Physical and electrochemical characterisation of electroless nickel coatings on carbon steel

被引：0
|
作者：
Kerr, C [1 ]
Barker, D [1 ]
Walsh, F [1 ]
机构：
[1] Univ Portsmouth, Sch Pharm Biomed & Phys Sci, Appl Electrochem Grp, Portsmouth PO1 2DT, Hants, England
来源：
SURFACE TREATMENT: COMPUTER METHODS AND EXPERIMENTAL MEASUREMENTS | 1997年
关键词：
D O I：
暂无
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Various electrolyte and deposit parameters were investigated to assess the performance of electroless nickel coatings deposited from baths aged in the range 0-6 metal bath turnovers. The properties studied included: measurement of internal stress, analysis of orthophosphite concentration in the plating solution and determination of phosphorus content in the deposit. The effect of bath ageing on the hardness of the deposit in the as-plated condition, and after heat treatment, was also examined. Changes in the deposit mainly appeared in the range of 3-5 metal turnovers, suggesting that the life expectancy of these electroless nickel plating solutions should not exceed 6 metal bath turnovers. The corrosion potential (E-cor) was measured and the corrosion current density (i(cor)) of coated samples was determined by extrapolation of polarisation vs. log current density (Tafel) plots in 0.125M H2SO4 at 22 degrees C.
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页码：47 / 59
页数：13
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