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01137 DATA QUALITY, ISSUES AND GUIDELINES FOR ECP MEASUREMENT IN HIGH TEMPERATURE WATER

Picture for 01137 DATA QUALITY, ISSUES AND GUIDELINES
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Product Number: 51300-01137-SG
ISBN: 01137 2001 CP
Author: Young-Jin Kim and Peter L. Andresen
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The electrochemical corrosion potential (ECP) of a metal is influenced by a large number of variables, such as oxygen and hydrogen concentrations, hydrogen concentration, the surface chemistry, impurities, hydrodynamic flow conditions, reference electrode, etc. The state of reference electrode development and qualification, water chemistry condition, surface history, etc., is such that achieving total agreement from all international investigators is difficult. However, identification of key factors, preferred techniques, and sensible ranges in potentials for several standard conditions is possible. The purpose of this paper is to identify factors that influence ECP measurements in high temperature water, propose recommended techniques, and characterize the expected range of corrosion potentials for specific materials, dissolved gas chemistries, water chemistry/pH, and temperature associated with BWR, PWR and related high temperature water environments.

Keywords: electrochemical corrosion potential, high temperature water, SS, oxygen, hydrogen, flow rate, impurities, reference electrode
The electrochemical corrosion potential (ECP) of a metal is influenced by a large number of variables, such as oxygen and hydrogen concentrations, hydrogen concentration, the surface chemistry, impurities, hydrodynamic flow conditions, reference electrode, etc. The state of reference electrode development and qualification, water chemistry condition, surface history, etc., is such that achieving total agreement from all international investigators is difficult. However, identification of key factors, preferred techniques, and sensible ranges in potentials for several standard conditions is possible. The purpose of this paper is to identify factors that influence ECP measurements in high temperature water, propose recommended techniques, and characterize the expected range of corrosion potentials for specific materials, dissolved gas chemistries, water chemistry/pH, and temperature associated with BWR, PWR and related high temperature water environments.

Keywords: electrochemical corrosion potential, high temperature water, SS, oxygen, hydrogen, flow rate, impurities, reference electrode
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