拉萨站线缆材料短期试验性能分析

Analysis of Performances of Cable Materials in Lhasa during Short Testing Period

分析了线缆材料在拉萨自然环境试验站中1～2年的短周期试验性能变化。线缆高分子材料在土壤环境中性能变化较小，而在大气环境中力学性能有所下降，HDPE耐环境性能、应力开裂性能下降26％；金属在土壤环境中腐蚀较轻。拉萨大气与土壤自然环境对材料的短期腐蚀（老化）作用比较轻微。

Changing of performances of cable materials in Lhasa within 1 to 2 years＇testing period was analyzed. Performances of polymers for cable jackets changed little in soil environment, while the mechanical performances declining in atmosphere. The stress corrosion resistance value of HDPE was declined to 24% of its original value within half a year. Corrosion of metals in soil was slight, There were no remarkable differences of corrosion performances between imported and homemade HDPE in soil environment within short period.