CHARACTERISTICS OF TITANIUM DEPOSITS BY ELECTROLYSIS IN MOLTEN CHLORIDE FLUORIDE MIXTURE

Titanium deposits were prepared on 304 stainless steel substrates by b oth constant current and pulse current methods in molten KCl-NaCl-LiCl eutectic salts with 2 mol % potassium hexafluorotitanate. The influen ce of electrolysis conditions on the crystal orientation and morpholog y of the titanium deposits was investigated by using X-ray diffraction and scanning electron microscopy, respectively. It was found that the orientation index of the titanium deposits varied with temperature, e lectrolysis time, current density and pulse shape during electrolysis. The deposits showed a granular structure, in which the grains became larger with increase in temperature. Titanium deposits with pulse curr ent above 873 K had a better corrosion resistance than pure titanium s heet.