非金属承压容器用塑料腐蚀性能变化规律研究  

Study on Variation Law of Corrosion Behavior of Plastics Used in Non-metal Pressure Vessel

作　　者：李茂东 李涛[2] 黄国家 李俊[2] 伍振凌 LI Maodong;LI Tao;HUANG Guojia;LI Jun;WU Zhenling(Guangzhou Special Pressure Equipment Inspection&Research Institute,Guangzhou 510663,China;School of Mechanical Engineering,Sichuan University of Science&Engineering,Zigong 643000,China)

机构地区：[1]广州特种承压设备检测研究院,广州510663 [2]四川理工学院机械工程学院,四川自贡643000

出　　处：《中国塑料》2018年第11期96-101,共6页China Plastics

基　　金：广东省质监局科技计划项目(2016CT22)

摘　　要：以工程应用较多的线形低密度聚乙烯(PE-LLD)和聚丙烯(PP)为研究对象,分别将2种材料的试样置于硫酸、硝酸、盐酸、氢氧化钠、氯化钠溶液中进行分组多周期腐蚀实验,并对腐蚀后的试样进行力学性能与热分析实验。结果表明,PP经10%(质量分数,下同)的NaOH溶液腐蚀1周后,冲击强度值变化率为23.9%;PE-LLD经10%的HCl溶液腐蚀2周后,冲击强度变化率达22.6%;10%的H2SO4溶液对PE-LLD熔融热焓变化影响最为显著,经过6周浸泡腐蚀,热焓值减小率达54.4%。Thermoplastics have been widely used in petroleum,chemical,construction,urban gathering and transportation systems due to their superior performance.This work focuses on the corrosive behaviors of linear low-density polyethylene(PE-LLD)and polypropylene(PP)against sulfuric acid,nitric acid,hydrochloric acid,sodium hydroxide and sodium chloride solution.The research results indicate that the impact strength of PP was found to show a loss rate of 23.9%after corrosion ina 10 wt%NaOH solution for one week,whereas the loss rate for PE-LLD was 22.6%after corrosion in a 10 wt%HCl solution for two weeks.The effect of H 2 SO 4 solution with a concentration of 10 wt%on the melting enthalpy of PE-LLD was very noticeable,and the enthalpy value decreased by 54.4%after immersion corrosion for 6 weeks.

关 键 词：非金属承压容器 低密度聚乙烯 聚丙烯 腐蚀介质 力学性能 热分析 

分 类 号：TQ320.7[化学工程—合成树脂塑料工业]