新型BGNDMA低合金钢的耐腐蚀性能  

Corrosion Resistance of New BGNDMA Low-Alloy Steel

作　　者：张清廉[1] 刘诚 郭金宝[1] ZHANG Qinglian;LIU Cheng;GUO Jinbao(Baoshan Iron&Steel Co.,Ltd.,Shanghai 201900,China)

机构地区：[1]宝山钢铁股份有限公司,上海201900

出　　处：《机械工程材料》2021年第2期66-70,77,共6页Materials For Mechanical Engineering

摘　　要：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%H_(2)SO_(4)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),统计均值约为36.367 g·m^(-2)·h^(-1),耐硫酸腐蚀性能优良;在死亡绿液以及工业烟气露点(不高于80℃)腐蚀环境中,BGNDMA钢发生均匀腐蚀,2205双相不锈钢则发生点蚀、缝隙腐蚀等局部腐蚀,因此BGNDMA钢有望取代2205双相不锈钢应用于H2 S04-HC1混酸露点腐蚀环境;在工业烟气露点腐蚀环境中,热轧态BGNDMA钢的耐腐蚀性能优于正火态钢的。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.

关 键 词：BGNDMA低合金钢 耐腐蚀性能 H_(2)SO_(4)-HCl混酸腐蚀 均匀腐蚀 热轧 

分 类 号：TG142.79[一般工业技术—材料科学与工程]