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Citation: Fang Jingli. STUDY ON ELECTROLESS Ni-B ALLOY PLATING FROM CITRATE-AMMONIA SYSTEM[J]. Chinese Journal of Applied Chemistry, ;1988, 5(6): 44-48. shu

STUDY ON ELECTROLESS Ni-B ALLOY PLATING FROM CITRATE-AMMONIA SYSTEM

Fang Jingli

1.
Applied Chemistry Institute, Nanjing University

Received Date: 12 October 1987
Available Online: 3 January 1988

The effects of bath composition and deposition conditions on the deposition rate and boron content of the deposit from the bath of citrate-ammonia system have been investigated, The optimum bath composition and deposition conditions are as follows: NiSO₄·7H₂O 40g/1, HB₃O₃ 30g/1, NH₄Cl 30g/1, triammonium citrate 20g/1, dimothylaminoborane (DMAB)4g/1, pH9.5-10, 45℃. The deposit has contact resistance atout 0.126Ω, very close to that of Ag deposit.The XPS and AES results showed that the Ni-B deoosit is composed of Ni₂B alloy and Ni. Ni(Ⅱ) and B(Ⅲ) were found on the surface of the deposit.
- Nickel-boron alloy,
- Electroless plating,
- Citrate-ammonia system,
- Dimethylaminoborane
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