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.com
Volume 08
Innovative Energy & Research
ISSN: 2576-1463
Advanced Energy Materials 2019
July 11-12, 2019
July 11-12, 2019 | Zurich, Switzerland
21
st
International Conference on
Advanced Energy Materials and Research
Natural plants: An efficient inhibitors of mild steel corrosion in H
2
SO
4
acid
Aisha H Al-Moubaraki
University of Jeddah, Saudi Arabia
The effect of aqueous extract of three natural plants called:
Tribulus Terrestris
(TTAE) (Inh. 1),
Vachellia Nilotica
(VNAE) (Inh. 2) and
Cymbopogeon Schoenanthus
(CSAE) (Inh. 3) as inhibitors of mild steel corrosion in 1.0N
H
2
SO
4
acid solution at 30°C was investigated using weight loss (WL), electrochemical impedance spectroscopy (EIS)
and potentiodynamic polarization (PDP). The results showed that the three inhibitors worked well to inhibit the
corrosion of mild steel in 1.0N H
2
SO
4
acid, depending on the following order: TTAE> VNAE>CSAE. The addition
of increasing amount of the studied inhibitors inhibit the corrosion rate of mild steel and maximum inhibition
efficiency of 91.37%, 88.51%, and 87.14% respectively was obtained at 2.0 g/L
-1
. Different adsorption isothermmodels
were tested and Langmuir adsorption isotherm showed best fit with the parameters. The inhibition mechanism was
discussed based on adsorption on mild steel surface from 1.0N H
2
SO
4
acid solution. The analysis of FTIR spectra
established the formation of a strong bond between inhibitors species and mild steel surface.
Recent Publications
1. Aisha H Al-Moubaraki, Aisha A Al-Howiti, Mervat M Al-Dailami and Enas A Al-Ghamdi (2017) Role of
aqueous extract of celery (Apium graveolens L.) seeds against the corrosion of aluminium/sodium hydroxide
systems. Journal of Environmental Chemical Engineering 5:4194-4205.
2. Aisha H Al-Moubaraki and Hind H Al-Rushud (2017) Anticorrosive effects of leek seeds aqueous extract
(AlliumampeloprasumVar. Kurrat) on aluminumalloys 6061, 7075 and 2024 in Seawater. Organic andMedicinal
Chemistry International Journal 3(5):1-10.
3. Aisha H Al-Moubaraki (2018) Potential of borage flowers aqueous extract, Borago officinalis L., against the
corrosion of mild steel in phosphoric acid. Anti-Corrosion Methods and Materials 65:53-65.
4. Aisha H Al-Moubaraki and Hind H Al-Rushud (2018) The red sea as a corrosive environment: corrosion rates
and corrosion mechanism of aluminum alloys 7075, 2024, and 6061. International Journal of Corrosion 1-15.
Aisha H Al-Moubaraki, Innov Ener Res 2019, Volume 08
Figure 2: Laboratory procedures for the
preparation of the studied inhibitors
Figure 1: Macroscopic images for mild steel specimen in
the absence and presence of the studied inhibitors.