摘要
针对绝热材料吸湿导致绝热层下腐蚀的问题,采用标准对比分析与试验测试相结合的方法,系统梳理了12项国内外腐蚀评价标准(7项模拟试验标准、5项浸出液测评标准),探讨不同标准在评价指标选取、测试流程设计、结果判定准则等方面的差异与特征;明确当前评价标准体系存在的适用性缺陷与完善空间。基于上述标准分析结果,选取GB/T 17393—2008,ASTM C871-18(2023)及ASTM C795-08(2023)标准为参照,设计并开展多种绝热材料浸出液定量评价试验,重点对比分析新型纳米绝热材料与传统绝热材料的关键腐蚀性能指标。研究结果表明:新型纳米绝热材料中,纳米气凝胶毡样品的pH值低于7(呈弱酸性)的占比达67%,其余关键腐蚀性能指标(如电导率、氯离子含量等)均满足相关评价要求。本研究成果为完善绝热材料腐蚀评价标准体系、科学指导工业绝热材料选型提供了关键依据,对保障工业设备长效安全运行具有重要的理论与实践价值。
To address the issue of corrosion under insulation caused by moisture absorption of insulating materials,a method combining standard comparative analysis and experimental testing was adopted.Twelve domestic and international corrosion evaluation standards(seven simulation test standards and five leachate evaluation standards)were systematically reviewed.The differences and characteristics of various standards regarding the selection of evaluation indicators,test process design,and result judgment criteria were explored.The applicability defects and areas for improvement in the current evaluation standard system were identified.Based on the analysis results of the aforementioned standards,GB/T 17393—2008,ASTM C871-18(2023),and ASTM C795-08(2023)were selected as references.Quantitative evaluation tests on the leachate of various insulating materials were designed and conducted,focusing on the comparative analysis of key corrosion performance indicators between new nano‑insulating materials and traditional insulating materials.The research results indicate that among the new nano‑insulating materials,67%of the nano‑aerogel felt samples have a pH value below 7(weakly acidic),while other key corrosion performance indicators(such as electrical conductivity,chloride ion content,etc.)all meet the relevant evaluation requirements.The outcomes of this study provide a crucial basis for improving the corrosion evaluation standard system for insulating materials and scientifically guiding the selection of industrial insulating materials,offering significant theoretical and practical value for ensuring the long‑term safe operation of industrial equipment.
作者
王奕璇
段永锋
李晓炜
WANG Yixuan;DUAN Yongfeng;LI Xiaowei(Luoyang R&D Center of Technology,Sinopec Engineering(Group)Co.,Ltd.,Luoyang 471032,China)
出处
《压力容器》
北大核心
2025年第12期40-47,共8页
Pressure Vessel Technology
基金
中石化总部课题“绝热层下腐蚀检测评估及控制技术研究与应用”(CHG23040)。
关键词
绝热材料
浸出液
PH值
腐蚀性离子
insulating materials
leachate
pH value
corrosive ions
