Research and Development of Low Alloy Corrosion-resistant Rebar in Plateau Area Driven by Big Data on Corrosion
With the traditional HRB400 rebar as the substrate,Cr and RE elements were introduced by microalloying technology to design and prepare two new types of low-alloy rebar.Continuous real-time corrosion data and environmental data were obtained through outdoor exposure test,and the influence of temperature and humidity on the corrosion laws of three kinds of rebar materials was deeply analyzed by using corrosion big data technology.Their corrosion resistance was quantitatively evaluated.The results showed that the corrosion current density was closely related to relative humidity.The transient current clock diagram revealed that the corrosion of the three kinds of steel rebars mainly occured in the period from evening to morning.The analysis of the cumulative corrosion energy showed that the corrosion resistance of the three kinds of steel rebars was in the following order:HRB400-Cr-RE>HRB400-Cr>HRB400,indicating that the addition of Cr and RE significantly improved the corrosion resistance of HRB400 steel rebars,especially the combined use of Cr and RE,its corrosion resistance improvement effect was significantly better than the addition of Cr alone.In addition,by comparing the cumulative corrosion energy data of the two test sites,it was found that the time of the three kinds of steel rebars reaching the stable corrosion state in Bomi was later than that in Basu,which indicated that the environmental conditions of Bomi were more severe and the corrosion degree of steel rebars was more serious.The use of corrosion big data technology can not only accurately reveal the evolution law of corrosion resistance of steel bars,but also provide an important data basis and scientific guidance for the development of low alloy corrosion resistant steel bars in complex and harsh environments.
plateau arealow alloy steel rebarcorrosion resistancecorrosion big data
万方数据
维普
