EB104/EB202涂层对904L不锈钢的防腐蚀效果

摘要

通过点蚀试验、缝隙腐蚀试验和盐雾试验,研究了904L不锈钢表面未涂覆、半涂覆和全涂覆EB104/EB202涂层试样在不同含量的FeCl3溶液中的腐蚀行为.结果表明:随着FeCl3含量的增加,未涂覆EB104/EB202涂层试样的点蚀程度和缝隙腐蚀程度不断加剧.对于半涂覆EB104/EB202涂层试样,其缝隙区、未涂覆区和涂覆区的腐蚀程度依次降低;缝隙区出现严重的点蚀和缝隙腐蚀,且腐蚀程度也随着FeCl3含量的增加而加剧.全涂覆EB104/EB202涂层试样具有良好的耐点蚀、缝隙腐蚀和盐雾腐蚀性能.%Using pitting corrosion,crevice corrosion and salt-spray tests,the corrosion behavior of 904L stainless steel samples with the surfaces uncoated,half-coated and full-coated with EB104/EB202 was investigated in FeCl3 solution with different FeCl3 concentrations.The results show that the corrosion degree of the EB104/EB202 uncoated samples became worse with the increase of FeCl3 concentration both in pitting corrosion and in crevice corrosion.For the EB104/EB202 half-coated samples,the corrosion degree declined in the crevice zone,uncoated zone and full-coated zone in sequence.Pitting and crevice corrosion appeared together in the crevice zone,and the corrosion degree of the half-coated samples also became worse with the increase of FeCl3 concentration.The EB104/ EB202 full-coated samples exhibited good resistance to pitting corrosion,crevice corrosion and salt-spray corrosion.