溶融塩中のパルス法によるチタン薄膜の電析とその特性

概要

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Ti films were electrodeposited on SUS 304 stainless substrates by a pulse current method in an equimolar KCl-NaCl molten salt bath with K2TiF6. The influence of electrodeposition condition on the crystal orientation and morphology of the films was investigated by X-ray diffraction and scanning electron microscopy respectively. The orientation index of the Ti films varied with the temperature, electrolytic time, current density and pulse shape during electrodeposition. The morphology of Ti films consisted of well-crystallized grains, which changed rapidly above 1073K. The surface of the films became smooth in the presence of an anodic reverse current. Measurement of anodic polarization curves in 3% NaCl solution showed that the corrosion resistance of the films was almost the same as that of pure Ti sheets. It was found that films with Ti (011) preffered orientation had higher corrosion resistance than films with Ti (110) orientation.
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