Pitting corrosion model for reinforced concrete structures in a chloride environment
- 1 February 2010
- journal article
- Published by Thomas Telford Ltd. in Magazine of Concrete Research
- Vol. 62 (2), 91-101
- https://doi.org/10.1680/macr.2008.62.2.91
Abstract
Different types of corrosion may arise in steel reinforcement, such as general corrosion, pitting corrosion, hydrogen embrittlement, stress corrosion cracking and corrosion fatigue. However, corrosion of steel reinforcement in reinforced concrete (RC) structures can be classified into two categories: general (uniform) corrosion and pitting (localised) corrosion. In general, concrete researchers use uniform corrosion to study the effect of corrosion on RC structures. This approach is not accurate for concrete structures subjected to chloride attack, which usually experiences pitting corrosion. This paper describes an accelerated corrosion test used to obtain statistical parameters of maximum pit-depths distribution of corroded steel in a RC structure. Using probabilistic analysis, these statistical parameters are combined with statistical parameters of RC beams (i.e. beam dimensions, concrete strength, steel yield strength, cover thickness, workmanship quality, in situ strength factor, model error for flexure and shear and also corrosion rate) to determine the effect of corrosion on flexural and shear strength of RC beams. Using the proposed pitting corrosion model improves service life prediction of RC structures in a chloride environment.Keywords
This publication has 24 references indexed in Scilit:
- Pitting Corrosion—A Review of Recent Advances in Testing Methods and InterpretationPublished by ASTM International ,2009
- A proposed empirical corrosion model for reinforced concreteProceedings of the Institution of Civil Engineers - Structures and Buildings, 2000
- Effects of cyclic chloride exposure on penetration of concrete coverCement and Concrete Research, 1999
- An overview and sensitivity study of a multimechanistic chloride transport modelCement and Concrete Research, 1999
- The derivation of input data for modelling chloride ingress from eight-year UK coastal exposure trialsMagazine of Concrete Research, 1999
- Factors controlling cracking of concrete affected by reinforcement corrosionMaterials and Structures, 1998
- Comparison of rates of general corrosion and maximum pitting penetration on concrete embedded steel reinforcementCement and Concrete Research, 1995
- Cover cracking as a function of bar corrosion: Part I-Experimental testMaterials and Structures, 1993
- Chloride ingress measurements and corrosion potential mapping study of a 24-year-old reinforced concrete jetty structure in a tropical marine environmentMagazine of Concrete Research, 1992
- Statistical Modeling of Pitting Corrosion and Pipeline ReliabilityCorrosion, 1990