Abstract
Ni–Mo nanocrystalline layers were electrodeposited using direct current from citrate–ammonia solutions. The quartz crystal microbalance investigation confirms that the discharge process starts with hydrogen evolution before the onset of the alloy deposition. The grain size was estimated from X-ray line broadening. It decreases when the molybdenum content is increased. It is smaller for layers deposited at pH 9.5 than 8.5. The microhardness exhibits a maximum close to 800 Vickers for τMo around 17 wt%. For higher τMo a softening is observed showing a deviation from Hall-Petch behaviour due to small grain size. In deaerated hydrochloric solutions, the layers show a large passivation domain without any pitting. The corrosion currents as well as the passivation currents, higher than for the bulk Hastelloy B alloy, decrease when τMo is increased.
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Chassaing, E., Portail, N., Levy, Af. et al. Characterisation of electrodeposited nanocrystalline Ni–Mo alloys. Journal of Applied Electrochemistry 34, 1085–1091 (2004). https://doi.org/10.1007/s10800-004-2460-z
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DOI: https://doi.org/10.1007/s10800-004-2460-z