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用石油沥青加玻璃布做油(气)管道防腐层,尽管有取材容易、价格低廉和施工工艺熟练的优点,但也有易老化、吸水量大、不耐细菌腐蚀等缺点。尤其是在管道防腐施工质量差或生产运行中工艺参数不合理的情况下,将会造成防腐层过早老化、吸水量增大、严重漏电现象,致使阴极保护工况日趋恶化。用增加阴极保护站的方法来改善也难以估计能坚持多
With petroleum asphalt and glass cloth to do oil (gas) pipeline coating, despite the availability of materials, cheap and skilled craftsmanship advantages, but also easy to aging, water absorption, not resistant to bacterial corrosion and other shortcomings. Especially in the pipeline construction quality is poor or the production process parameters unreasonable circumstances, will lead to premature aging coating, water absorption increases, the serious leakage phenomenon, resulting in deteriorating cathodic protection conditions. It is hard to estimate that the method of adding cathodic protection stations can persist