新型BGNDMA低合金钢的耐腐蚀性能

研究了新型BGNDMA低合金钢的显微组织、拉伸性能和耐腐蚀性能,并与09CrCuSb钢和2205双相不锈钢的性能进行了对比.结果表明:BGNDMA钢的显微组织为铁素体+珠光体,拉伸性能优于09CrCuSb钢的;在70℃、质量分数50％H2SO4溶液中浸泡24 h时绝大多数试样的腐蚀速率不高于80 g·m-2·h-1,统...

Corrosion Resistance of New BGNDMA Low-Alloy Steel

The microstructure,tensile properties and corrosion resistance of a new BGNDMA low-alloy steel were studied and compared with the properties of 09 CrCuSb steel and 2205 duplex stainless steel.The results show that the microstructure of the BGNDMA steel was ferrite and pearlite,and the tensile properties were better than those of 09 CrCuSb steel.When immersed in 70℃,50 wt%H2 SO4 solution for 24 h,the corrosion rates of most samples were not higher than 80 g·m^-2·h^-1,and the statistical average value was about 36.367 g·m^-2·h^-1,indicating the excellent resistance to sulfuric acid corrosion.In the dead green liquor and the industrial flue gas dew point(not higher than 80℃)corrosion environment,the BGNDMA steel underwent uniform corrosion,and 2205 duplex stainless steel underwent local corrosion such as pitting corrosion and crevice corrosion;BGNDMA steel was expected to replace 2205 duplex stainless steel in H2 SO4-HCl mixed acid dew point corrosion environment.In an industrial flue gas dew point corrosion environment,the corrosion resistance of the hot rolled BGNDMA steel was better than that of the normalized steel.