| Autor: |
B.D. Barker, Keith Stokes, Frank C. Walsh, G. Kear |
| Rok vydání: |
2005 |
| Předmět: |
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| Zdroj: |
Corrosion Science. 47:1694-1705 |
| ISSN: |
0010-938X |
| DOI: |
10.1016/j.corsci.2004.08.013 |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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