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

Table 1

Effectiveness of various carbohydrate-based natural polymers as CIs of different metals and alloys.

Inhibitor	Concentration	Material	Test conditions	Maximum efficiency	Test technique	References
Inulin	1.0 g/L	6061 Al alloy	0.025 M HCl, 30°C	69.0%	Tafel	[121]
Inulin	1.0 g/L	6061 Al-15%(v) SiC(p)	0.025 M HCl, 30°C	93.9%	Tafel	[121]
HEC	2000 mg/L	MSteel	0.5 M H2SO4, 30°C	93.9%	WL	[122]
HEC	2000 mg/L	AA 1060 (98%)	0.5 M H2SO4, 30°C	65.5%	WL	[122]
Hydroxypropyl methylcellulose (HPMC)	2000 mg/L	AA 1060 (99%)	0.5 M H2SO4, 30°C	60.4%	WL	[123]
Ficus benjamina gum	0.5 g/L	Al (96.65%)	0.1 M H2SO4, 60°C	87.5%	WL	[124]
Exudate gum	0.5 g/L	AA 1060 (98.5%)	2 M HCl, 30°C	42.0%	WL	[125]
Raphia hookeri	0.5 g/L	AA 1060 (98.5%)	2 M HCl, 30°C	56.3%	WL	[126]
Raphia hookeri-halide mixture	Exudate (0.5 g/L)+KI	Al sheet	0.1 M HCl, 30°C	70.5%	WL	[125]
Iota-carrageenan-pefloxacin mixture	i-carrageenan (1600 ppm)+pefloxacin (400 ppm)	Al sheet (99.7%)	2 M HCl, 10°C	74.2%	WL	[127]
Pectin	8.0 g/L	Al sheet (99.7%)	2 M HCl, 10°C	90.0%	WL	[128]
Polymeric pectate	0.06 M	Al (99.9%)	3 M HCl, 40°C	70.1%	WL	[129]
Starch	0.8 g/L	6061 Al-15%(V) SiC(P)	0.25 M HCl, 50°C	83.4%	Tafel	[130]
CS	0.028 g/L	Pure Al	0.1 M HCl, 30°C	90.6%	EIS	[131]
Dextran	0.4 g/L	6061 Al-15%(V) SiC(P)	1 M HCl, 30°C	91.3%	Tafel	[132]
Dextran	0.4 g/L	Epoxy coated 6061 Al-15%(V) SiC(P)	1 M HCl, 30°C	92.7%	Tafel	[132]
Dextran	0.4 g/L	6061 Al alloy	1 M HCl, 30°C	77.9%	EIS	[133]
Dextran	0.4 g/L	6061 Al-15%(V) SiC(P)	0.25 M HCl, 50°C	79.5%	Tafel	[134]
Glucomannan+bisquaternary ammonium salt	80 mg/L	MSteel	0.5 M NaCl, 50°C,	99.1%	Tafel	[135]
GA of Iraqi apricot tree	0.3 g/L	MSteel	1 M HCl, 40°C	73.6%	WL	[136]
Tender arecanut seed extract	4.5 g/L	Al-63400	0.5 M HCl, 30°C	96.2%	EIS	[137]
Agarose	700 ppm	Al (98.5%)	1 M HCl	81.3%	EIS	[138]
Agarose	700 ppm	Al (98.5%)	0.5 M H2SO4	64.7%	EIS	[138]
Agarose	700 ppm	Al (98.5%)	0.5 M H3PO4	61.8%	EIS	[138]
HPMC phthalate	580 μm thick coating	High-speed steel	0.5 M NaCl, RT	96.9%	Tafel	[139]
HPMC acetate succinate	360 μm thick coating	High-speed steel	0.5 M NaCl, RT	94.7%	Tafel	[139]
Extract of Thevetia peruviana	300 ppm	CSteel	1 M HCl, 25°C	90.3%	EIS	[140]
GG	0.5 g/L	MSteel	15% HCl, 25 °C	86.5%	WL	[141]
Cationic GG	0.5 g/L	MSteel	15% HCl, 25 °C	96.4%	WL	[141]