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A Laboratory and Field Assessment of the Performance of Rebar Coatings

Al-Dulaijan, Salah U

Materials, 2023-06, Vol.16 (12), p.4270 [Periódico revisado por pares]

Switzerland: MDPI AG

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Título:
A Laboratory and Field Assessment of the Performance of Rebar Coatings
Autor: Al-Dulaijan, Salah U
Assuntos: Analysis ; anti-corrosion coatings ; Bearing strength ; Cement ; cement-based epoxy coating ; Chloride ; Coatings ; Concrete ; Concrete slabs ; Concrete structures ; Corrosion ; Corrosion potential ; Corrosion resistance ; Density ; Epoxy coatings ; Epoxy resins ; Galvanic corrosion ; Laboratories ; Load carrying capacity ; Performance evaluation ; Polymers ; Potassium ; Primers (coatings) ; Protective coatings ; Reinforced concrete ; reinforcement corrosion ; Reinforcing steels ; salt spray ; Sandblasting ; Steel ; steel primer ; Zinc ; Zinc coatings ; zinc-rich epoxy coating
É parte de: Materials, 2023-06, Vol.16 (12), p.4270
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: Deteriorating concrete structures are repaired to restore their load-carrying capacity and enhance their appearance. As part of the repair procedure, the corroded reinforcing steel bars are cleaned by sandblasting, and a protective coating is applied to protect them from further corrosion. Generally, a zin-rich epoxy coating is used for this purpose. However, there have been concerns about the performance of this type of coating in protecting the steel due to the formation of galvanic corrosion, thus necessitating the need for developing a durable steel coating. In this study, the performance of two types of steel coatings, namely a zinc-rich epoxy and cement-based epoxy resin coating, was investigated. The performance of the selected coatings was evaluated by conducting both laboratory and field experiments. In the field studies, the concrete specimens were exposed to a marine exposure site for more than five years. The salt spray and accelerated reinforcement corrosion studies indicated that the performance of the cement-based epoxy coating was better than the zinc-rich epoxy coating. However, there was no visible difference between the performance of the investigated coatings in the reinforced concrete slab specimens placed in the field. It is suggested to use cement-based epoxy coatings as steel primers based on the field and laboratory data developed in this study.
Editor: Switzerland: MDPI AG
Idioma: Inglês

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A Laboratory and Field Assessment of the Performance of Rebar Coatings

Al-Dulaijan, Salah U

Switzerland: MDPI AG

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