Physical And Electrochemical Characterisation Of Electroless Nickel Coatings On Carbon Steel
Price
Free (open access)
Transaction
Volume
17
Pages
13
Published
1997
Size
1,181 kb
Paper DOI
10.2495/SURF970051
Copyright
WIT Press
Author(s)
C. Kerr, D. Barker and F. Walsh
Abstract
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^) was measured and the corrosion current density (
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