Some reinforced concrete structures prematurely corrode as they age, with significant financial implications, but it is not immediately clear why some are more durable than others. This book looks at the various mechanisms for corrosion and how what seemed to be a relatively simple matter has become more complex the further it is understood due to the properties of concrete, steel and the way reinforced concrete structures are constructed. The significance of electrochemical processes is identified with recent research using new technology discussed.
Specialist contractors, consultants and owners of corrosion damaged structures will find this an extremely useful resource. It will also be a valuable reference for students at postgraduate level.
Author(s): Paul Chess
Publisher: CRC Press
Year: 2023
Language: English
Pages: 80
City: Boca Raton
Cover
Half Title
Title Page
Copyright Page
Table of Contents
1 Electrochemical Processes
1.1 Introduction
References
2 Concrete and Steel Composition
2.1 Description of Concrete
2.2 Flow in Porous Materials
2.3 Steel Rebar
2.4 The Steel-Concrete Interface (SCI)
References
3 The Relationship Between Chloride Level and Corrosion
3.1 Introduction
3.2 Laboratory Research on Corrosion Threshold Level and Thereafter Corrosion Rate
3.3 Surveys on Real Structures for a Chloride Corrosion Threshold Level and Active Corrosion Rate
3.4 Review of Corrosion Threshold Level
3.5 The Effect of the Structures Shape on Corrosion
3.6 The Effect of Chloride on Pitting Corrosion
3.7 Conclusions
References
4 Ionic Solvation and Transport
4.1 Ionic Movement Through Water Without a Potential Difference
4.2 Ionic Movement Through Water with a Potential Difference
4.3 Ionic Movement Through Concrete with a Potential Difference
4.4 Changes to the Steel with the Flow of Ions Caused by a Potential Difference
4.5 Chloride Movement Through Reinforced Concrete with Cracks
References
5 Passivation and Depassivation
5.1 Introduction
5.2 Film Formation
5.3 Breakdown of the Film
References
6 Electrochemical Theory
6.1 Introduction
6.2 Reversible Potential and the Single Electrode
6.3 Electrochemical Cells
6.4 Reversible Electrodes and the Nernst Equation
6.5 The Potential PH Diagram
6.6 Tafel Plot and Evans Diagram
6.7 Combining Reduction and Oxidation in an Evans Diagram
6.8 Polarisation Curves
6.9 Linear Polarisation Resistance
6.10 Acoustic Emission
6.11 Conclusions
References
7 Electrochemistry Reality of Steel in Concrete
7.1 Introduction
7.2 Tafel Slopes Measured of Steel in Simulated Pore Solutions (SPS)
7.3 Tafel Slopes Measured of Steel in Concrete
7.4 Corrosion Rates Recorded in Active and Passive Steel in Reinforced Concrete
7.5 Passive and Active Corrosion Potentials Measured in Reinforced Concrete Structures
7.6 Modelling for Life Expectancy and Reality
7.7 Non-Destructive Testing for Corrosion of Steel in Concrete
7.8 Conclusions
References
8 State of the Art
References
Index
