Corrosion and Physical-Mechanical Properties of Cr–P–W Alloy Obtained by Electrodeposition from Water–Dimethylformamide Electrolytes

Resumo

Cr–P–W protective coatings are obtained by electrodeposition from water–dimethylformamide solutions based on chromium(III) chloride, with the addition of sodium phosphinate and sodium tungstate. The resulting alloys contained up to 8 wt % of phosphorus and 1.5 wt % of tungsten, as well as some carbon. The resulting coatings are characterized by satisfactory corrosion resistance in corrosive environments containing chloride ions. The number of through pores in the coatings became negligible with a coating thickness more than 15 μm, providing sufficient protective ability of the developed coatings.