W-Fe电沉积机理研究

ungsten iron alloy has been widely used in mechanical preparation because of its excellent wear resistance and corrosion resistance, but there is no reasonable mechanism of electrodeposited tungsten alloy. In this paper, the mechanism of electrodeposition of tungsten-nickel alloy in citric acid-ammonia system is studied in detail. In this system, iron and citric acid-ammonia form ammonia-citric acid ammonia complex; tungstic acid and tungstic citrate Acid complex; iron and tungsten coexist, the iron citric acid complex and tungsten citric acid complex combined to form iron tungsten citric acid - ammonia multi-core mixed complex. Tungsten is only electrochemically active in this multinuclear complex complex, and without the presence of Fe, tungsten can not be reduced. ?????