| CrMo钢板的金属尘化腐蚀扩散模型研究 |
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| 引用本文： | 康元浩,周昌玉,胡桂明.CrMo钢板的金属尘化腐蚀扩散模型研究[J].压力容器,2011,28(7):1-5,34. |
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| 作者姓名： | 康元浩 周昌玉 胡桂明 |
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| 作者单位： | 1. 南京工业大学机械与动力工程学院,江苏南京,210009
2. 南京林业大学机械电子工程学院,江苏南京,210037 |
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| 摘 要： | 基于Fick第二定律、化学动力学及扩散热力学,推导得到了扩散、化学反应等因素耦合作用下的修正Fick 2定律,以薄板为对象,差分求解得到尘化腐蚀过程中不同因素作用下基于两种扩散模型内部瞬时碳浓度分布图,并结合Cr5Mo钢的尘化腐蚀试验,分析了化学反应因素在扩散中作用。研究结果表明：c-Fick 2中修正项系数k～值对计算得到的浓度值有重要的影响;随着k～值的增大,浓度值下降得越多,当k～≤1时对扩散的影响不显著;本试验条件下k～=2.0769,化学反应因素对碳扩散的影响较小,该模型可以描述尘化腐蚀试验过程中的碳浓度分布情况,对尘化腐蚀程度的预测提供了依据。
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| 关 键 词： | 金属尘化 Fick第二定律 扩散 化学反应 耦合 |
Study on Metal Dusting Corrosion Diffusion Model of CrMo Steel |
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| KANG Yuan-hao,ZHOU Chang-yu,HU Gui-ming.Study on Metal Dusting Corrosion Diffusion Model of CrMo Steel[J].Pressure Vessel Technology,2011,28(7):1-5,34. |
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| Authors: | KANG Yuan-hao ZHOU Chang-yu HU Gui-ming |
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| Affiliation: | KANG Yuan-hao1,ZHOU Chang-yu1,HU Gui-ming2(1.School of Mechanical and Power Engineering,Nanjing University of Technology,Nanjing 210009,China,2.College of Electronic and Mechanical Engineering,Nanjing Forestry University,Nanjing 210037,China) |
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| Abstract: | Based on Fick 2 Law,chemical kinetics and diffusion thermodynamics,the modified Fick 2 Law is obtained under the consideration of the coupling effect of diffusion and chemical reaction.According to dusting corrosion experiment of Cr5Mo steel,the concentration distribution of solute in thin plate under different factors can be obtained by using finite difference method based on two diffusion models in the process of metal dusting.The effect of chemical reaction in diffusion is also analyzed.According to the ... |
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| Keywords: | metal dusting the Fick 2 law diffuse chemical reaction coupling |
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