Corrosion behaviors of ordinary steel Q345qD and weathering steel in bridges under simulated industrial atmospheric environment were compared and studied through alternate immersion tests.Cross-sectional morphology,composition and phase of the rust layer were analyzed using scanning electron microscopy(SEM)and X-ray diffraction(XRD).The results showed that the corrosion rate of weathering steel in bridges was relatively low under simulated industrial atmospheric environment.The addi-tion of Ni and other alloy elements promoted the transformation of rust layer phase from γ-FeOOH to α-FeOOH,forming a dense and stable internal structure,isolating the infiltration of external S,Si,Mn and other corrosive elements that accelerated the corro-sion of steel,thus exhibiting good resistance to industrial atmospheric corrosion.
关键词
耐候桥梁钢/模拟工业大气环境/周浸腐蚀试验
Key words
weathering steel in bridges/simulated industrial atmospheric environment/alternate immersion tests
维普
万方数据