Electrochemical characterisation of porosity and corrosion resistance in electrodeposited metal coatings

Walsh, F.C., Ponce de León, C., Kerr, C,, Court, S. and Barker, B.D. (2008) Electrochemical characterisation of porosity and corrosion resistance in electrodeposited metal coatings. Surface and Coating Technology, 202, (21), 5092-5102. (doi:10.1016/j.surfcoat.2008.05.008).


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Electrochemical techniques for the assessment of porosity in electrodeposited metal coatings are reviewed. The determination of porosity and corrosion, resistance is illustrated by electrochemical data from three coating/substrate systems namely: electroless nickel on aluminium and steel and immersed gold coatings on an electroless copper-plated ABS polymer. Nickel coatings were up to 24 ?m thick while gold deposits had thickness between 75 and 190 nm. Tafel extrapolation and linear polarisation resistance methods were used to determine the corrosion rate of the coated substrates. The aluminium samples were tested in 5% w/v (0.85 mol dm? 3) NaCl, while coated steel and ABS samples were immersed in 0.125 mol dm? 3 H2SO4 and 0.1 mol dm? 3 NaBH4, respectively, at 295 K. Current vs. time curves and anodic polarisation behaviour have also been considered.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/j.surfcoat.2008.05.008
ISSNs: 0257-8972 (print)
Related URLs:
Keywords: corrosion resistance, corrosion testing, current vs. time, linear polarisation resistance, electroless nickel coatings, polarisation curves, porosity, tafel extrapolation
Subjects: T Technology > TP Chemical technology
Q Science > QD Chemistry
Divisions : University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 54641
Accepted Date and Publication Date:
30 July 2008Published
30 November 2007Submitted
Date Deposited: 04 Aug 2008
Last Modified: 31 Mar 2016 12:34
URI: http://eprints.soton.ac.uk/id/eprint/54641

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