Chloride induced reinforcement corrosion: Electrochemical monitoring of initiation stage and chloride threshold values

被引：191

作者：

Angst, Ueli M. ^{[1
]}

Elsener, Bernhard ^{[2
,3
]}

Larsen, Claus K. ^{[1
,4
]}

Vennesland, Oystein ^{[1
]}

机构：

[1] NTNU Norwegian Univ Sci & Technol, Dept Struct Engn, N-7491 Trondheim, Norway

[2] ETH Honggerberg, Inst Bldg Mat IfB, ETH Zurich, CH-8093 Zurich, Switzerland

[3] Univ Cagliari, Dept Inorgan & Analyt Chem, I-09142 Cagliari, Italy

[4] Norwegian Publ Rd Adm, N-0033 Oslo, Norway

来源：

CORROSION SCIENCE | 2011年 / 53卷 / 04期

关键词：

Steel reinforced concrete; Polarisation; Pitting corrosion; Repassivation; CONCRETE RESISTIVITY MEASUREMENTS; SPECIMEN SIZE; FLY-ASH; ELECTRICAL-RESISTIVITY; CONTAMINATED CONCRETE; PORE SOLUTIONS; STEEL; POTENTIALS; INTERFACE; DIFFUSION;

D O I：

10.1016/j.corsci.2011.01.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Reinforcement steel embedded in six different concrete mixes was exposed to chloride by wetting/drying cycles. Various parameters were continuously monitored during more than 1 year. Cement replacement with fly ash had beneficial long-term effects regarding chloride penetration resistance. Concerning corrosion performance, by far the most dominant influencing parameter was the steel/concrete interface since corrosion initiated on the lower side of the rebar (with respect to casting direction) regardless of binder type and w/b ratio. In many cases, after the first signs of depassivation, a marked increase in chloride content was required to prevent repassivation and to enable stable pit growth. (c) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1451 / 1464

页数：14

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