磷酸盐快补材料的耐腐蚀试验

摘要

The influence of different corrosion medium on phosphate fast mending material is studied,which provides a theoretical basis for corrosion protection design.Based on the existing definition and evaluation index of corrosion resistance of phosphate fast filling material,the effects of five corrosion mediums on mechanical properties,volume stability and strength retention of phosphate fast mending material were studied,and their corrosion resistance was obtained.The compressive strength and flexural strength of phosphate fast mending material are approximately the same with the increase of age.All kinds of solution of phosphate fast mending material shrinkage increases with age,before 28d age,the growth rate was larger,and the late growth rate decreased obviously.The highest strength retention rate of phosphate fast mending material in 5 corrosion media was 53.91％,the lowest 22.43％.Phosphate fast mending material has stronger corrosion resistance in salt corrosion medium,and it has poor corrosion resistance in acid base corrosion medium.%目的 研究不同腐蚀介质对磷酸盐快补材料的影响,为防腐蚀设计提供理论基础.方法 根据现有磷酸盐快补材料耐腐蚀的定义和评价指标,研究5种腐蚀介质对磷酸盐快补材料力学性能、体积稳定性和强度保留率的影响,进而得出其耐腐蚀能力的强弱.结果 磷酸盐快补材料的抗压和抗折强度随龄期的增长其变化趋势大致相同.各种溶液中的磷酸盐快补材料的干缩率随龄期的增加而增加,28d龄期以前的增长幅度较大,后期增长幅度明显降低.磷酸盐快补材料在5种腐蚀介质中的强度保留率最高为53.91％,最低22.43％.结论 磷酸盐快补材料在盐腐蚀介质中,耐腐蚀较强;在酸碱腐蚀介质中,耐腐蚀较差.