Corrosion behaviour of electrodeposited nanocrystalline Ni–W and Ni–Fe–W alloys

WEAR RESISTANCE OF ELECTRODEPOSITED Fe-W ALLOY COATINGS UNDER DRY CONDITIONS AND IN THE PRESENCE OF RAPESEED OIL

“…Recently, electrodeposited tungsten alloys with iron group metals (Fe, Co, Ni) become the subject of extensive studies due to their attractive properties: high hardness [1], corrosion and wear resistance [2,3]; thermal stability [4]; catalytic activity for hydrogen evolution reaction [5], methanol oxidation [6] and reduction of NO x [7]. This makes these alloys appealing alternative materials for different industrial branches, including the fabrication of protective coatings for Cr replacement, barrier layers for Cu-and Sn-containing interconnects [8] and different microelectromechanical systems (MEMS) [9].…”

Effect of Microstructural Changes during Annealing on Thermoelectromotive Force and Resistivity of Electrodeposited Ni85.8Fe10.6W1.4Cu2.2 Alloy

“…This microstructure is the result of the high electrodeposition current density applied as well as of the presence of iron, copper, and, particularly, tungsten in the FCC crystal lattice of the solid solution of nickel [7][8][9][10][11][12][13][14][15][16][17]35].…”

“…The presence of tungsten, iron, and copper in the FCC solid solution of nickel inhibits crystalline grain growth [7][8][9][10][11][12][13][14][15][16][17]. Tungsten, iron, and copper cause an increase in the mean interatom distance in the FCC phase, resulting in the shift of peak maxima to lower 2 values.…”

“…Nickel/iron alloys have good mechanical, electrical, and magnetic properties and a high catalytic activity for some electrochemical reactions [5][6][7]. Alloying these alloys with small quantities of tungsten improves their thermal stability, wear resistance, corrosion resistance, microhardness, and high-temperature oxidation [8][9][10][11][12][13][14][15][16][17].…”

The corrosion behaviour of nanograined metals and alloys

“…Another interesting type of alloy that exhibits high hardness, good heat resistance and better corrosion behaviour, with respect to elemental nickel, includes Ni-W and Ni-Fe-W. The deposited nanocrystalline materials of these alloys have shown superior corrosion resistance due to preferential dissolution of nickel and formation of a rich tungsten film on the alloy surface [40] . During the corrosion process tungsten preferentially migrates toward the surface and forms protective oxides.…”