保温层下腐蚀(Corrosion Under Insulation简称CUI)是指发生在包裹保温材料的管道或设备外表面上的一种腐蚀现象。仅仅石化行业每年因为保温层下钢结构的腐蚀造成的损失可达数十亿美元,不仅造成设备故障与停工,产品泄漏,维修成本大量增加,严重的甚至可能造成伤亡事故。包裹有保温层管道和设备的使用寿命与CUI有很大的关系,一般为了美观效果,在做完保温层后往往 Corrosion Under Insulation (CUI) refers to a corrosion phenomenon that occurs on the outer surface of a pipe or piece of equipment that encloses insulation. In the meantime, the petrochemical industry alone can lose billions of dollars a year due to the corrosion of steel structures under the insulation layer, causing not only equipment failure and shutdown, product leakage, substantial increase in maintenance costs, and serious or even casualty accidents. Wrapped insulation pipe and equipment life and CUI have a great relationship, the general for the aesthetic effect, often after doing the insulation layer