一种460MPa高强度桥梁钢的耐蚀性能  

Corrosion Resistance of a 460MPa High-Strength Bridge Steel

作　　者：高彩茹[1] 杜林秀[1] 王磊[1] 王彦锋[2] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004 [2]首钢技术研究院,北京100041

出　　处：《东北大学学报（自然科学版）》2009年第10期1425-1428,共4页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究发展计划项目(2003AAG010)

摘　　要：对采用TMCP工艺在实验室热轧研制的Q460qNH钢的耐蚀性能进行研究,采用干湿交替实验室加速腐蚀实验(ACT)和电化学实验测极化曲线研究了Q460qNH的耐蚀性能.与某厂生产的高强度桥梁钢Q460q和耐蚀性能优良的SPA-H耐候钢进行了对比,结果表明Q460qNH钢的耐蚀性能与SPA-H钢的接近,但明显高于Q460q钢;在普通Q460q桥梁钢中加入0.2%～0.3%Cr,0.15%～0.25%Ni,0.2%～0.3%Cu就可以使其耐大气腐蚀性能显著提高.A high-strength bridge steel, Q460qNH, was newly developed in lab via TMCP technology and its corrosion resistance was investigated through the wet-dry alternating accelerated corrosion tests and polarization curves resulting from electro-chemical experiment. Comparing Q460qNH with the high-strength bridge steel Q460q supplied by a certain steelmaking plant and the high-quality weathering steel SPA-H, the results show that the corrosion resistance of Q460qNH approaches that of SPA-H and is obviously higher than Q460q. The weathering resistance of Q460q can be obviously improved if adding 0.2 % - 0.3 % Cr, 0.15 % - 0.25%Ni,0.2%-0.3%Cu as alloying elements in it.

关 键 词：高强桥梁钢 耐蚀性能 加速腐蚀 电化学试验 极化曲线 

分 类 号：TG133[一般工业技术—材料科学与工程] TQ153.2[金属学及工艺—合金]