Effect of Piperidin-4-ones on the Corrosion Inhibition of Mild Steel in 1 N H₂SO₄

Table 6

Impedence parameters for mild steel in 1 N H₂SO₄ in the absence and presence of optimum concentration (0.4 × 10⁻³ M) of variously substituted piperidin-4-ones.

Inhibitors	(Ω cm^2)	(μF cm^−2)	Inhibition efficiency (%)
Blank	6.548	59.44	Nil
(01)	19.55	22.88	66.51
(02)	13.60	30.39	51.85
(03)	10.60	37.20	38.23
(05)	09.62	42.45	31.93
(06)	11.26	35.89	41.85