Performance of organic and inorganic functional groups as corrosion inhibitors in concrete experiencing extreme corrosive environment
By: Guleria, Himanshu
.
Contributor(s): Purnima.
Publisher: Thane ACC LTD 2021Edition: Vol.95(4), April.Description: 29-37p.Subject(s): Civil EngineeringOnline resources: Click here
In:
Indian Concrete Journal - ICJSummary: Reinforcement corrosion is the major durability issue causing premature failure of reinforced concrete structures. Ingress of chloride and atmospheric CO2 are two important phenomena promoting the corrosion, but combined effect of these two causes even more severe damage than individual environment. The corrosion inhibition mechanism of various compounds depends upon the presence of functional group in their molecular structure. The present study deals with determination of the inhibition efficiency of organic and inorganic based compounds in combined chloride and carbonated environment. The aggressive environment was achieved by subjecting specimen to alternate wetting-drying-carbonation cycles. Specimen was wetted by ponding in 5% NaCl solution followed by air drying and exposed to carbonation by using environment chamber. The results show that compound containing organic functional group was able to reduce corrosion rate in combined environment, while inorganic inhibitor was unable to perform in aggressive conditions. Chloride and carbonation profile also shows that organic functional group-based inhibitor blocks the pores and resists the movement of aggressive chloride ions and carbonation front.
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Articles Abstract Database
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School of Engineering & Technology (PG) Archieval Section | Not for loan | 2021-2022098 |
Reinforcement corrosion is the major durability issue causing premature failure of reinforced concrete structures. Ingress of chloride and atmospheric CO2 are two important phenomena promoting the corrosion, but combined effect of these two causes even more severe damage than individual environment. The corrosion inhibition mechanism of various compounds depends upon the presence of functional group in their molecular structure. The present study deals with determination of the inhibition efficiency of organic and inorganic based compounds in combined chloride and carbonated environment. The aggressive environment was achieved by subjecting specimen to alternate wetting-drying-carbonation cycles. Specimen was wetted by ponding in 5% NaCl solution followed by air drying and exposed to carbonation by using environment chamber. The results show that compound containing organic functional group was able to reduce corrosion rate in combined environment, while inorganic inhibitor was unable to perform in aggressive conditions. Chloride and carbonation profile also shows that organic functional group-based inhibitor blocks the pores and resists the movement of aggressive chloride ions and carbonation front.
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