Research Article

Study of Synergistic Effect of Iodide on the Corrosion Antagonistic Behaviour of a Heterocyclic Phenylhydrazone in Sulphuric Acid Medium on Carbon Steel

Table 2

Electrochemical impedance parameters of CS specimens in 0.5 M H2SO4 at 30°C in the absence and presence of 3APPH (a) and 3APPH + 0.2 mM KI (b).
(a)

(mM) ( cm2) ( F cm−2)

09.72133
0.219.5413450.25
0.422.7712157.31
0.624.0911959.65
0.841.3911876.51
1.048.2211679.84

(b)

(mM) ( cm2) ( F cm−2)

Blank + KI12.2112820.39
0.2 + KI518.428.998.13
0.4 + KI107126.299.09
0.6 + KI130120.299.25
0.8 + KI149921.599.35
1.0 + KI160714.399.39