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Application of Linear Polarization Techniques to the Measurement of Corrosion Rates in Simulated Geothermal Brines

机译：线性极化技术在模拟地热盐水腐蚀速率测量中的应用

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The linear polarization of polarization resistance (PR) technique was investigated in high- and low-salinity geothermal brines at 150 and 250 exp 0 C on a low carbon steel (A53B) and a ferritic stainless steel (E-brite 26-1) with and without the presence of oxygen in the brine. There was good agreement between weight loss data and the results from linear polarization data. Oxygen generally accelerated the corrosion rate, and in the presence of oxygen the usual form of the PR equation must be replaced by the mass transfer equation to predict corrosion rates correctly. Results of the study were compared with the corrosion rate output of commercial PR instrumentation, and it was concluded that this instrumentation is adequate for field investigations in which oxygen is absent. However, when oxygen is present, commercial instruments may underestimate actual corrosion rates considerably. (ERA citation 06:009090)

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