波纹管膨胀节套管腐蚀原因研究

Study on Corrosion Causes of Bellows Expansion Joint Casing

文章以波纹管膨胀节套管腐蚀现象作为研究对象,综合运用宏观检查、扫描电镜检查与能谱分析方法进行套管外壁腐蚀原因的分析,最终发现外部环境温度变化、保冷层局部破损、水分渗透以及保冷材料成分等均有可能加剧保冷层下的套管腐蚀现象。基于上述因素,在实际检修处理环节还需科学选取保冷材料、加强保冷层施工质量控制,定期开展腐蚀检查、做好防腐处理,优化套管质量。

Taking the corrosion phenomenon of bellows expansion joint casing as the research object,this paper comprehensively uses the methods of macro inspection,scanning electron microscope and energy spectrum analysis to analyze the causes of casing outer wall corrosion.Finally,it is found that the change of external ambient temperature,local damage of cold insulation layer,water permeability and composition of cold insulation materials may aggravate the corrosion phenomenon of casing under cold insulation layer.Based on the above factors,in the actual maintenance and treatment link,it is also necessary to scientifically select cold insulation materials,strengthen the construction quality control of cold insulation layer,regularly carry out corrosion inspection,do well in anti-corrosion treatment,and optimize the casing quality.