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Abstract
Electrochemical behaviour of mild steel in aqueous acidic solution of
0.5M HCl and 3.5% NaCl solution in absence and presence of the three
different inhibitors .One of them is acrylamide monomer ,the other two
inhibitors are Polyacrtlamide and Poly 1- N- acryloyl – P
aminobenzenesulphonic acide.
The corrosion behaviour of mild steel in the absence and presence of
the inhibitors was investigated by weight .loss and potentiodynamic
using different concentration of inhibitors at different temperatures .
The thermodynamic activation parameters were calculated for both
technique and the data are comparable.
The experimental results obtained from both weight loss and
polarization measurments for mild steel electrode obeyed the Langmuir
adsorption isotherm.
The inhibition efficiencies of the three inhibitors in both 0.5M HCL ,
3.5% NaCl have the following order :
PNA>PAM>AM
The values of Ea and Ha in the inhibited solutions( 0.5M HCL and
3.5% NaCl ) obtained by the two techniques weight loss and
polarization methods are higher than the uninhibited solutions