北海-临高海底光缆路由区海底土中几种腐蚀因子的调查

研究了北海-临高海底光缆路由区表层和1.5 m层海底土中的泥温、pH值、Eh值、硫化物和硫酸盐还原菌等几种腐蚀因子.结果发现,泥温和pH值表层与1.5 m层海底土中差别不大,对海缆的安全性不会造成威胁;路由区除北端粗砂区表层海底土为强氧化环境外,其余无论是表层还是1.5 m层都属于还原环境和过渡环境区域;硫化物含量的分布特征是1.5 m层明显高于表层,且对海缆外护层可能有轻微的腐蚀作用;硫酸盐还原菌的含量分布规律则是表层高于1.5 m 层,在光缆的埋设深度上微生物腐蚀作用轻微.

Survey on corrosive factors in seabed soils in the Beihai-Lingao submarine cable route areas

The soil temperature,pH,Eh,sulfide and sulfate reduction bacteria of superficial coat and 1.5 m seabed soil have been surveyed in the Beihai-Lingao submarine cable route areas in this paper.Conclusions indicate that the soil temperature and pH value almost are not change in superficial coat and 1.5 m seabed soil,which would not impact on the security of submarine cable.The coarse sand area in the north section of route belongs to strong oxidizing environment,and others areas of route are deoxidizing or transition environments.Sulfide distribution character is higher in 1.5 m coats than in superficial coat,that maybe corrode cable in soil.The distribution law of sulfate reduction bacteria is higher in superficial coat than in 1.5 m coat,that indicates faintly corrosive action of microbe in the depth which cable are buried.