Chloride-Induced Rebar Corrosion in Concrete: Mechanism, Prevention, Monitoring and Assessment Webinar
- Chloride-Induced Rebar Corrosion in Concrete: Mechanism, Prevention, Monitoring and Assessment
Dr. Fujian Tang
- Dalian University of Technology
Chloride-induced steel rebar corrosion is one of the main causes of reinforced concrete (RC) structural deterioration, and it is estimated that the annual direct corrosion cost for highway bridges was around $8B in the U.S. according to a report released by NACE international in 2002. This lecture gives an overview of chloride-induced rebar corrosion and consists of four parts: corrosion mechanism, corrosion prevention techniques, corrosion monitoring techniques, and methods used to assess corrosion-induced RC deterioration. Passivation process of steel rebar, chloride transportation in concrete, corrosion initiation, and corrosion propagation are introduced in part I. Part II is focused on corrosion prevention techniques such as use of protective coatings, addition of corrosion inhibitors, application of high performance admixtures, and cathodic protection. Part III deals with electrochemical-based monitoring techniques such as half-cell potential, linear polarization resistance and electrochemical impedance spectroscopy, as well as non-electrochemical-based methods such as acoustic emission and optical fiber corrosion sensors, the advantages and disadvantages of these techniques are compared. In part IV, probabilistic based method to assess corrosion-induced RC structural degradation is briefly introduced.
Dr. Fujian Tang is an Associate Professor in the School of Civil Engineering at Dalian University of Technology, China. He received his B.S in Civil Engineering from University of South China in 2004, and Ph.D. degree in Civil Engineering in December 2013 from Missouri University of Science and Technology (Missouri S&T, Formerly University of Missouri-Rolla). During his Ph.D. study, Dr. Tang also received the M.S. degree in Materials Science and Engineering at Missouri S&T. He was a Postdoctoral Fellow at Missouri S&T from January 2014 to November 2016 and a Postdoctoral Research Associate at Florida Atlantic University from December 2016 to August 2017. His research interests mainly include electrochemical corrosion of steel rebar, characterization of protective coatings, and development of optical fiber corrosion sensors. As of today, he has over 40 publications in the area of corrosion science and engineering including 28 peer-reviewed journal papers, 13 conference papers and 3 technical reports. He is also a member of NACE International, ASCE, the Electrochemical Society, SPIE, and IEEE.