Influence of the supersaturation on the nucleation-growth process of scale electrodeposition by in situ observation through a transparent quartz crystal microbalance.
An original technique allowed three in situ measurements to be obtained simultaneously, i.e. electrochemical and mass measurements and a microscope image of the interface between electrode and solution. The nucleation-growth process of CaCO3 deposition was investigated by varying different parameters which influenced the supersaturation coefficient, the Ca2+ concentration, pH and convection of the carbonically pure water near the substrate. The results showed that the variation of the scaling rate was due, for the two first cases, to an influence of the nucleation process whereas for the last case, the kinetics of scale deposition were modified by a shift of the growth rate.
UPR15-CNRS-Physique des Liquides et Electrochimie, Université Pierre et Marie Curie, 4 Place Jussieu, Tour 22 75252 Paris Cedex 05, France. odevos@ccr.jussieu.fr
O
O
Devos
C
C
Gabrielli
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B
Tribollet
D002119:Calcium Carbonate / Q000737:chemistry*; D003343:Corrosion; D004563:Electrochemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D014881:Water Supply
D002119:Calcium Carbonate