密封式继电器触点形貌与腐蚀类型关联性分析

Correlation analysis between contact topography and corrosion type of sealed relay

摘要:

为深入研究密封式继电器触点的失效机理，开展腐蚀形貌特征与腐蚀类型的关联性分析.选取密封式继电器触点DEAX SEM图为分析样本，在分析可能存在腐蚀反应类型的基础上，提取对应元素分布图的不规则边缘轮廓，从而将无腐蚀部分排除，同时还原了腐蚀区域形貌，量化提取其腐蚀形貌特征值并对应可能的腐蚀类型进行分析，最终利用BP神经网络算法进行关联性验证.结果表明：密封式继电器触点中Ag与Cl的原子百分比近似为1:1，在特定区域内极有可能产生AgCl化合物，并确定触点形貌与腐蚀类型存在映射关系.得到了在多种腐蚀反应共同作用下，每种反应本身的腐蚀形貌特征仍然存在的结论，并提供了一种探究腐蚀类型与腐蚀形貌特征关系的方法.

Abstract:

In order to deeply study the failure mechanism of sealed relay contact, it is necessary to investigate the correlation analysis between corrosion topography and type. The contact DEAX SEM diagram of sealed relay was selected as the analysis sample. Based on the analysis of possible types of corrosion reaction, it extracted irregular contours on the extraction distribution of corresponding elements, thereby eliminating the non-corrosive part and restoring the 3D shape of the corrosion area. The eigenvalues of the corrosion morphology were analyzed quantitatively and matched the possible corrosion type. Finally, BP neural network algorithm was used to verify the relevance. The results showed that the percentage of Ag and Cl atoms in the contact of sealed relay was approximately 1:1, so it was highly possible to produce AgCl compounds in certain areas. At the same time, the mapping relationship between contact topography and corrosion type was determined. It is concluded that the corrosion topography characteristics of each reaction still exist under the combined action of various corrosion reactions, and this paper provides a method to explore the relationship between corrosion types and corrosion morphology characteristics.