电化学2017，Vol.23Issue(6)：724-731,8.DOI:10.13208/j.electrochem.161020
钙处理对桥梁钢耐大气腐蚀性能的影响
Effect of Calcium on Atmospheric Corrosion Resistance of Bridge Steel
摘要
Abstract
The corrosion behavior of bridge steel in simulated hot and humid industrial-marine atmosphere was investigated by corrosion depth analysis,XRD,SEM,electrochemical methods and a wet/dry alternate immersion corrosion test using 0.1 mol· L-1 NaCl + 0.01 mol· L-1 NaHSO3 solutions.The corrosion depth (W) of experimental steels before and after calcium treatment versus time (t) curves showed a good agreement with the power function of W =Atn.The corrosion products were mainly composed of amorphous phase and a small amount of crystals including α-FeOOH,β-FeOOH,γ-FeOOH and Fe3O4.Trace calcium could promote the formation of ferrite and strengthen the protective film on steel surface to prevent the rapid corrosion of bare steel.It could also refine the grain of steel structure and inhibit the crystal transformation of corrosion products,accordingly,refine the particles of corrosion products and reduce the defects in rust layer,and finally,improve the density of rust layer.关键词
钙处理/桥梁钢/工业-海洋大气/湿热环境/锈层Key words
Ca treatment/bridge steel/industry-marine atmosphere/hot and humid environment/rust layer分类
矿业与冶金引用本文复制引用
李东亮,付贵勤,朱苗勇..钙处理对桥梁钢耐大气腐蚀性能的影响[J].电化学,2017,23(6):724-731,8.基金项目
国家自然科学基金项目(No.51304040)和教育部基本科研业务费项目(No.N150204008)资助 （No.51304040）
