TY - JOUR
T1 - Corrosion inhibition and adsorption mechanism studies of Hunteria umbellata seed husk extracts on mild steel immersed in acidic solutions
AU - Alaneme, Kenneth Kanayo
AU - Olusegun, Sunday Joseph
AU - Adelowo, Oluwabunkunmi Tomi
N1 - Publisher Copyright:
© 2015 Faculty of Engineering, Alexandria University.
PY - 2016/3/1
Y1 - 2016/3/1
N2 - The corrosion inhibition characteristics of Hunteria umbellata seed husk extracts on mild steel immersed in 1 M HCl and H2SO4 solutions were investigated. Mass loss, atomic absorption spectroscopy (AAS), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) were used as basis for studying the corrosion inhibition behavior of the extracts. The results show that the extracts contain O-H, C-N and unsaturated C=C functional groups which were identified as contributing to the inhibition exhibited by the extracts. The inhibition efficiency was found to increase with increase in extract concentration in the acidic solutions but decreases with increase in temperature. Specifically, the inhibition efficiency of the extracts was observed to be generally very high but more effective in 1 M HCl compared to 1 M H2SO4 solution. Langmuir isotherm best fits the data obtained suggesting physical adsorption as the adsorption mechanism between the extract and the mild steel substrate.
AB - The corrosion inhibition characteristics of Hunteria umbellata seed husk extracts on mild steel immersed in 1 M HCl and H2SO4 solutions were investigated. Mass loss, atomic absorption spectroscopy (AAS), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) were used as basis for studying the corrosion inhibition behavior of the extracts. The results show that the extracts contain O-H, C-N and unsaturated C=C functional groups which were identified as contributing to the inhibition exhibited by the extracts. The inhibition efficiency was found to increase with increase in extract concentration in the acidic solutions but decreases with increase in temperature. Specifically, the inhibition efficiency of the extracts was observed to be generally very high but more effective in 1 M HCl compared to 1 M H2SO4 solution. Langmuir isotherm best fits the data obtained suggesting physical adsorption as the adsorption mechanism between the extract and the mild steel substrate.
KW - Acidic solutions
KW - Adsorption mechanism
KW - Green inhibitors
KW - Hunteria umbellata
KW - Mild steel
KW - Phytochemical constituents
UR - http://www.scopus.com/inward/record.url?scp=84961943433&partnerID=8YFLogxK
U2 - 10.1016/j.aej.2015.10.009
DO - 10.1016/j.aej.2015.10.009
M3 - Article
AN - SCOPUS:84961943433
SN - 1110-0168
VL - 55
SP - 673
EP - 681
JO - AEJ - Alexandria Engineering Journal
JF - AEJ - Alexandria Engineering Journal
IS - 1
ER -