经济型Cu—P-Cr耐候钢微细组织及耐蚀性研究  

Microstructure and Corrosion Resistance of Cu-P-Cr Economic Weathering Steel

作　　者：邸全康[1] 王全礼[1] 晁月林[1] 周玉丽[1] 王立峰[1] 

机构地区：[1]首钢技术研究院

出　　处：《首钢科技》2013年第5期30-35,共6页Shougang Science and Technology

摘　　要：在0．01mol／L的NaHSO，溶液中，测定了Cu-P-Cr钢和Cu—P—Cr—Ni钢的极化曲线及周浸腐蚀失重，研究了其组织及耐蚀性。结果表明，Cu-P-Cr钢48，72h耐蚀性略低于Cu-P-Cr-Ni钢，但随着周浸时间的加长，96h时，Cu-P-Cr钢失重率低于Cu-P-Cr-Ni钢；2种钢在72，96h相对Q235钢的腐蚀速率分别为0．595，0．529和0．546，0．596。在经济型耐蚀钢中，细化原奥氏体晶粒可提高耐蚀性；通过控制连铸和轧制工艺，铜、铬钒和锰协同形成复合相，抑制了单相铜在表面或晶界处富集。Polarization curves and immersion corrosion weight loss of Cu-P-Cr and Cu-P-Cr-Ni steel were determined in 0. 01 mol/L NaHSO3 solution. Microstructure and corrosion resistance of them were researched, too. The result shows that the corrosion resistance of Cu-P-Cr steel is lower than Cu-P-Cr-Ni steel under 48, 72 h, but as the time of cycle weightlessness rate of Cu-P-Cr steel is less than Cu-P-Cr-Ni steel. erosion increased to 96 hours, Aaverage weightlessness rate of them is 0. 595 and 0. 529 respectivly at 72 h cycle erosion, 0. 546 and 0. 596 respectivly at 96 h. Refinement of austenite grain size can improve corrosion resistance; Cu, Cr, Mn, V synergistic effect can effectively suppress the single-phase Cu enrichment on surface.

关 键 词：耐候钢 周浸 极化曲线 组织 耐蚀性 

分 类 号：TG142.7[一般工业技术—材料科学与工程]