According to the electrochemical impedance spectroscopy results, the corrosion products plating on alloys surface are partly protective to the parent metal with immersion time.

阻抗测试结果显示，随着浸泡时间的延长，腐蚀产物在合金表面沉积，对基体金属具有一定的保护作用。

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First, the water pump mechanical seal ring on the surface of metal corrosion.

第一，水泵的机械密封上金属环表面均匀腐蚀。

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Based on EDS and SEM analysis of metal corrosion surface, the course of contact corrosion between aluminum alloy, structural steel and basaltic microfiber heat-resistant materials were proposed.

通过对铝合金、结构钢等金属接触腐蚀表面的EDS成分分析和SEM微观形貌分析，探讨金属材料与玄武岩微纤维隔热材料接触腐蚀的原因。

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