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Effective boundary element methods in corrosion analysis

机译：腐蚀分析中有效的边界元方法

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Effective boundary element methods to analyze corrosion problems for complicated structures were presented. The methods can be classified into two groups. The first one makes use of the characteristics of the structure to be analyzed, i.e. (1) thousands of same size tubes in an heal exchanger, for example, are treated by introducing a concept 'macroscopic polarization curve', (2) slender parts in a structure such as an off-shore structure and a bridge girder are analyzed by a kind of 'zooming method', (3) a non-axisymmetric potential distribution in an axisymmetric structure such as a pipeline and a seawater pump affected with outside structures is calculated by 'Fourier series method', and (4) target sub-region to be analyzed in detail, e.g. interior of guide casing of seawater pump, is analyzed by treating accompanying sub-regions as 'equivalent boundary conditions'. The second one is an application of the Fast Multipole boundary element method (FMBEM), and can be used for an arbitrary structure. The method is also useful for optimum design of cathodic protection.
机译：提出了分析复杂结构腐蚀问题的有效边界元方法。这些方法可以分为两类。第一个利用要分析的结构的特性，即（1）例如，通过引入概念“宏观极化曲线”来处理愈合交换器中的数千个相同尺寸的管，（2）细长的零件。通过一种“缩放方法”分析了近海结构和桥梁等结构，（3）受外部结构影响的轴对称结构（如管道和海水泵）中的非轴对称电势分布是“傅立叶级数法”计算得出的结果，以及（4）要详细分析的目标子区域，例如通过将附带的子区域视为“等效边界条件”来分析海水泵导向壳体的内部。第二个是快速多极边界元方法（FMBEM）的应用，可用于任意结构。该方法对于阴极保护的最佳设计也是有用的。

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