Corrosion and impressed current cathodic protection of copper-based materials using a bimetallic rotating cylinder electrode (BRCE)
Kear, G., Barker, B.D., Stokes, K.R. and Walsh, F.C. (2005) Corrosion and impressed current cathodic protection of copper-based materials using a bimetallic rotating cylinder electrode (BRCE). Corrosion Science, 47, (7), 1694-1705. (doi:10.1016/j.corsci.2004.08.013).
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A bimetallic rotating cylinder electrode (having individual electrode areas of 10 cm2 and rotating at 200–1400 rpm) has been used to examine the corrosion and protection characteristics of copper/nickel aluminium bronze and 90–10 copper–nickel/nickel aluminium bronze galvanic couples in filtered seawater at 25 °C. The flow-influenced electrochemistry of the systems was determined using zero resistance ammetry, corrosion potential measurements and a potential step current transient technique. In each case, the galvanic corrosion potential and corrosion rate displayed a Reynolds number dependency where mass transport control of the anodic dissolution reaction partially controlled the reaction rate. Bimetallic impressed current cathodic protection (ICCP) has also been demonstrated for a range of applied protection potentials and Reynolds numbers. A comparison has been made between the directly measured bimetallic ICCP current demand and that determined from independent, single-metal rotating cylinder electrode measurements. In this case, the mixed charge and mass transport controlled rate of oxygen reduction was examined.
|Keywords:||a. copper, copper–nickel, nickel aluminium bronze, b. polarisation, rde/rce, c. cathodic protection, bimetallic corrosion, oxygen reduction|
|Subjects:||T Technology > TP Chemical technology
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Q Science > QC Physics
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences
|Date Deposited:||14 Mar 2006|
|Last Modified:||27 Mar 2014 18:12|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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