The Inhibition Effect of Potassium Iodide on the Corrosion of Pure Iron in Sulphuric Acid

Table 3

The values of activation parameters for pure iron in 0.5 M H₂SO₄ in the absence and the presence of inhibitor of 2·10⁻³ M concentration at 2 h.

Concentration of inhibitor (M)	(kJ/mol)	(kJ/mol)	(kJ/mol)
0.5 H2SO4	84.32	81.65	2.67
KI	78.89	76.22	2.67