[1]唐志永,金保升,孙克勤,等.电站烟囱混凝土硫酸腐蚀的数值模拟[J].东南大学学报(自然科学版),2005,35(5):757-760.[doi:10.3969/j.issn.1001-0505.2005.05.022]
 Tang Zhiyong,Jin Baosheng,Sun Keqin,et al.Numerical simulation of sulfuric acid corrosion of concrete in power plant chimney[J].Journal of Southeast University (Natural Science Edition),2005,35(5):757-760.[doi:10.3969/j.issn.1001-0505.2005.05.022]
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电站烟囱混凝土硫酸腐蚀的数值模拟()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
35
期数:
2005年第5期
页码:
757-760
栏目:
环境科学与工程
出版日期:
2005-09-20

文章信息/Info

Title:
Numerical simulation of sulfuric acid corrosion of concrete in power plant chimney
作者:
唐志永1 金保升1 孙克勤2 仲兆平1
1 东南大学动力工程系, 南京 210096; 2 江苏苏源环保工程股份有限公司, 南京 210024
Author(s):
Tang Zhiyong1 Jin Baosheng1 Sun Keqin2 Zhong Zhaoping1
1 Department of Power Engineering, Southeast University, Nanjing 210096, China
2 Jiangsu Suyuan Environment Protection Limited Corporation, Nanjing 210024, China
关键词:
混凝土 硫酸 腐蚀 定时间步长和变坐标步长的差分求解方法
Keywords:
concrete sulfuric acid corrosion fixed-time-step and variable-space-interval finite difference approach
分类号:
X511
DOI:
10.3969/j.issn.1001-0505.2005.05.022
摘要:
研究了电站烟囱C30混凝土在80 ℃、质量分数为15%硫酸溶液浸泡条件下的腐蚀规律,根据Fick扩散方程和反应速率方程,提出一个简化的移动边界腐蚀模型.采用定时间步长和变坐标步长的差分求解方法,对移动边界腐蚀模型进行求解,并采用相应的人工腐蚀实验来对模型进行验证.计算结果表明,随着时间的推移,在固定的时间步长内移动界面的位移变缓,腐蚀深度随时间的延续而增加,符合腐蚀的变化规律.计算结果与实验数据有较好的吻合性,该模型可以用于混凝土在硫酸腐蚀下腐蚀速度的预测,指导实际的工程设计.
Abstract:
In order to investigate the corrosion of power plant chimney by the condensed sulfuric acid from the flue gas, corrosion of C30 concrete exposed to 15% sulfuric acid solution at 80 ℃ was studied. Based on the Fick diffusion equation and the chemical reaction rate equation, a simplified corrosion model with a moving boundary was developed. The model was solved by using fixed-time-step and variable-space-interval method. The data calculated from the model show that in fixed and equal time steps the move of the moving interface slows down with time, while corrosion depth increases with the extension of corrosion time.These results are in a good accordance with the experimental data. The model can be used to predict the corrosion rates of concrete exposed to the sulfuric acid solution.

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备注/Memo

备注/Memo:
作者简介: 唐志永(1979—),男,博士生; 金保升(联系人),男,教授,博士生导师,bsjin@seu.edu.cn.
更新日期/Last Update: 2005-09-20