International Journal of Corrosion / 2013 / Article / Tab 2

Research Article

Inhibition Behaviour of Some Isonicotinic Acid Hydrazides on the Corrosion of Mild Steel in Hydrochloric Acid Solution

Table 2

Activation parameters for MS in 0.5 M HCl medium in the absence and presence of INIMH and INPMH at 500 ppm.

InhibitorConcentration (ppm) (kJ mol−1) (mg cm−2 h−1) (kJ mol−1) (kJ mol−1) (J mol−1 K−1)

Blank019.0031374.04116.36516.484−197.574

INIMH20023.4552570.39620.81320.936−188.498
30024.3553076.09621.71321.836−187.005
40026.7485357.96624.10624.229−182.391
50027.4575610.47924.81524.937−182.027

INPMH20023.2822483.13320.65920.763−188.785
30024.0872890.67921.46421.568−187.522
40026.5195128.61323.87623.999−182.754
50027.0935211.94724.47024.574−182.620

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