Monitoring Corrosion of Steel Bars in Reinforced Concrete Structures

Table 4

Techniques to protect concrete from corrosion.

Protective techniques	Reference
Fly ash increased the corrosion resistance of concrete by reducing porosity of concrete porosity, which decreases penetration rate of harmful ions.	Xu et al., 2012 [26]
Super-plasticizers and mineral admixtures like fly ash, granulated blast furnace slag, and pozzolanic materials reduce the corrosion rate.	Maslehuddin et al., 1992 [27]
Use of low-nickel stainless steel rebars reduces corrosion rate by providing high alkaline concrete pore solution	Criado et al., 2011 [28]
Penetrating amino alcohol corrosion inhibitor reduces the steel corrosion.	Jamil et al., 2005 [29]
Calcium nitrite based corrosion inhibitor reduces the carbonation depth	Sideris and Savva, 2005 [30]
Calcium nitrite based inhibitor improves the chloride threshold value.	Ann et al., 2006 [31]
Benzotriazole as a corrosion inhibitor improves corrosion resistance.	Ann et al., 2006 [31]
Polyvinylpyrrolidone improves corrosion resistance of concrete when added.	Gürten et al., 2005 [32]
Alkylamino alcohol increases the corrosion resistance.	Morris and Vázquez 2002 [33]
Fusion bonded epoxy coated (FBEC) steel bars are beneficial in decreasing corrosion.	Al-Dulaijan et al., 2012 [34]; Darwin and Scantlebury, 2002 [35]
Alkanolamine based corrosion inhibitor with inorganic coating.	Batis et al., 2003 [36]
Steel bars coated with DINITROL AV 30 shows good corrosion resistance.	Monticelli et al., 2000 [37]
Use of double combination of calcium nitrite and ground granulated blast furnace slag (GGBFS), and triple combination of calcium nitrite, silica fume, and fly ash/GGBFS protect concrete exposed to severe corrosive environments.	Civjan et al., 2005 [38]
Aminoalcohol based mixed (organic/inorganic) inhibitors, when used as admixture or as a repair product, reduces the rate of corrosion.	Wombacher et al., 2004 [39]
ZnO reduces the concrete porosity and chloride content at rebar level and reduces the corrosion	de Rincón et al., 2002 [40]
By providing high chromium steel, corrosion rate can be decreased.	Nachiappan and Cho, 2005 [41]
CFRP laminates reduce the expansion caused by corrosion and also control the corrosion rate by decreasing the loss of mass.	Badawai and Soudki, 2005 [42]