Effect of NaNO2and C6H15NO3Synergistic Admixtures on Steel-Rebar Corrosion in Concrete Immersed in Aggressive Environments-Reference-Cited by-同舟云学术

Effect of NaNO2and C6H15NO3Synergistic Admixtures on Steel-Rebar Corrosion in Concrete Immersed in Aggressive Environments

Published:2015 Issue: Volume:2015 Page:1-11
ISSN:1687-8434
Container-title:Advances in Materials Science and Engineering
language:en
Short-container-title:Advances in Materials Science and Engineering

Author:

Okeniyi Joshua Olusegun¹,Popoola Abimbola Patricia Idowu²,Loto Cleophas Akintoye¹²,Omotosho Olugbenga Adeshola¹,Okpala Stanley Okechukwu¹,Ambrose Idemudia Joshua¹

Affiliation:

1. Mechanical Engineering Department, Covenant University, Ota 112001, Nigeria

2. Chemical and Metallurgical Engineering Department, Tshwane University of Technology, Pretoria 0001, South Africa

Abstract

This paper studies effect of different combinations of NaNO2(sodium nitrite) and C6H15NO3(triethanolamine (TEA)), as synergistic admixtures in concrete immersed in NaCl and in H2SO4test environments, on the corrosion of the concrete reinforcing steel (rebar). Although statistically analysed electrochemical test results confirmed NaNO2effectiveness, synergistic combinations of 4 g NaNO2+ 4 g C6H15NO3in NaCl medium and of 2 g NaNO2+ 6 g C6H15NO3in H2SO4medium were also highly effective at inhibiting rebar corrosion. Synergistic parameter analyses showed that the effective synergistic admixtures that inhibited concrete steel-rebar corrosion in their respective medium were the NaNO2and C6H15NO3combinations that exhibited synergistic interactions of cooperative adsorption on steel-rebar. These support the suitability of requisite concentration of triethanolamine as additive admixture with sodium nitrite for steel-rebar corrosion mitigation, which is potent with reduced environmental effects, in concrete immersed in NaCl and in H2SO4corrosive media.

Publisher

Hindawi Limited

Subject

General Engineering,General Materials Science

Link

http://downloads.hindawi.com/journals/amse/2015/540395.pdf

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