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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference 2006 vol.7: Operations, Applications, and Components >METHODS TO CALCULATE CORROSION RATES FOR ALLOY 22 FROM POLARIZATION RESISTANCE EXPERIMENTS
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METHODS TO CALCULATE CORROSION RATES FOR ALLOY 22 FROM POLARIZATION RESISTANCE EXPERIMENTS

机译：从抗极化实验计算合金22腐蚀速率的方法

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The general corrosion rate may be measured using immersion tests or electrochemical tests. The electrochemical tests are fast and can be used for a rapid screening of environmental effects such as temperature and electrolyte composition. The electrochemical tests are described in ASTM standards G 59 and G 102. The basis of these tests is to calculate the resistance to polarization (R_p) in a voltage vs. current plot and to convert these values to corrosion rates using the Faraday law. Commercial software can calculate the corrosion rate based on inputs from the operator. This paper discusses three ways of calculating the corrosion rate (Methods 1, 2 and 3) based on a fixed set of acquired data of voltage vs. current. The conclusions are that the way the corrosion rate is calculated does not impact greatly on the absolute value of the corrosion rate. Variations in the acquired data (current, potential) from one experiment to another seem more important that the manner the data is fitted with the R_p slope.
机译：总体腐蚀速率可以使用浸没测试或电化学测试来测量。电化学测试快速，可用于快速筛选环境影响，例如温度和电解质成分。电化学测试在ASTM标准G 59和G 102中进行了描述。这些测试的基础是计算电压对电流曲线中的极化电阻（R_p），并使用法拉第定律将这些值转换为腐蚀速率。商业软件可以根据操作员的输入来计算腐蚀速率。本文讨论了基于一组固定的电压与电流数据计算腐蚀速率的方法（方法1，方法2和方法3）。结论是，腐蚀速率的计算方式对腐蚀速率的绝对值影响不大。从一个实验到另一个实验的采集数据（电流，电势）的变化似乎更重要，因为该数据以R_p斜率拟合的方式。

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