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Corrosion inhibitor systems for rebar in concrete structures
Two types of emerging technologies to mitigate corrosion in reinforced concrete structures were demonstrated at military installations in highly corrosive environments. The first technology consisted of surface-applied corrosion inhibitors, while the second was a surface-applied sacrificial cathodic protection coating. The corrosion inhibitor system consisted of (1) an ionic-anodic type of inorganic penetrating corrosion inhibitor, (2) an organic vapor phase penetrating corrosion inhibitor, and (3) a reactive silicone surface protection agent. The combined application of these three corrosion-inhibiting formulations provided a durable and multifunctional corrosion-inhibiting environment along with a reduction in water penetration rate. The sacrificial cathodic coating system consisted of an inorganic silicate vehicle containing zinc, aluminum, magnesium, and indium metal powders. The coating was applied to a reinforced concrete surface along with titanium mesh strips that were connected to the rebar to conduct cathodic current. Before and after measurements indicated that corrosion rates of the rebar were reduced by a factor of 3.5 for the penetrating corrosion inhibitor and 2.7 for the sacrificial cathodic protection coating. Water permeation rates were also significantly reduced. The results indicated that properly selected and applied penetrating corrosion inhibitors or sacrificial cathodic coating systems can be successfully used to extend the life of reinforced concrete structures by reducing corrosion rates.
Corrosion inhibitor systems for rebar in concrete structures
Two types of emerging technologies to mitigate corrosion in reinforced concrete structures were demonstrated at military installations in highly corrosive environments. The first technology consisted of surface-applied corrosion inhibitors, while the second was a surface-applied sacrificial cathodic protection coating. The corrosion inhibitor system consisted of (1) an ionic-anodic type of inorganic penetrating corrosion inhibitor, (2) an organic vapor phase penetrating corrosion inhibitor, and (3) a reactive silicone surface protection agent. The combined application of these three corrosion-inhibiting formulations provided a durable and multifunctional corrosion-inhibiting environment along with a reduction in water penetration rate. The sacrificial cathodic coating system consisted of an inorganic silicate vehicle containing zinc, aluminum, magnesium, and indium metal powders. The coating was applied to a reinforced concrete surface along with titanium mesh strips that were connected to the rebar to conduct cathodic current. Before and after measurements indicated that corrosion rates of the rebar were reduced by a factor of 3.5 for the penetrating corrosion inhibitor and 2.7 for the sacrificial cathodic protection coating. Water permeation rates were also significantly reduced. The results indicated that properly selected and applied penetrating corrosion inhibitors or sacrificial cathodic coating systems can be successfully used to extend the life of reinforced concrete structures by reducing corrosion rates.
Corrosion inhibitor systems for rebar in concrete structures
Stephenson, L.D. (author) / Kumar, Ashok (author)
2009
10 Seiten, 4 Quellen
Conference paper
English
anorganischer Überzug , Anwendung in der Wehrtechnik , Bewehrungsstahl , Hochleistungsbeton , kathodischer Schutz , Korrosionsbeständigkeit , Korrosionsinhibierung , Korrosionsinhibitor , Korrosionsprüfung , Korrosionsschutzschicht , oberflächenaktiver Zusatz , Polymerbeschichtung , Silicon (Polymer) , Stahlbeton , Stahlkorrosion , Wasserpermeabilität
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