In order to effectively prevent corrosion of cast iron materials and improve the safety of ships,the high-tem-perature formic acid corrosion resistance performance of cast iron coatings for ships is studied.Preparation of nano Fe powder materials and Fe Al/Cr3C2 composite spraying powder materials with the addition of nano Al powder and Cr3C2 powder,as well as indicator formic acid solution.Cast iron specimens M-1 and M-2 were prepared using normalized 20 steel,and formic acid solution was used as the corrosion solution to test their high-temperature corrosion resistance in differ-ent high-temperature environments.The experimental results show that after corrosion in high-temperature formic acid solu-tion,the cast iron coating specimen exhibits varying degrees of protrusions,which are Al and Cr oxides as well as Fe oxides.This oxide serves as a protective film for the cast iron material,so the high-temperature corrosion resistance of specimen M-2 is good;Under the same high-temperature formic acid solution corrosion environment,the mass loss value of specimen M-2 is also lower than that of specimen M-l,indicating that the cast iron specimen M-2 prepared by adding Fe-Al/Cr3C2 compos-ite spraying powder material with nano Al powder and Cr3C2 powder has strong high-temperature corrosion resistance.
关键词
船舶/铸铁/耐高温/甲酸腐蚀涂层/抗高温腐蚀性能/腐蚀速率
Key words
ship/cast iron/high temperature resistance/formic acid corrosion coating/high temperature corro-sion resistance/corrosion rate
维普
万方数据