The Electrodeposition of Molybdenum Alloys

Abstract

A new aqueous citrate plating bath for the electrodeposition of alloys of molybdenum with cobalt, iron, and nickel is described. This type of plating solution contains the sulfate of the codepositing metal citric acid, and sodium molybdate. Ammonium hydroxide is used for adjusting the pH of the solution. A bath temperature of about 25 C is preferred. Experimental results, obtained by using the Hull cell for qualitative information and regular plating procedures for quantitative data, show the effect of bath pH, concentration of sodium molybdate, and cathode current density on the performance of the plating baths. The highest percentage of molybdenum (about 50% and more) is obtained with iron as the codepositing metal, and the lowest is with nickel.

Studies on Electrodeposition of Nickel‐Cobalt‐Tungsten Alloys

“…The cathode current efficiency decreased when the metal percentage of tungsten in the bath was kept constant or with increasing concentration of citric acid in the bath [ Fig. The variation in composition of the deposit and cathode current efficiency with electrolyte concentration is in excellent agreement with that of other workers (11,16). l(a), (b), (c)].…”

Cathodic electrodeposition of mixed molybdenum–selenium oxides

“…Furthermore, it has been readily established that transition metals such as Mo and W cannot be electrodeposited alone from aqueous solution [12,13]. Yet, binary metal alloys, metal oxides, and chalcogenides may be electrodeposited from a solution containing two or more metal ions (e.g., Fe 2+ , Ni 2+ , Co 2+ , SeO 2À 3 ) [14][15][16][17][18][19][20]. In certain instances, the more noble metal ion facilitates the electrochemical reduction of the second metal ion, such as in the formation of Mo x Se y alloys [20].…”

Microstructure and Mechanical Behavior of Ultrafine-grained Ni-Mo Alloys Processed by Top-Down and Bottom-Up Methods

“…The electrodeposition of the elements such as P, Ge, W and Mo is not possible from aqueous media; however, these metals can be co-deposited by forming alloys with iron group hypertransition metals [61][62][63][64][65][66]. The process of codeposition of elements such as P, Ge, W and Mo beside Ni, Co, Fe is classified as induced codeposition.…”