Total-Corrosion Effects of Anthocleista Djalonensis and Na2Cr2O7 on Steel-Rebar in H2SO4: Sustainable Corrosion-Protection Prospects in Microbial/Industrial Environment

REWAS 2016 ◽  
2016 ◽  
pp. 187-192 ◽  
Author(s):  
Joshua Olusegun Okeniyi ◽  
Cleophas Akintoye Loto ◽  
Abimbola Patricia Idowu Popoola
Keyword(s):  
Corrosion Protection ◽  
Industrial Environment ◽  
Steel Rebar

Biochemical Characterisation of the Leaf of Morinda Lucida: Prospects for Environmentally-Friendly Steel-Rebar Corrosion-Protection in Aggressive Medium

2015 ◽  
pp. 635-644 ◽  
Author(s):  
Joshua Olusegun Okeniyi ◽  
Olubanke Olujoke Ogunlana ◽  
Oluseyi Ebenezer Ogunlana ◽  
Taiwo Felicia Owoeye ◽  
Elizabeth Toyin Okeniyi
Keyword(s):  
Corrosion Protection ◽  
Aggressive Medium ◽  
Environmentally Friendly ◽  
Steel Rebar ◽  
Biochemical Characterisation ◽  
Rebar Corrosion

scholarly journals Anticorrosion Behaviour of Rhizophora mangle L. Bark-Extract on Concrete Steel-Rebar in Saline/Marine Simulating-Environment

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Joshua Olusegun Okeniyi ◽  
Jacob Olumuyiwa Ikotun ◽  
Esther Titilayo Akinlabi ◽  
Elizabeth Toyin Okeniyi
Keyword(s):  
Corrosion Rate ◽  
Corrosion Protection ◽  
Plant Extract ◽  
Corrosion Potential ◽  
Rhizophora Mangle ◽  
Corrosion Current ◽  
Positive Control ◽  
Bark Extract ◽  
Steel Rebar ◽  
Mathematical Correlation

This paper investigates anticorrosion behaviour of the bark-extract from Rhizophora mangle L. on steel-rebar in concrete slabs in 3.5% NaCl medium of immersion (for simulating saline/marine environment). Corrosion-rate, corrosion-current, and corrosion-potential were measured from the NaCl-immersed steel-reinforced concrete cast with admixture of different plant-extract concentrations and from positive control concrete immersed in distilled water. Analyses indicate excellent mathematical-correlation between the corrosion-rate, concentration of the bark-extract admixture, and electrochemical noise-resistance (ratio of the corrosion-potential standard deviation to that of corrosion-current). The 0.4667% Rhizophora mangle L. bark-extract admixture exhibited optimal corrosion-inhibition performance, η = 99.08±0.11% (experimental) or η = 97.89±0.24% (correlation), which outperformed the positive control specimens, experimentally. Both experimental and correlated results followed Langmuir adsorption isotherm which suggests prevalent physisorption mechanism by the plant-extract on the reinforcing-steel corrosion-protection. These findings support Rhizophora mangle L. bark-extract suitability for corrosion-protection of steel-rebar in concrete structure designed for immersion in the saline/marine environmental medium.

scholarly journals Enhancing of Corrosion Protection of Steel Rebar in Concrete Using TiO2 Nanoparticles as Additive

2019 ◽  
pp. 1898-1903
Author(s):  
Noor Ali Khudhair ◽  
Abdulkareem Mohammed Ali Al-Sammarraie
Keyword(s):  
Tio2 Nanoparticles ◽  
Corrosion Protection ◽  
Cyclic Polarization ◽  
Saline Environment ◽  
Tio2 Nps ◽  
Steel Rebar ◽  
Loop Area ◽  
Atomic Force ◽  
Quantum Confinement Effects ◽  
Concrete Solution

     Nanomaterials became targeted materials for many important applications due to its huge surface area and quantum confinement effects. In this work TiO2 nanoparticles (30nm) were used as additive to enhance the corrosion protection of steel rebar in artificial concrete solution (Ca(OH)2 (2g), KOH (22.44mg), NaOH (8mg) in 1L of distilled water) against saline environment (3.5%NaCl) at four temperatures; 20, 30, 40, and 50á´¼C. Three different concentrations of TiO2 NPs were used namely; 1, 3, and 5% by weight. The corrosion parameters and pitting probability were followed using Tafel and cyclic polarization plots respectively. Protection enhancement was recorded at all TiO2 percent used and efficiencies of 75-86% were achieved. Using TiO2 NPs reduces but not diminished the pitting hysterias loop area. The results supported by surface morphology examination using atomic force microscope (AFM).

scholarly journals Structure-modulated CaFe-LDHs with superior simultaneous removal of deleterious anions and corrosion protection of steel rebar

RSC Advances ◽  
2021 ◽  
Vol 11 (18) ◽  
pp. 10951-10961
Author(s):  
Ji Young Park ◽  
Jimin Lee ◽  
Minseob Lim ◽  
Gwang-Myeong Go ◽  
Hong-Baek Cho ◽  
...  
Keyword(s):  
Corrosion Protection ◽  
Concrete Structures ◽  
Simultaneous Removal ◽  
Steel Rebar ◽  
Anionic Species ◽  
Chemical Factors

The three anionic species; chloride (Cl−), sulfate (SO42−), and carbonate (CO32−), are typical chemical factors that environmentally accelerate failure of concrete structures with steel rebar through long-term exposure.

Sign in / Sign up

Export Citation Format

Share Document