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Potentiostatic methods in sample preparation and etching
Umeå University, Faculty of Science and Technology, Department of Chemistry.
2004 (English)In: Praktische metallographie, ISSN 0032-678X, E-ISSN 2195-8599, Vol. 41, no 11, 561-576 p.Article in journal (Refereed) Published
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Text
Abstract [en]

A potentiostat was used in order to optimise etching and phase extraction. Polarisation curves for different grades of steel and different electrolytes were collected and the results were used for optimisation of the voltage and time with multivariate methods. In electrolytic etching a potential is set to control the etching reaction. With the help of a potentiostat the potential is maintained at the set value and the process is well defined and reproducible. Etching procedures were tried out to differentiate between various intermetallic phases that were indistinguishable using other etching methods and the results were evaluated with light and X-ray diffraction methods. Settings for rapid phase extraction of duplex stainless steels in 10% HCl in ethanol were found from the Potentio dynamic scan (PDS), without dissolving the desired phase. An investigation of the influence of the illumination of the sample in image processing was also performed.

Place, publisher, year, edition, pages
Munich: Carl Hanser Verlag GmbH, 2004. Vol. 41, no 11, 561-576 p.
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:umu:diva-122145ISI: 000225897200003OAI: oai:DiVA.org:umu-122145DiVA: diva2:942190
Available from: 2016-06-23 Created: 2016-06-15 Last updated: 2016-06-23Bibliographically approved

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