Synthesis, Cyclic Voltammetric, Electrochemical, and Gravimetric Corrosion Inhibition Investigations of Schiff Base Derived from 5,5-Dimethyl-1,3-cyclohexanedione and 2-Aminophenol on Mild Steel in 1 M HCl and 0.5 M H₂SO₄

Table 3

Thermodynamic parameters of corrosion of MS with and without DmChDp in 1M HCl and 0.5M H₂SO₄.

Acid medium	Conc; (mM)	(KJ mol^−1)	A	(KJ mol^−1)	(J mol^−1K^−1)
HCl	Blank	55.7	3.81×10^10	53.03	-44.26
	0.2	103.04	1.40×10^18	100.40	100.59
	0.4	105.58	3.38×10^18	102.94	107.92
	0.6	123.53	2.43×10^21	120.89	162.60
	0.8	127.55	1.01×10^22	124.91	174.49
	1	134.58	1.16×10^23	131.9	194.77
H2SO4	Blank	33.1	2.08×10^7	30.5	-106.71
	0.2	50.24	9.96×10^9	47.60	-55.97
	0.4	79.40	14.57×10^14	76.76	32.16
	0.6	79.43	14.55×10^14	76.79	31.81
	0.8	99.57	17.61×10^17	96.93	90.36
	1	100.93	17.85×10^17	98.29	95.07