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RESEARCH PRODUCT

Growth of passive layers on nickel during their voltammetric anodic dissolution in a weakly acid medium

Francisco VicenteJoan GregoriJosé Juan García-jareñoDavid Giménez-romero

subject

PassivationChemistryGeneral Chemical EngineeringInorganic chemistryAnalytical chemistrychemistry.chemical_elementCharge (physics)Quartz crystal microbalanceElectrochemistryNickelElectrochemistryAnodic dissolutionLayer (electronics)Voltammetry

description

Abstract Quartz crystal microbalance in combination with voltammetry has been used for studying the electrochemical oxidation behaviour of a nickel deposit in a weakly acid medium. The instantaneous mass/charge ratio (Fdm/dQ) analysis allows to obtain the fraction of charge consumed in the passivation process, and, that way, the experimental kinetic equation of the passive layer growth. This experimental law has been fitted to the theoretical equation derived from the point defect model theory under voltammetric conditions.

https://doi.org/10.1016/j.electacta.2006.05.051