| Article Details : |
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| | | Article Name : | | | Corrosion Resistance of Reinforced Steel in
Concrete with Invingia Gabonensis Exudates /
Resins Coated Steel
| | Author Name : | | | NELSON TOMBRA AKARI, CHARLES KENNEDY, CHARLES ESTHER NWOCHIGZIRI | | Publisher : | | | Bridge Center | | Article URL : |  | | | Abstract : | | | Greener approach inhibitors of environmentally friendly, toxic
free and inexpensive has greater demand to organic ones due to their
biodegradable properties. This experimental work evaluated the use of
environmentally inorganic exudates / resins extracted from trees bark
of invingia gabonensis, layered to reinforcing steel with varying
thicknesses, immersed in sodium chloride (NaCl) for corrosion
examinations in comparison with non-coated and control samples for
150 days accelerated process with applied currents potential of -200
mV through 1200mV, with a scan rate of 1mV/s. Results of corroded
and exudates/resin coated specimens concrete resistivity ?, k?cm
against potential Ecorr,
mV relationship showed average potential Ecorr
control percentile average value of 32.27042% and percentile difference
-67.7296% over 259.7082% corroded specimen. Concrete resistivity ?,
k?cm averaged results percentile average value of 182.7709% and
percentile difference 82.7709% over -36.4744% corroded specimen.
Mechanical properties ultimate strength of control specimen
percentile average value 91.55303% and percentile difference -
8.44697% over 9.104398% corroded specimen. Mechanical properties
weight loss of steel of control with percentile average value 50.9558% and percentile difference -49.0442% over 97.67224% corroded.
Mechanical properties cross- section area reduction of control
percentile average value 113.1957% and percentile difference
13.19568% over -11.6574% corroded specimen. Entire results of
exudates / resin coated specimens showed indications of no corrosion
potential, results proved invingia gabonensis exudates / resins as good
corrosion inhibitor. Cross- section area reduction results showed
higher percentile reduction values due to adverse in fibre loss on the
mechanical properties of steel resulting from corrosion potentials.
Results of weight loss of steel showed higher percentile values against
control and coated specimens due to the effect of corrosion on the
mechanical properties of steel. Results showed little loads to high
ultimate yielding of corroded specimens to control and coated
specimens resulting from reduction of mechanical properties of the
steel reinforcement. | | Keywords : | | | Corrosion, Corrosion Inhibitors, Corrosion Potential,
Concrete Resistivity and Steel Reinforcement.
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