The rosion factors are soil corrosion, bacteria corrosion and the construction quality of the anticorrosive coating is inferior.

• 对于腐蚀严重的无缝钢管进行了埋地环境调查，分析其受腐蚀的原因为土壤腐蚀、细菌腐蚀以及防腐层施工质量差。