Electrochemical and Surface Morphological Studies of Carbon Steel Corrosion by a Novel Polynuclear Schiff Base in HCl Solution

Table 1

The corrosion rate, percentage of inhibition efficiency, and surface coverage for CS specimens immersed in 1 M HCl at 30°C for 24 h in the presence and absence of A9Y5GPA.

𝐶 (mM)	Corrosion; rate (mmy^−1)	Inhibition; efficiency (𝜂𝑊%)	𝜃
0	6.503	—	—
0.2	3.440	47.09	0.47
0.4	2.906	55.31	0.55
0.6	2.382	63.37	0.63
0.8	1.969	69.72	0.70
1.0	1.723	73.50	0.74