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首页> 外文期刊>Corrosion >Corrosion of Epoxy-Coated Rebar in Marine Bridges-Part 1: A 30-Year Perspective
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Corrosion of Epoxy-Coated Rebar in Marine Bridges-Part 1: A 30-Year Perspective

机译：船用桥梁中环氧涂层钢筋的腐蚀-第1部分：30年的前景

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摘要

The corrosion performance over a nearly 30-year service period of epoxy-coated rebar (ECR) in Florida marine bridges is presented. Severe ECR corrosion was noted earlier in several of those bridges, built with relatively high permeability concrete. Corrosion development took place later in some other structures with less permeable concrete, with instances where the corrosion was associated with preexisting cracks. Corrosion was found to be associated with coating imperfections and coating disbondment. Laboratory experiments and modeling indicated that macrocell coupling with remote cathodes was an aggravating factor. Quantitative damage functions relating the observed deterioration with service time of the affected bridges are presented. A predictive corrosion initiation-propagation model was developed and the model output is compared with the field results to identify suitable parameters for forecasting future rehabilitation needs. The prognosis for future corrosion development is discussed, with attention to corrosion of ECR in otherwise low-permeability concrete with preexisting cracks or local deficiencies. [PUBLICATION ABSTRACT]
机译：介绍了在佛罗里达海事桥梁中，环氧涂层钢筋（ECR）在近30年使用期内的腐蚀性能。早些时候，在那些使用相对高渗透性混凝土建造的桥梁中，注意到了严重的ECR腐蚀。后来，在其他一些渗透性较低的混凝土结构中，发生了腐蚀，其中腐蚀与先前存在的裂缝有关。发现腐蚀与涂层缺陷和涂层剥离有关。实验室实验和建模表明，宏电池与远端阴极的耦合是一个加剧的因素。提出了将观测到的劣化与受影响桥梁的使用时间联系起来的定量损伤函数。开发了可预测的腐蚀萌生传播模型，并将模型输出与现场结果进行比较，以确定用于预测未来康复需求的合适参数。讨论了未来腐蚀发展的预后，并注意在其他早已存在裂缝或局部缺陷的低渗透混凝土中ECR的腐蚀。 [出版物摘要]

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    《Corrosion》 |2010年第6期|p.1-13|共13页
  • 作者

    A A Sagüés K Lau R G Powers R J Kessler;

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    A.A. Sagüés,*K. Lau** R.G. Powers,** and RJ. Kessler***Submitted for publication December 18. 2009, in revised form. February 24, 2010.* Corresponding author. E-mail: klau@mall.usf.edu.* Department of Civil and Environmental Engineering, University of South Florida, 4202 E. Fowler Ave. ENBl 18, Tampa, FL 33620.** State Materials Office, Florida Department of Transportation, 5007 NE 39th Ave., Gainesville, FL 32609. Present address: Rodney G. Powers and Associates. 3932 NW 43rd Court, Gainesville, FL 32606.*** State Materials Office, Florida Department of Transportation. 5007 NE 39th Ave., Gainesville, FL 32609.,;

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