长输热网管道铝箔玻纤布反射层的腐蚀原因  

Corrosion Reasons of Reflective Layer of Aluminum Foil with Fiberglass Cloth on Long Heat-Supply Network Pipeline

作　　者：纪国剑 郭晶晶[1,2] 李森 王政伟[1,2] 薛瑞芳 JI Guojian;GUO Jingjing;LI Sen;WANG Zhengwei;XUE Ruifang(College of Petroleum Engineering,Changzhou University,Changzhou 213164,China;Jiangsu Key Laboratory of Green Process Equipment,Changzhou University,Changzhou 213164,China;Jiangsu Longying Pipeline New Material Co.,Ltd.,Changzhou 213016,China)

机构地区：[1]常州大学石油工程学院,常州213164 [2]常州大学江苏省绿色过程装备重点实验室,常州213164 [3]江苏龙英管道新材料有限公司,常州213016

出　　处：《腐蚀与防护》2020年第8期61-64,共4页Corrosion & Protection

基　　金：江苏自然科学基金(BK20180957);江苏省研究生科研与实践创新计划(SJCX19_0666);江苏省绿色过程装备实验室开放课题基金(GPE201901)。

摘　　要：某电厂高温环境中工作的热网管道铝箔玻纤布反射层发生腐蚀,对其发白变黑处进行了取样观察,并结合X射线荧光光谱仪对腐蚀表面的金属元素进行了分析。结果表明:铝箔与接触的玻纤布发生化学反应,使铝箔表面钙元素含量成倍增加,生成的共生金属沉淀物沉积在其表面,导致反射层的反射率下降和管道的散热损失增加;另外,水蒸气的渗透也加速了腐蚀的发生。The reflective layer of aluminum foil with fiberglass cloth on heat-supply network pipeline working in high temperature environment in a power plant was corroded.Samples taken from whitening and blackening areas were observed,and the metal elements on the corroded surface were analyzed by X-ray fluorescence spectrometer.The results show that the chemical reaction between the aluminum foil and the contacted fiberglass cloth caused the calcium content on the surface of the aluminum foil to increase exponentially.The generated symbiotic metallic sediment deposited on the surface,resulting in a decrease in the reflectivity of the reflective layer and an increase in the heat dissipation loss of the pipeline.In addition,the penetration of water vapor also accelerated the occurrence of corrosion.

关 键 词：铝箔 玻纤布 腐蚀 反射层 辐射 

分 类 号：TK175.3[动力工程及工程热物理—热能工程]