Polymers Decorated with Functional Motifs for Mitigation of Steel Corrosion: An Overview

Table 3

PANI-based CIs for various metals and alloys.

Inhibitor	Concentration	Material	Test conditions	Maximum efficiency	Test technique	References
HCl-doped poly(o-ethoxy aniline)	200 ppm	Pure Fe	1 M HCl, RT	92%	LPR	[150]
Sulfamic acid-doped poly(o-ethoxy aniline)	75 ppm	Pure Fe	1 M HCl, RT	93%	WL	[150]
HCl-doped poly(o-methoxy aniline)	200 ppm	Pure Fe	1 M HCl, RT	91%	LPR	[151]
Sulfamic acid-doped poly(o-methoxy aniline)	75 ppm	Pure Fe	1 M HCl, RT	92%	LPR	[151]
Poly(styrene sulfonic acid)-doped PANI	70 ppm	MSteel	1 M HCl, 30°C	85%	Tafel	[152]
Low-MW poly(o-ethoxyaniline)	100 ppm	CSteel	1 M HCl, 60°C	96%	Tafel	[153]
Self-doped polyanthranilic acid	60 ppm	MSteel	0.5 M HCl, 60°C	94%	EIS	[154]
PANI and PDDMAC blend	150 ppm	Pure Fe	1 M HCl, RT	59%	Tafel	[155]
Poly(aniline-co-2-isopropylanilne)	80 ppm	Pure Fe	1 M HCl, RT	72%	Tafel	[156]
LiSIPA-doped poly(aniline-co-2-isopropylaniline)	80 ppm	Pure Fe	1 M HCl, RT	72%	Tafel	[157]
Poly(aniline-formaldehyde)	10 ppm	MSteel	1 M HCl, 35 °C	98%	WL	[158]
Poly(vinyl alcohol-o-methoxy aniline) composite	2000 ppm	MSteel	1 M HCl, RT	91%	EIS	[159]
Poly(p-chloroaniline-formaldehyde)	15 ppm	MSteel	1 M HCl, 35 °C	98%	WL	[160]
Sulfonated chitosan-doped PANI	40 ppm	MSteel	0.5 M HCl, RT	92%	EIS	[161]
PANI-polyacrylic acid (PAA) composite	200 ppm	316 SSteel	0.5 M HCl, RT	92%	EIS	[162]
PANI-palm oil blend		MSteel	3% NaCl, RT	90%	EIS	[163]
p-Toluene sulfonic acid-doped PANI		Copper	0.1 M HCl, RT	89%	EIS	[164]
PANI/modified SiO2 composite coating	50 μm thick coating	Q235 CSteel	0.1 M H2SO4, RT	99%	Tafel	[165]
PANI-graphene nanocomposite film	6.9 μm thick coating	310 SSteel	Aerated 5000 ppm NaCl, RT	97%	EIS	[166]
PANI/poly(methyl methacrylate) (PMMA) coating	40-48 μm thick coating	Q235 CSteel	0.1 M H2SO4, RT	99%	Tafel	[167]
Poly(aniline-co-phenetidine)/SiO2	65-75 μm thick coating	MSteel	3.5% NaCl, 25°C	99%	Tafel	[168]
Poly(aniline-co-2-pyridylamine-co-2,3-xylidine)/ZnO nanocomposite	11.05–13.30 μm thick coating	MSteel	0.1 M HCl, 30 °C	99%	Tafel	[169]
Poly(aniline-co-N-methyl aniline)	—	CSteel	0.1 M HCl	81%	Tafel	[170]