Effect of alloying elements on the amorphous formation and corrosion resistance of electroless Ni–P based alloys

Effect of Tin Addition on the Properties of Electroless Ni-P-Sn Ternary Deposits

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] In order to extend the properties of electroless Ni-P coating, the ternary nickel alloys were developed by co-deposition technology, in which the second metal salts were added to nickel solution, such as tungsten (W), 2,[21][22][23][24][25][26][27][28][29] chromium (Cr), [30][31][32][33] molybdenum (Mo), [34][35][36] copper (Cu), [37][38][39][40][41][42] tin (Sn). [43][44][45] Among of these ternary Ni-P-X alloys, the Ni-P-Sn alloy is reported having excellent corrosion resistance, heat-resistance and weldability. 44,45) It was reported that the addition of tin to Ni-P binary all...…”

“…[43][44][45] Among of these ternary Ni-P-X alloys, the Ni-P-Sn alloy is reported having excellent corrosion resistance, heat-resistance and weldability. 44,45) It was reported that the addition of tin to Ni-P binary alloys could improve the formability of the amorphous phase. 45) Although the corrosion resistance of Ni-P-Sn amorphous deposits is as good as that of stainless steel, the adding tin to Ni-P deposits does not usually improve the corrosion resistance than that of binary Ni-P, in which the amount of adding tin is about 0.7-10.4 at%.…”

“…44,45) It was reported that the addition of tin to Ni-P binary alloys could improve the formability of the amorphous phase. 45) Although the corrosion resistance of Ni-P-Sn amorphous deposits is as good as that of stainless steel, the adding tin to Ni-P deposits does not usually improve the corrosion resistance than that of binary Ni-P, in which the amount of adding tin is about 0.7-10.4 at%. It was reported that the ternary Ni-Sn-P coating exhibited better corrosion resistance than Ni-P coating when the electrochemical analysis was tested in 10% HCl solution, 44) in which the ternary Ni-Sn-P coating contained 2.48 mass% tin.…”

Surface morphology and structure of Ni–P, Ni–P–ZrO2, Ni–W–P, Ni–W–P–ZrO2 coatings deposited by electroless method

“…When the latter is low, 1-3 wt.%, the structure becomes semicrystalline and above this range it becomes amorphous [1][2][3][4][5][6]. Three-component coatings, which besides nickel and phosphorous, contain Cu, Co, W, Fe, Re, Zn and Sn [7][8][9][10][11][12][13][14][15] also show an amorphous structure after a certain limit phosphorous content is exceeded. For Ni-Re-P coatings deposited from acid baths the limit is 7 wt.% [13], but for Ni-Co-P coatings it is as low as 3 wt.% [9].…”

The rate of electroless deposition of a four-component Ni–W–P–ZrO2 composite coating from a glycine bath

“…Most often Ni-Fe-P-B coatings, characterized by high corrosion resistance in an alkaline medium, are described [22]. Also Ni-W-Cu-P [23][24][25] and Ni-Sn-Cu-P coatings [26,27] (with enhanced resistance to corrosion), Ni-Re-W-P [28] and Ni-W-Sn-P coatings [29] (with high resistance to high temperature), and composite coatings: Ni-W-B-(SiC, diamond) (with enhanced resistance to abrasion), Ni-Cu-P-PTFE [30][31][32][33] (with high corrosion and abrasion resistance and antiscaling properties; PTFEsignificant influence on the surface free energy of the coatings), Ni-P-SiC-PTFE [34][35][36][37] (with enhanced microhardness, corrosion resistance and good tribological properties), Ni-P-graphite-SiC [38,39] (low friction coefficient, wear resistance), Ni-P-ZrO 2 -Al 2 O 3 (with enhanced microhardness and wear resistance) [40] were investigated. It has been shown that the rate of deposition, and composition of such coatings to a considerable degree depend on the concentration of nickel ions and that of codeposited metal ions.…”