海水淡化装置内舱碳钢防护涂层寿命预测研究  

Life Prediction of Carbon Steel Protective Coating in Inner Compartment of Seawater Desalination Plant

作　　者：张黎黎[1] 王跃平[1] 陈凯锋[1,2] 查小琴 王晶晶[1,2] 张心悦 梁宇[1,2] 亓海霞 ZHANG Li-li;WANG Yue-ping;CHEN Kai-feng;ZHA Xiao-qin;WANG Jing-jing;ZHANG Xin-yue;LIANG Yu;QI Hai-xia(Xiamen Branch of Luoyang Ship Material research Institute,Xiamen 361101,China;Science and Technology on Marine Corrosion and Protection Laboratory,Qingdao 266101,China;Luoyang Ship Material research Institute,Luoyang 471023,China;Henan Key Laboratory of Technology and Application of Structural Materials for Ships and Marine Equipment,Luoyang 471023,China)

机构地区：[1]中国船舶重工集团公司第七二五研究所厦门分部,福建厦门361101 [2]海洋腐蚀与防护重点实验室,山东青岛266101 [3]中国船舶重工集团公司第七二五研究所,河南洛阳471023 [4]河南省船舶及海工装备结构材料技术与应用重点实验室,河南洛阳471023

出　　处：《装备环境工程》2020年第12期119-125,共7页Equipment Environmental Engineering

基　　金：国家重点研发计划项目(2016YFC0401205)。

摘　　要：目的获得海水淡化装置内舱碳钢防护涂层的耐热老化寿命。方法通过调整设备的温度及压力,模拟低温多效蒸发器半浸区工作环境,进行为期20个月的浸泡加速试验。以涂层的附着力随老化时间的变化情况、涂层颜色变化情况、涂层浸泡前后微观形貌和阻抗值为评判依据,在老化经验公式的基础上进行外推计算,进行涂层热老化寿命预测。结果该涂料在该区域经过20个月的挂片试验,涂层表面均未出现起泡、锈蚀、开裂、脱落等失效现象;表面色差变化趋势相对稳定;干态附着力为10.9 MPa,经过20个月的测试,附着力为8.95 MPa;0.01 Hz低频阻抗(|Z|0.01 Hz)条件下,其电化学交流阻抗值由浸泡前的1.8×10^8Ω·cm^2下降为浸泡后的7.9×10^6Ω·cm^2。涂层阻抗的数量级虽有所下降,但仍然具有较高的阻抗值,具有较好的保护性能。经过老化经验公式进行外推计算,预测海水淡化装置内舱碳钢防护涂层的热老化寿命为13.33年。结论海水淡化装置内舱防护涂料具有长寿命热老化重防腐作用。The work aims to obtain the heat-resistant aging life of the carbon steel protective coating in the inner compartment of seawater desalination plant.The temperature and pressure of the equipment were adjusted to simulate the working environment of the low-temperature multi-effect evaporato r.Soaking acceleration test of 20 months was conducted.The thermal aging life of the coating was predicted by extrapolating the empirical formula on the basis of the change of coating adhesion with aging time,the change of coating color,the change of coating morphology before and after soaking,and the coating impedance value.The failure phenomena such as blister,rust,cracking and peeling were not found on the coating surface after 20 months of hanging test.The variation trend of color difference of coating surface was relatively stable.The dry adhesion of the coating was 10.9 MPa,and the adhesion was 8.95 MPa after 20 months of test.Under 0.01 Hz low frequency impedance(|Z|0.01 Hz),its electrochemical impedance value changed from 1.8×10^8Ω·cm^2 to 7.9×10^6Ω·cm^2.The order of magnitude of coating impedance was decreased,but was still within the scope of effective protection.The thermal aging life of carbon steel protective coating in the inner compartment of seawater desalination plant was predicted to be 13.33 years by extrapolating the aging empirical formula.The interior protective coating of seawater desalination plant has the function of long life thermal aging and anti-corrosion.

关 键 词：海水淡化 模拟加速试验 防腐涂层 寿命预测 

分 类 号：TQ637.2[化学工程—精细化工]