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51315-5693-Non-Faradaic Material Loss in Flowing Electrolyte Without Solid Particle

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Product Number: 51315-5693-SG
ISBN: 5693 2015 CP
Author: Baotong Lu
Publication Date: 2015
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The Faradaic material loss is defined by material loss caused by electrochemical reactions. It can be correlated to anodic charge generated incorrosion process using Farady's secondary law.The non-Faradaic material loss is the difference between the material loss measured by the weight loss method and the one determined by the Faraday’s secondary law. In erosive fluid the non-Faradiaic material loss is mainly due to erosion. The experiments indicated that the non-Faradaic material loss is observable in flowing corrosive electrolytes where the turbulence is tooweak to cause cavitation. The investigation reveals that the non-Faradaic material loss is accelerated by increasing wall shear stress and anodic dissolution is reduced by the increasing strength of electrode and disappears in quiescent electrolytes or under cathodic protection. Therefore the non-Faradaic material loss is likely a result of certain corrosion-aided mechanical damage mechanisms. A phenomenological model is proposed for the quantitative evaluation of the non-Faradaic material loss. The applicability of this model has been verified by the test data measured in both aqueous and non-aqueous electrolytes.
The Faradaic material loss is defined by material loss caused by electrochemical reactions. It can be correlated to anodic charge generated incorrosion process using Farady's secondary law.The non-Faradaic material loss is the difference between the material loss measured by the weight loss method and the one determined by the Faraday’s secondary law. In erosive fluid the non-Faradiaic material loss is mainly due to erosion. The experiments indicated that the non-Faradaic material loss is observable in flowing corrosive electrolytes where the turbulence is tooweak to cause cavitation. The investigation reveals that the non-Faradaic material loss is accelerated by increasing wall shear stress and anodic dissolution is reduced by the increasing strength of electrode and disappears in quiescent electrolytes or under cathodic protection. Therefore the non-Faradaic material loss is likely a result of certain corrosion-aided mechanical damage mechanisms. A phenomenological model is proposed for the quantitative evaluation of the non-Faradaic material loss. The applicability of this model has been verified by the test data measured in both aqueous and non-aqueous electrolytes.
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