Comparision of physicochemical properties of Cr, Ni-P, Ni-Mo, Ni'W'-P and Mn-Zn alloys coatings
(EN)
Spyrelis, N
(EN)
Bagaev, S
(EN)
Kudryavtsev, V
(EN)
Gabe, D
(EN)
Tsupak, T
(EN)
Agladze, T
(EN)
Raub, Ch
(EN)
Schachameyer, S
(EN)
Hexavalent chromium bath replacement is a high priority pollution prevention issue. The aim of this study was to develop corrosion protective, wear resistant and environmentally safe coatings as an alternative to hard chromium electroplated from the Cr(VI) bath. Cr, Ni-P, Ni-Mo, Ni-""W""-P and Mn-Zn coatings were electrodeposited from a modified conventional or newly developed bath. Cr was electrodeposited from both Cr(III) and Cr(VI) baths, Ni-P(5-12%) alloy from an acetate bath, Ni-Mo from both ammonium citrate (with stabilizer) and methane-sulphonic baths and Ni-""W""-P from an ammonium citrate bath. The electroplating parameters, chemical composition, structure, hardness, wear resistance of the above-mentioned coatings are discussed in detail.
(EN)
