压力容器2011，Vol.28Issue(7)：1-5,34,6.DOI:10.3969/j.issn.1001-4837.2011.07.001
CrMo钢板的金属尘化腐蚀扩散模型研究
Study on Metal Dusting Corrosion Diffusion Model of CrMo Steel
摘要
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 results of the research, the modified coefficient k of c - Fick 2 has a significant effect on the concentration value; With the increase of k, the concentration value is deceasing. When k =S 1, the value of k has notobvious impact on the diffusion. Under the experiment condition of this paper, the value of k is 2.0769, and the factor of chemical reaction has slight impact on the diffusion of carbon. This model can be used to depict the distribution of carbon concentration during the dust corrosion experiment process and provide evidence for prediction of metal dusting corrosion.关键词
金属尘化/Fick第二定律/扩散/化学反应/耦合Key words
metal dusting/the Fick 2 law/diffuse/chemical reaction/coupling分类
矿业与冶金引用本文复制引用
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):1-5,34,6.基金项目
国家自然科学基金项目(50675096) （50675096）
