Table 11. Comparison of corrosion inhibitor performance with other polymers.

Compound	Inhibition efficiency	Concentration and medium	Ref
(p-Semidine-guanidine-formaldehyde) terpolymer	93.7% mild steel	10−3 M in H2SO4	19
Acrylic acid (AA), oxalic acid-allypolyethoxy carboxylate (APEM)-phosphorous acid (H3PO3) terpolymer	79.77% carbon steel	30 mg L−1 in 1 M HCl	39
Chitosan-acrylic acid-polysuccinimide terpolymer	71.17% carbon steel	500 mg L−1 in 3.5% NaCl	40
Acrylamide/styrene/maleic anhydride terpolymers (ASM) and thermally aged acrylamide/styrene/maleic anhydride terpolymers (A/ASM)	ASM (52%), A/ASM (94%)Mild steel	3000 ppm in 3.5% NaCl	41
4,4-Diaminodiphenylmethane-melamine-formaldehyde terpolymer (DMF)	94% mild steel	100 ppm in 1 M HCl	Present work