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Title: Effects of surfactants in an electroless nickel-plating bath on the properties of Ni-P alloy deposits
Authors: Chen, B.-H. 
Hong, L. 
Ma, Y.
Ko, T.-M.
Issue Date: 29-May-2002
Citation: Chen, B.-H.,Hong, L.,Ma, Y.,Ko, T.-M. (2002-05-29). Effects of surfactants in an electroless nickel-plating bath on the properties of Ni-P alloy deposits. Industrial and Engineering Chemistry Research 41 (11) : 2668-2678. ScholarBank@NUS Repository.
Abstract: Effects of added surfactants in the acidic hypophosphite plating baths on the properties of the resulting electroless nickel-phosphorus (Ni-P) deposits on the brass substrates were studied. The surface appearance and microstructures were examined under a reflective optical microscope and a scanning electron microscope equipped with an in situ energy-dispersive X-ray spectroscopy with which the phosphorus contents were measured. The deposition rate and the corrosion rate of the Ni-P deposits were estimated respectively from the weight gains and losses after a period of time. It is found that the addition of suitable amounts of surfactants can increase the deposition rate up to 25% and reduce the formation of the pores on the surface of Ni-P alloys, as well as enhance the corrosion resistance of the deposits. The corrosion rate of the Ni-P alloys in 10 wt % HCl was determined. The corresponding corrosion rate fits well as an empirical power function having an order of near 1/3 in the amount of dissolved Ni-P deposits, equivalent to the concentration of nickel ions present in the acidic corrosive solution. The corrosion mechanism is discussed in line with the experimental discoveries.
Source Title: Industrial and Engineering Chemistry Research
ISSN: 08885885
Appears in Collections:Staff Publications

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