研究了用于舰船管系异种金属绝缘的石棉橡胶纤维垫片和环氧垫片在海水、碱溶液（10 % NaOH溶液）、酸溶液（10 % H2SO4溶液）和重油中浸泡后，其体电阻率和面电阻率随浸泡时间的变化规律。实验结果显示，石棉橡胶纤维垫片在酸、碱溶液中浸泡两个月后，其湿态电阻降低到102欧姆（或欧姆?厘米）量级，在海水中的电绝缘有效期约为4个月，环氧垫片的湿态电阻可保持为104~6欧姆（或欧姆?厘米）量级，环氧材料组成的垫片其绝缘性能远好于石棉橡胶纤维垫片的绝缘性能。

The asbestos rubber fiber gaskets and epoxy gaskets were soaked in the seawater， alkaline solution（ 10 % NaOH ）， acid solution（10 % H2SO4） and heavy oil， and the variation of the volume resistivity and surface resistivity of the gaskets with soaking time were studied. The results showed that the wet resistivity of the asbestos rubber fiber gaskets reduced to 102 Ω（ or Ω?cm）level when being soaked in the alkaline solution and acid solution for two months and the period of validity of the insulation was inferred to four months in seawater， and however， the wet resistivity of the epoxy gaskets could remain 104~6 Ω（or Ω?cm） level， and as the conclusion， the performance of the insulation of the epoxy gaskets is much better than that of asbestos rubber fiber gaskets.