Interaction of Two Water Soluble Heterocyclic Hydrazones on Copper in Nitric Acid: Electrochemical, Surface Morphological, and Quantum Chemical Investigations

Table 1

Impedance parameters of copper in the presence and absence of heterocyclic hydrazones in 0.1 M HNO₃.

	Blank	0.2 mM	0.4 mM	0.6 mM	0.8 mM	1.0 mM
3APTSC
	1166	415	132	110	113	101
	440	788	1643	1798	1906	2066
%	—	44.16	73.22	75.53	76.91	78.70
3APPH
	1166	146	82	78	63	52
	440	2661	3122	3245	3314	4961
%	—	83.46	85.90	86.44	86.72	91.13

in μF cm⁻²; in Ω cm².