✍ Scribed by Haruyoshi Nishikawa; Shin-ichi Minami
No coin nor oath required. For personal study only.
the influence of water on the type, the formation behavior and the kinetic parameters of anodic oxide films of lanthanum in NaH 2 PO,-ethylene glycol solutions containing various amounts of water was investigated by transmission electron micrographs, voltage-coulomb curves at constant current, current decay curves at constant voltage and the formation kinetics. The formation kinetic parameters such as the average field strength and Tafel slope, which were determined by the galvanostatic technique, were plotted against the metal-oxide bond energy . These results indicated that the film behaved as a barrier type when it was formed in a solution containing small amounts of water ; however, it resembled a porous type in the higher water content solutions . It was suggested that the role of water varied with is content in the solution .
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