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在腐蚀领域阴极保护设计中利用数值方法,可以优化阴极保护设计,避免保护不足和过保护现象。本文针对海洋环境中金属管线的阴极保护设计。以边界元方法为基础,对腐蚀电场仿真模型进行了推导和计算。然后利用matlab开发了海底管道阴极保护电位计算软件,可以计算出阴极保护下管线的电位和电流密度分布,从而提供阴极保护系统最佳设计参数。最后对模拟海底管线的表面电位进行了实测,实测结果和数值计算结果符合,证明了基于Matlab的数值仿真计算引入腐蚀领域阴极保护设计中是行之有效的方法,可以避免实测带来的不便。
Using numerical methods in cathodic protection design in the field of corrosion, the cathodic protection design can be optimized to avoid under-protection and over-protection. This article addresses the cathodic protection of metal pipelines in the marine environment. Based on the boundary element method, the simulation model of corrosion electric field is deduced and calculated. Then the submarine pipeline cathodic protection potential calculation software was developed by matlab, which can calculate the potential and current density distribution of the pipeline under the cathodic protection, so as to provide the best design parameters of the cathodic protection system. Finally, the surface potential of the simulated submarine pipeline was measured. The measured and numerical results are in good agreement. It is proved that the numerical simulation based on Matlab is an effective method to introduce cathodic protection in the field of corrosion, which can avoid the inconvenience of actual measurement.