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用扫描Ｋｅｌｖｉｎ探针技术测定了不锈钢焊接接头的形貌和伏打电位差分布，发现此电位分布图与焊接区在尿素合成介质中长期腐蚀后的形貌有良好的对应关系
The morphology of the stainless steel welded joint and the potential distribution of the volt potential were measured by scanning Kelvin probe technique. It was found that this potential distribution map had a good correspondence with the morphology of the welded zone after long-term corrosion in the urea synthesis medium