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Effect of Aluminum Tri-polyphosphate on Corrosion Behavior of Reinforcing Steel in Seawater Prepared Coral Concrete

查看全文 作　　者：[1,2,3]冯兴国;ZHANG [1]Leyuan;ZHANG [1]Jing;[1]卢向雨;XU [1]Yiwen;ZHANG [1]Xiangying;SHI [1]Ruilong;CHEN [1]Da 高影响力作者 机构地区：[1]Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security,Hohai University,Nanjing 210098,China;[2]State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China;[3]Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology a nd Engineering,Chinese Academy of Sciences,Ningbo 315201,China高影响力机构 出　　处：《Journal of Wuhan University of Technology(Materials Science)》索引2019年第34卷第4期,共8页高影响力期刊 基　　金：Found by the National Natural Science Foundation of China(No.51601074);the Fundamental Research Funds for the Central Universities(Nos.2018B56714 and 2018B07214);the Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection(Chengdu University of Technology)(No.SKLGP2017K011);the Foundation of Key Laboratory of Marine Materials and Related Technologies,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences(No.2017K08) 摘　　要：Atri-polyphosphate was used as a corrosion inhibitor in the seawater prepared coral concrete, and its influence on the corrosion behavior of carbon steel, 304 austenitic stainless steel, and 2205 duplex stainless steel was studied by the open-circuit potential, electrochemical impedance spectroscopy, and potentiodynamic polarization, respectively. The results reveal that the corrosion potential and impedance of the reinforcing steel increase, while the corrosion current density decreases with the content of aluminum tripolyphosphate in the coral concrete. A low content of the corrosion inhibitor significantly retards the corrosion of the two stainless steels, but it cannot effectively inhibit the corrosion of the carbon steel in the coral concrete.In general, the carbon steel is unsuitable for the coral concrete for its poor corrosion resistance. In contrast,the stainless steels, especially the 2205 duplex stainless steel, shows an excellent anti-corrosion property in the seawater prepared coral concrete containing a certain amount of inhibitor, which is one of the satisfactory candidate methods to build the long-life coral concrete constructions. 关 键 词：CORAL CONCRETE corrosion surfaces STAINLESS steel electrochemical tests
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