Loughborough University
Leicestershire, UK
LE11 3TU
+44 (0)1509 263171
Loughborough University

Loughborough University Institutional Repository

Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/9632

Title: An X-ray photoelectron spectroscopy investigation of chromium conversion coatings and chromium compounds
Authors: Chapaneri, Roshan
Critchlow, Gary W.
Sutherland, I.
Wilcox, G.D.
Chojnicki, A.
Pearson, T.
Rowan, A.J.
Beamson, G.
Issue Date: 2008
Publisher: Dechema © European Corrosion Congress
Citation: CHAPANERI, R. ... et al., 2008. An X-ray photoelectron spectroscopy investigation of chromium conversion coatings and chromium compounds. Presented at: Eurocorr 2008: the European Corrosion Congress, Managing Corrosion for Sustainability, 7th-11th September 2008, Edinburgh.
Abstract: Hexavalent and trivalent chromium based conversion coatings on zinc electrodeposited steel have been investigated using X-ray photoelectron spectroscopy (XPS) with the aim of elucidating their film chemistry. Furthermore, a monochromatic Al Kα X-ray source was utilised and the spectra produced evaluated using curve fitting software to elucidate oxidation state information. In addition, a number of chromium compounds were investigated and used to complement the curve fitting analysis for the conversion coatings. High resolution Cr2p spectra from chromium compounds exhibited multiplet splitting for Cr2O3. Additional satellite emissions can also be observed for Cr2O3 and Cr(OH)3. Curve fitting of hexavalent chromium conversion coating (CCC) 2p3/2 spectra contained both Cr(VI) and Cr(III) species with the content of the former slightly higher when the X-ray beam take-off angle (TOA) was reduced to determine more surface specific information. The Cr(III) content was determined to be mainly composed of Cr(OH)3 with some Cr2O3. In comparison, trivalent CCCs were largely composed of Cr2O3 as opposed to Cr(OH)3. Survey scans of both coatings revealed that the trivalent CCCs had a higher relative zinc content.
Description: This is a conference paper.
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/9632
Appears in Collections:Conference Papers (Materials)

Files associated with this item:

File Description SizeFormat
R Chapaneri - An X-ray photoelectron spectroscopy investigation of chromium conversion coatings and chromium compounds.pdf245.72 kBAdobe PDFView/Open

 

SFX Query

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.