Power Plant Chemistry Measurement Advancements: Oxidation Reduction Potential
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چکیده
Measurements which show the potential for corrosion of a plant’s metallurgy due to interaction with the system water have gained in importance within the last two decades. Among the most successful of these measurements are those which measure an actual potential which is based upon the oxidation/reduction reactions taking place. The measurement of Oxidation Reduction Potential (ORP) has been used extensively in both nuclear and fossil fuel power plants to show the potential for corrosion in a system. Optimum ORP levels are dependent upon system metallurgy and water chemistry treatment. The system reaction, and thus the ORP response, will vary depending upon a number of factors, such as oxygen, hydrogen and oxygen scavenger concentrations. Comparison of the oxidation/reduction potential at various points in the system is useful for observing total system response to variations in chemical addition and system transients which can lead to more corrosive conditions in the water.
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