The corrosion behavior of Q235 carbon steel in typical atmospheric environments in Dazhou is studied by 1-year outdoor exposure test,corrosion rate analysis,rust layer morphology observation,rust layer composition analysis and electrochemical test.The results show that the corrosion rate of Q235 carbon steel is 23.78 μm/a in Tongchuan district of Dazhou,which is located in industrial atmosphere,while the corrosion rate of Q235 carbon steel is only 10.33 μm/a in Wanyuan of Dazhou,which is located in rural atmosphere.The surface corrosion products are mainly composed of γ-FeOOH,α-FeOOH and Fe3O4.The electrochemical results show that the corrosion of carbon steel in heavy industrial environment of Dazhou is more serious,and its resistance of corrosion product scale and charge transfer resistance are higher than that in rural environment of Dazhou,which indicates that the surface rust layer could effectively protect the substrate and slow down further corrosion of the substrate.
carbon steelatmospheric corrosionheavy industrial pollution of environment
NETL
NSTL
万方数据
