Preparation of ZnWO 4 /TiO 2 composite film and its photocathodic protection for 304 stainless steel under visible light

ZnWO /TiO composite films were fabricated on TiO substrate by hydrothermal method. The ZnWO nanorods-sensitized TiO coupled with 304 stainless steel was served as photoelectrode to study its anticorrosion effect for metal. Under visible light, the photocathodic protection ability of TiO and ZnWO /TiO composite film was measured by photoelectrochemical program on potentiostat. Open circuit potential variation result showed that sanmartinite ZnWO nanorods could enhance the photoelectrochemical activity of TiO , and the ZnWO /TiO composite films could absorb energy and store electrons to play a role in corrosion protection for metal.