温度和湍流对Cr合金钢环烷酸腐蚀的影响

发布时间：2019-02-14 08:10

【摘要】：对环烷酸腐蚀控制机制分析推测高温高流速下lnv与(-1/T)间的规律。对API581中Cr合金钢的腐蚀数据进行分析及模拟实验。结果表明:lnv-(-1/T)之间存在线性规律,应用lnv-(-1/T)线性规律可以较准确预测不同温度下Cr合金钢的平均环烷酸腐蚀速率。根据Fluent模拟得到不同条件下腐蚀试样表面的湍流分布,将试样表面湍流分布与表面3D腐蚀深度关联后可明确湍流强度会显著影响局部腐蚀深度。在2%弱湍流区,局部最大腐蚀深度与总平均腐蚀深度比值仅为1.56,但在8%湍流强度下,两者比值可大于3.7,影响程度随湍流强度的增加呈曲线快速提高。
[Abstract]:The control mechanism of naphthenic acid corrosion is analyzed and the relationship between lnv and (-1 / T) at high temperature and high flow rate is deduced. The corrosion data of Cr alloy steel in API581 were analyzed and simulated. The results show that there is a linear rule between lnv- (-1 / T) and the average naphthenic acid corrosion rate of Cr alloy steel at different temperatures can be predicted accurately by using lnv- (-1 / T) linear law. According to the Fluent simulation, the turbulent distribution on the surface of the corroded specimen under different conditions is obtained. When the turbulent distribution on the surface of the sample is correlated with the depth of 3D corrosion on the surface, it is clear that the turbulence intensity will significantly affect the local corrosion depth. The ratio of the local maximum corrosion depth to the total average corrosion depth is only 1.56 in the weak turbulent region of 2%, but the ratio can be greater than 3.7 when the turbulence intensity is 8%, and the influence degree increases rapidly with the increase of the turbulence intensity.
【作者单位】：安徽工业大学机械工程学院;合肥通用机械研究院;
【基金】：“十二五”国家科技支撑计划资助项目(2011BAK06B03) 863计划资助项目(2012AA040103) 安徽工业大学优秀创新团队资助项目(000452)
【分类号】：TG172

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