Volume 14 Issue 2 November - January
2019
Research Paper
Narasimha Raghavendra*
* Assistant Professor, Department of
Chemistry, K.L.E. Society's P. C. Jabin Science College (Autonomous), Hubballi,
Karnataka, India.
Raghavendra, N. (2019). Corrosion
Inhibiting Effect of 1, 1-Biss-2-Naphthol Containing Two Hydroxyl Groups for Al
in the Harsh Hydrochloric Acid Environment. i-manager’s Journal on
Future Engineering and Technology , 14 (2), 37-41.https://doi.org/10.26634/jfet.14.2.15399
Abstract
The main objective
of this research was to examine the corrosive inhibition property of
1,1-biss-2-Naphthol on the aluminum surface in 3 M HCl environment by weight
loss, gasometric, Tafel plot, and impedance spectroscopy techniques. Weight
loss results show that addition of1,1-biss-2-Naphthol to the examined solution
significantly increases the protection efficiency (decreases dissolution rate).
Gasometric studies show that addition of 1, 1-biss-2-Naphthol to the aggressive
acid solution effects on the rate of evolution of hydrogen gas. The Tafel plot
results show that the synthesized compound 1, 1-biss-2-Naphthol behave as mixed
type and hinders cathodic aluminum and anodic aluminum reactions. Impedance
studies show that enhancement in the depressed semi circle is due to the
positive effect of synthesized compound 1, 1-biss-2-Naphthol.
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