ
864
終了ページ
869
発行日
2009-12-10
権利情報
© 2009 一般社団法人 日本鉄鋼協会
EDB ID
207332
出版社版DOI
出版社版URL
フルテキストファイル
言語
jpn
著者版フラグ
出版社版
部局
理工学系