一例无溶剂环氧涂层失效分析

西气东输管道沿线压气站的埋地管线使用了无溶剂环氧涂料,在过去新疆段的部分压气站内出现了埋地管道泄露的情况,为了解无溶剂涂层在四道班压气站的应用状况,进行了开挖调查,结果发现,管线上的无溶剂环氧涂层总体质量较差,出现了大量的剥离、破损和脱落等现象,防腐层厚度不均匀,小管线上涂层厚度严重不足,给管线的正常运行带来了严重安全隐患,因此建议及时对防腐层进行修复。

An analysis on failure of solvent-free epoxy coatings

Solvent-free epoxy coatings were used on gas compressor stations of West-East Gas Pipeline.Gas leaked from the underground pipeline of some compressor stations of West-East Gas Pipeline in the past,then excavation and survey were performed to know the application effect on Si Daoban gas compressor station.It was found that the quality of solvent-free epoxy coating was not good totally with phenomena of debonding,damage,falling off and asymmetry thickness and the thickness of coating on small diameter pipes was not enough,which bring about severe safe hidden trouble for normal operation of pipelines.A suggestion on reparation for coatings was proposed.