Implications of grout condition on galvanic coupling and hydrogen absorption within post-tensioned bridge tendons constructed with galvanized steel ducts

IF 1.1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Pub Date : 2024-07-25 DOI:10.5006/4590

David Dukeman, Christopher L. Alexander

引用次数: 0

Abstract

There has been concern that prestressing structural steel contained within galvanized bridge tendon ducts may become embrittled due to excessive galvanic coupling with the duct of which may be exacerbated by deficiencies within the grout fill. The objective of this work is to quantify the level of galvanic coupling achievable as a function of grout condition and to assess whether such conditions may promote water reduction and hydrogen absorption. Experimental tendon assemblies were used to quantify galvanic coupling considering a single prestressing steel wire and various grout conditions. The results were related to more realistic geometric configurations by simulations considering a range of possible kinetic boundary conditions. A model is used to estimate the amount of hydrogen that may be absorbed as a function of time considering the coupling current density.

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灌浆条件对使用镀锌钢管施工的后张法桥筋内电偶耦合和氢吸收的影响

人们一直担心，镀锌桥筋导管内的预应力结构钢可能会由于与导管之间过度的电化耦合而脆化，而灌浆填充物的缺陷可能会加剧这种情况。这项工作的目的是量化作为灌浆条件函数的电偶耦合水平，并评估这种条件是否会促进水分减少和氢气吸收。在考虑到单根预应力钢丝和各种灌浆条件的情况下，使用了实验筋组件来量化电偶耦合。通过模拟考虑一系列可能的动力学边界条件，将结果与更现实的几何配置联系起来。考虑到耦合电流密度，使用一个模型来估算可能吸收的氢量与时间的函数关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Corrosion MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

2.80

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： CORROSION is the premier research journal featuring peer-reviewed technical articles from the world’s top researchers and provides a permanent record of progress in the science and technology of corrosion prevention and control. The scope of the journal includes the latest developments in areas of corrosion metallurgy, mechanisms, predictors, cracking (sulfide stress, stress corrosion, hydrogen-induced), passivation, and CO2 corrosion. 70+ years and over 7,100 peer-reviewed articles with advances in corrosion science and engineering have been published in CORROSION. The journal publishes seven article types – original articles, invited critical reviews, technical notes, corrosion communications fast-tracked for rapid publication, special research topic issues, research letters of yearly annual conference student poster sessions, and scientific investigations of field corrosion processes. CORROSION, the Journal of Science and Engineering, serves as an important communication platform for academics, researchers, technical libraries, and universities. Articles considered for CORROSION should have significant permanent value and should accomplish at least one of the following objectives: • Contribute awareness of corrosion phenomena, • Advance understanding of fundamental process, and/or • Further the knowledge of techniques and practices used to reduce corrosion.