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 μm 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.
|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
|Date Deposited:||04 Aug 2008|
|Last Modified:||08 Jun 2012 12:24|
|Contact Email Address:||email@example.com|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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