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METHOD AND SYSTEM FOR PREDICTING CORROSION RATES USING MECHANISTIC MODELS

机译:使用机械模型预测腐蚀速率的方法和系统

摘要

A computer system and method for predicting the aqueous phase C02 corrosion rate of a pipe useful in the production and transportation of oil and gas. Input parameter values corresponding to water chemistry and physical fluid and pipe properties are received. Based on these input parameter values, the system and method derive current-voltage relationships for multiple cathodic reduction reactions according to an electrochemical model of the corrosion reaction, and a current-voltage relationship for the anodic oxidation reaction of iron dissolution. A current density is obtained, at the intersection of an extrapolation of the anodic current-voltage relationship and an extrapolation of the summed cathodic current-voltage relationships. The predicted corrosion rate is then calculated from the obtained current density. The effects of secondary parameters such as scale and flow regime, and the efficacy of a corrosion inhibitor, can also be evaluated.
机译:一种预测管道的水相CO 2腐蚀速率的计算机系统和方法,可用于生产和运输石油和天然气。接收与水化学,物理流体和管道特性相对应的输入参数值。基于这些输入参数值,该系统和方法根据腐蚀反应的电化学模型,得出多个阴极还原反应的电流-电压关系,以及铁溶解的阳极氧化反应的电流-电压关系。在阳极电流-电压关系的外推和总的阴极电流-电压关系的外推的交点处获得电流密度。然后从获得的电流密度中计算出预测的腐蚀速率。还可以评估次要参数(例如水垢和流态)的影响以及缓蚀剂的功效。

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