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IJCT Vol.15(2) [March 2008] >

Title: Corrosion characteristics of mild steel in aqueous solution of formic acid containing some acetic acid
Authors: Singh, S K
Mukherjee, Ashim K
Singh, M M
Keywords: Mild steel
Acetic acid
Formic acid
Issue Date: Mar-2008
Publisher: CSIR
Abstract: Weight loss and potentiostatic techniques were used at 25, 35 and 45ºC to investigate the corrosion behaviour of mild steel in aqueous solution of formic acid containing different amounts of acetic acid, maintaining the total concentration of the acids at 20%. It was found that the corrosion rate of mild steel in the mixture of the two acids is a function of acid composition and temperature. The maximum corrosion rate was observed in 20:0 % (formic:acetic) acid solutions by both techniques. The corrosion rate of mild steel in the aqueous mixture of formic and acetic acid having different compositions (%) followed the order 20:0> 19:1>18:2> 15:5> 10:10. Active corrosion behaviour of mild steel was observed over the whole range of potentials at each composition and temperature. The cathodic polarisation curves were almost identical irrespective of the composition of the two acids in the mixture.
Page(s): 174-179
ISSN: 0971–457X
Source:IJCT Vol.15(2) [March 2008]

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