Journal
ELECTROCHIMICA ACTA
Volume 100, Issue -, Pages 118-124Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.03.161
Keywords
Nickel-chromium-molybdenum alloys; Hybrid-BC1 alloy; Bicarbonate; XPS; AES
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Funding
- Canadian Natural Sciences and Engineering Research Council (NSERC)
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Electrochemical and surface analytical techniques (X-ray photoelectron and Auger spectroscopies) were used to characterize the influence of potential on the properties of the oxide film formed on the Hybrid BC1 (a Ni-Cr-Mo) alloy in chloride solutions containing bicarbonate. In the passive region the film possesses the expected bilayer structure with a Cr(III)-dominated barrier layer containing mixed oxidation states of Mo and an outer dominantly-hydroxide layer. At more positive potentials the Cr/Mo content of the film decreases when bicarbonate is present and the alloy becomes covered by a thick (>100 nm), and only partially protective, Ni(OH)(2) layer (c) 2013 Elsevier Ltd. All rights reserved.
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