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Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.17 [2010] >
IJCT Vol.17(2) [March 2010] >
| Title: | Corrosion inhibition of Al-Mg alloy by gentisic acid |
| Authors: | Vrsalović, L
Kliškić, M
Gudić, S
Smoljko, I |
| Keywords: | Al-Mg alloy
Corrosion inhibition
Gentisic acid
Rotating disc electrode
Adsorption
Activation energy |
| Issue Date: | Mar-2010 |
| Publisher: | CSIR |
| Abstract: | Gentisic acid
was studied for possible use as an Al-2.5Mg alloy corrosion inhibitor in a 0.5
mol dm-3 NaCl solution. Investigations were performed on a rotating
disc electrode in a quiescent solution at different electrode rotation rates
and electrolyte temperatures. The results indicate that, the addition of
gentisic acid inhibits corrosion of Al-2.5Mg alloy, and the inhibition
efficiency increases with increasing inhibitor concentration but decreases with
increasing electrode rotation rate and electrolyte temperature. The
investigated compound acts as a cathodic-type inhibitor and the inhibition is
ascribed to the adsorption of the inhibitor onto the electrode surface. The
adsorptive behaviour of gentisic acid follows the Freundlich adsorption
isotherm. |
| Page(s): | 89-94 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.17(2) [March 2010]
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