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Mitigating steel corrosion in reinforced concrete using functional coatings, corrosion inhibitors, and atomistic simulations
https://orcid.org/0000-0002-0554-3501
Abstract We describe new approaches based on compositional manipulation of the cementitious binder, and its geometrical arrangement, to mitigate steel corrosion in concrete, and a new ability to study corrosion processes from a fundamental point of view. First, we present a new approach to mitigate/delay corrosion initiation using calcium aluminate cement (CAC) and Ca(NO3)2 based functional coatings by replacing a fractional thickness of the ordinary portland cement (OPC) concrete cover. Second, within a related framework, we demonstrate how tailoring the binder chemistry to produce enhanced quantities of AFm phases is a significant means to immobilize Cl− ions while actively generating corrosion inhibiting species; thereby delaying corrosion initiation. Finally, we offer new insights from reactive force field molecular dynamics (ReaxFF-MD) simulations as a means to interrogate and explain electrochemical processes at the atomistic scale. We present examples of how atomistic simulations can uncover the origins of passivity and Cl− induced corrosion at a molecular level and how such understanding can accelerate the development of new corrosion resistant materials and mitigation strategies.
Mitigating steel corrosion in reinforced concrete using functional coatings, corrosion inhibitors, and atomistic simulations
https://orcid.org/0000-0002-0554-3501
Abstract We describe new approaches based on compositional manipulation of the cementitious binder, and its geometrical arrangement, to mitigate steel corrosion in concrete, and a new ability to study corrosion processes from a fundamental point of view. First, we present a new approach to mitigate/delay corrosion initiation using calcium aluminate cement (CAC) and Ca(NO3)2 based functional coatings by replacing a fractional thickness of the ordinary portland cement (OPC) concrete cover. Second, within a related framework, we demonstrate how tailoring the binder chemistry to produce enhanced quantities of AFm phases is a significant means to immobilize Cl− ions while actively generating corrosion inhibiting species; thereby delaying corrosion initiation. Finally, we offer new insights from reactive force field molecular dynamics (ReaxFF-MD) simulations as a means to interrogate and explain electrochemical processes at the atomistic scale. We present examples of how atomistic simulations can uncover the origins of passivity and Cl− induced corrosion at a molecular level and how such understanding can accelerate the development of new corrosion resistant materials and mitigation strategies.
Mitigating steel corrosion in reinforced concrete using functional coatings, corrosion inhibitors, and atomistic simulations
https://orcid.org/0000-0002-0554-3501
Abstract We describe new approaches based on compositional manipulation of the cementitious binder, and its geometrical arrangement, to mitigate steel corrosion in concrete, and a new ability to study corrosion processes from a fundamental point of view. First, we present a new approach to mitigate/delay corrosion initiation using calcium aluminate cement (CAC) and Ca(NO3)2 based functional coatings by replacing a fractional thickness of the ordinary portland cement (OPC) concrete cover. Second, within a related framework, we demonstrate how tailoring the binder chemistry to produce enhanced quantities of AFm phases is a significant means to immobilize Cl− ions while actively generating corrosion inhibiting species; thereby delaying corrosion initiation. Finally, we offer new insights from reactive force field molecular dynamics (ReaxFF-MD) simulations as a means to interrogate and explain electrochemical processes at the atomistic scale. We present examples of how atomistic simulations can uncover the origins of passivity and Cl− induced corrosion at a molecular level and how such understanding can accelerate the development of new corrosion resistant materials and mitigation strategies.
Mitigating steel corrosion in reinforced concrete using functional coatings, corrosion inhibitors, and atomistic simulations
Balonis, Magdalena (author) / Sant, Gaurav (author) / Burkan Isgor, O. (author)
Cement and Concrete Composites ; 101 ; 15-23
2018-08-09
9 pages
Article (Journal)
Electronic Resource
English
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