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Citation: HU Guang-Hui, WU Hui-Huang, YANG Fang-Zu, ZHENG Yi-Xiong, WANG Sheng-Lin. Effects of LaCl₃ and Fe₂(SO₄)₃ on Electroless Ni-W-P Plating[J]. Chinese Journal of Applied Chemistry, ;2003, 20(11): 1025-1029. shu

Effects of LaCl₃ and Fe₂(SO₄)₃ on Electroless Ni-W-P Plating

1.
a State Key Laboratory for Physical Chemistry of Solid Surface, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005;
2.
b College of Materials Science, Huaqiao University, Quanzhou

Corresponding author: WU Hui-Huang,
Received Date: 28 February 2003
Available Online: 13 May 2003
Fund Project: 国家自然科学基金资助项目(20073035) (20073035)

The influences of additives LaCl₃ and Fe₂(SO₄)₃ in plating solution for electroless Ni-W-P deposition have been investigated as function of deposition rate, composition, structure and morphology of alloy formed. The results show that 1~10 mg/L LaCl₃ could accelerate deposition rate, whereas 20~100 mg/L LaCl₃ decrease deposition rate, reduce W content and diminish the grain size. Being different from LaCl₃, Fe₂(SO₄)₃ could increase deposition rate, reduce P content, and hardly affect the grain size. Energy Diffusion Specta (EDS) indicate LaCl₃ is not a consumptive additive, but Fe₂(SO₄)₃ is. Fe₂(SO₄)₃ raises deposition rate by forming catalytic centres, being deposited on the substrate surface.
- LaCl₃,
- Fe₂(SO₄)₃,
- electroless plating,
- amorphous Ni-W-P deposite
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Effects of LaCl₃ and Fe₂(SO₄)₃ on Electroless Ni-W-P Plating