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Corrosion Using Pine Rotating Cylinder Electrodes

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This technical note addresses two aspects of electrochemical testing using the Rotating Cylinder Electrode (RCE). First, the fundamental hydrodynamic behavior at a rotating cylinder is summarized, including equations which predict the mass transport limited corrosion current at an RCE. Second, a means of selecting the suitable rotation rate for an RCE test is discussed, with emphasis being placed on matching a particular rotation rate to a particular flow velocity in a smooth pipe. In addition, a bibliography of significant reports regarding the RCE is provided.
Introduction
Corrosion processes can accelerate significantly under extreme environmental conditions such as high temperature, high pressure, and turbulent fluid flow.When troubleshooting a field corrosion problem, a researcher often needs to return to the lab and reproduce the same (or similar) harsh conditions in a controlled setting. While familiar laboratory equipment for temperature control (ovens, water baths) and pressure control (autoclaves) is generally readily available and easy to use, recreating a fluid flow condition generally poses a larger challenge to the researcher. Laboratory flow loop systems often require complex (i.e., expensive) plumbing, maintenance,
and calibration to reliably and reproducibly move fluid past a metal sample. But the need for this
type of large-scale laboratory equipment can often be avoided by moving the metal sample with respect to the fluid instead. 旋转圆盘电极/MSR装置
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