Using Fluorescence XANES Measurement to Correct the Content of Hexavalent Chromium in Chromate Conversion Coatings Determined by Diphenyl Carbazide Color Test

Journal Article · Fri Jan 19 00:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2436364· OSTI ID:21049320

Nishino, Junichi; Ofuchi, Hironori; Taniguchi, Yosuke; Honma, Tetsuo ^[1]; Sekikawa, Toshikazu; Otani, Haruka; Bando, Akio ^[2]

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1. Japan Synchrotron Radiation Research Institute, 1-1-14 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198 (Japan)
2. Mihara sangyo co., ltd. 15-26, 2chome, Mikuriyasakaemachi, Higashiosaka 577-0036 (Japan)

The Restriction of the use of certain Hazardous Substances (RoHS) directive will take effect on July 1 of this year. From that date, the use of chromate conversion coatings containing hexavalent chromium will not be permitted. By comparing the concentration of Cr6+ determined by the diphenyl carbazide color test and by fluorescence XANES (X-Ray Absorption Near Edge Structure) measurement, we can correct for the Cr6+ content of the color test. This will enable the use of the diphenyl carbazide color test to check product shipments in compliance with the RoHS directive.

• OSTI ID: 21049320
• Journal Information: AIP Conference Proceedings, Vol. 879, Issue 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436364; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ABSORPTION SPECTROSCOPY
CARBAZIDES
CHROMATES
CHROMIUM IONS
COATINGS
COLOR
CONCENTRATION RATIO
FLUORESCENCE
X RADIATION
X-RAY FLUORESCENCE ANALYSIS
X-RAY SPECTROSCOPY