阴极保护在乙炔湿式气柜钟罩外壁的应用  

Application of catioce Protection on the Outer Wall of Acetylene Wet Gas Cabinet Bell Cover

作　　者：祖运鹤 李存文 李鸿达 田丰 谢凡 陈亚平 ZU Yunhe;LI Cunwen;LI Hongda;TIAN Feng;XlE Fan;CHEN Yaping(State Key Laboratory of Special Surface Protection Materials and Application Technology,China Academy of Machinery Wuhan Research Institute of Materials Proteetion Co.,Ltd.,Wuhan 430030,China;Zhongyan Jilantai Chloroalkali Chemical Co.,Ltd.,Alxa 750336,China)

机构地区：[1]中国机械总院集团武汉材料保护研究所有限公司特种表面保护材料及应用技术国家重点实验室,湖北武汉430030 [2]中盐吉兰泰氯碱化工有限公司,内蒙古阿拉善750336

出　　处：《材料保护》2024年第9期189-194,共6页Materials Protection

摘　　要：内蒙古某化工厂乙炔湿式气柜钟罩由于检修施工周期紧,每道涂层未完全固化,就进行下一道施工,导致涂层本身存在缺陷,长时间运行后出现龟裂、剥离等现象,钟罩外壁严重生锈,甚至出现穿孔现象,存在较大安全隐患。为控制气柜钟罩外壁腐蚀,前期采取固定区域安装镁阳极和锌阳极,悬挂腐蚀试片测试腐蚀速率,得到镁阳极的防腐蚀效果最佳。后期通过理论计算以及合理布置阳极,在检修期施工安装,安装完成后测试阴极保护效果满足≤-0.85 V(vs CSE)。通过阴极保护联合现有涂层可减缓或抑制钟罩外壁腐蚀,延长其使用寿命。In response to the tight maintenance schedule of the acetylene wet gas cabinet bell cover at a chemical plant in lnner Mongolia,the subsequent layers of coating were caried out before the previous coatings had fiully cured,leading to defects in the coating itself.After long temm operation,phenomena such as cracking and peeling occured,and the outer wall of the bell cover became severely rusted,even perora ted,posing a significant saety hazard.To control the corrosion of the outer wall of gas cabinet bell cover,the magnesium anode and zinc anod were installed in the fixed area in the early stage,and the corosion rate was tested by hanging corrosion coupons to get the best anti-corosion elfect of magnesium anode.Based on theoretical caleulations and the proper arangement of anodes in the later stage,construction and installa tion camied out during the maintenance period,and the cathodic protection ellect was tested to meet<-0.85 V(vs CSE)alter the installation was completed.By combining cathodic protection with existing coatings,corosion on the outer wall of the bell cover was slowed or suppressed thereby extending its service life.

关 键 词：阴极保护 腐蚀 湿式气柜 钟罩外壁 

分 类 号：TG174.4[金属学及工艺—金属表面处理]