Synthesis and Kinetics of Corrosion Inhibition of Water-Soluble Terpolymer of Polyvinyl Alcohol Functionalized with Vinyl Sulfonate and p-Vinyl Benzene Sulfonate, in Molar HCl
“…Geethanjali1 and Subhashini [94] synthesised and characterised a polyvinyl alcohol-g-polyvinyl sulphonate-p-vinyl benzene sulphonate (PVA-VSA-PVBS), which is a water-soluble terpolymer and manifested its protection power for MS in 1 M HCl. The characterisation of terpolymer was achieved using thermal (TGA and DSC) and spectral (FTIR and NMR) methods.…”
Section: Polyvinyl Alcohol (Pva) In Corrosion Prevention: Literature ...mentioning
confidence: 99%
“…The decrease in the average surface roughness in the presence of PVA-VSA-PVBS is attributed to the formation of protective film by it. Figure 9 (Upper) SEM image and EDX spectrum of MS surface corroded in the presence of PVA-VSA-PVBS and (lower) AFM images of (a) polished, (b) corroded in the absence of PVA-VSA-PVBS and (c) corroded in the presence of PVA-VSA-PVBS [94]. …”
Section: Polyvinyl Alcohol (Pva) In Corrosion Prevention: Literature ...mentioning
confidence: 99%
“…(Upper) SEM image and EDX spectrum of MS surface corroded in the presence of PVA-VSA-PVBS and (lower) AFM images of (a) polished, (b) corroded in the absence of PVA-VSA-PVBS and (c) corroded in the presence of PVA-VSA-PVBS [94]. …”
Section: Polyvinyl Alcohol (Pva) In Corrosion Prevention: Literature ...mentioning
Polyvinyl Alcohol (PVA) is a water-soluble biodegradable polymer with many industrial and biological applications. Because of its polymeric nature, reasonably high aqueous phase solubility and biodegradable properties, the use of PVA and its suitably modified derivatives as aqueous and coating phase corrosion inhibitors have acquired great recent attention. PVA and its derivatives are associated with a proper combination of hydrophilicity and hydrophobicity, essential for effective anticorrosive activity. The present review aims to describe the past and present advancements in using PVA and its derivatives as aqueous and coating phase corrosion inhibitors. Bonding of PVA with the metallic surface in anodic, basic and neutral electrolytes has also been proposed along with their orientation. They become effective by adsorbing on the metal surface. They act as mixed-type inhibitors and create a barrier to the charge transfer process. Various experimental and computational techniques are used to describe their corrosion inhibition property.
“…Geethanjali1 and Subhashini [94] synthesised and characterised a polyvinyl alcohol-g-polyvinyl sulphonate-p-vinyl benzene sulphonate (PVA-VSA-PVBS), which is a water-soluble terpolymer and manifested its protection power for MS in 1 M HCl. The characterisation of terpolymer was achieved using thermal (TGA and DSC) and spectral (FTIR and NMR) methods.…”
Section: Polyvinyl Alcohol (Pva) In Corrosion Prevention: Literature ...mentioning
confidence: 99%
“…The decrease in the average surface roughness in the presence of PVA-VSA-PVBS is attributed to the formation of protective film by it. Figure 9 (Upper) SEM image and EDX spectrum of MS surface corroded in the presence of PVA-VSA-PVBS and (lower) AFM images of (a) polished, (b) corroded in the absence of PVA-VSA-PVBS and (c) corroded in the presence of PVA-VSA-PVBS [94]. …”
Section: Polyvinyl Alcohol (Pva) In Corrosion Prevention: Literature ...mentioning
confidence: 99%
“…(Upper) SEM image and EDX spectrum of MS surface corroded in the presence of PVA-VSA-PVBS and (lower) AFM images of (a) polished, (b) corroded in the absence of PVA-VSA-PVBS and (c) corroded in the presence of PVA-VSA-PVBS [94]. …”
Section: Polyvinyl Alcohol (Pva) In Corrosion Prevention: Literature ...mentioning
Polyvinyl Alcohol (PVA) is a water-soluble biodegradable polymer with many industrial and biological applications. Because of its polymeric nature, reasonably high aqueous phase solubility and biodegradable properties, the use of PVA and its suitably modified derivatives as aqueous and coating phase corrosion inhibitors have acquired great recent attention. PVA and its derivatives are associated with a proper combination of hydrophilicity and hydrophobicity, essential for effective anticorrosive activity. The present review aims to describe the past and present advancements in using PVA and its derivatives as aqueous and coating phase corrosion inhibitors. Bonding of PVA with the metallic surface in anodic, basic and neutral electrolytes has also been proposed along with their orientation. They become effective by adsorbing on the metal surface. They act as mixed-type inhibitors and create a barrier to the charge transfer process. Various experimental and computational techniques are used to describe their corrosion inhibition property.
“…Drenching time is a crucial factor to be considered in identifying the soundness of the inhibitor film and the rate of inhibitor adsorption. Weight reduction estimations were additionally used to contemplate the impact of temperature on the corrosion of mild steel with the nearness of consumption inhibitor (27)(28)(29).…”
As corrosion inhibitors for mild steel in acidic media, polymers are emerging materials due to its larger surface coverage area. This paper focuses on the characteristic of water-soluble solvent polyvinyl alcohol (PVA) at interface of mild steel under 0.5 M HCl, examined using electrochemical impedance spectroscopy, Tafel polarization, and weight reduction techniques. The findings of the study revealed that water-soluble polyvinyl alcohol as polymer inhibitor has restraint abilities, up to 93.7 percent for 3 hours in 0.5 M hydrochloric acid. An advanced form of high spatial resolution imaging of surface of mild steel at different stages was found by using scanning electron microscopy which shows that the sample immersed for 3 hrs in 0.5 M HCl with 100 ppm of water soulble PVA inhibitor provides good inhibition quality to corrosion on mild steel surface.
“…Chaouiki et al [12] studied the synthetic organic compounds, i.e., 4-(isopentylamino)-3-nitrobenzonitrile and 3-amino-4-(isopentylamino)benzonitrile for corrosion inhibition of mild steel in a 1.0 M HCl solution and reported that 4-(isopentylamino)-3-nitrobenzonitrile resulted in improvements to inhibition efficiency. Other synthetic organics, such as 1-hydroxyethyl-3-methylimidazolium hexafluorophosphate and 1-hydroxyethyl-3-methylimidazolium bis-(trifluoromethylsulfonyl)imide [13], clopidogrel [14], p-vinyl benzene sulfonate and vinyl sulfonate-functionalized polyvinyl alcohol [15], 4-mercaptopyridine-modified sodium dodecyl sulfate [16], 1H-perimidine and 1H-perimidin-2-amine [17], tetrazole derivatives [18], 4-((2,3dichlorobenzylidene)amino)-3-methyl-1H-1,2,4-triazole-5(4H)-thione [19], 5-aminopyrazole carbonitriles [20], 2-(1-piperidyl)ethyl 3-methyl-4-oxo-2-phenylchromene-8-carboxylate [21], and 1-(2-ami-noethyl)-1-dodecyl-2-(trifluoromethyl)-4,5-dihydro-1H-imidazol-1-ium chloride [22] have been investigated as corrosion inhibitors for the protection of mild steel in HCl, H 2 SO 4 , and phosphoric acid solution at room temperature. e results confirmed that the compounds reported an inhibition efficiency in the range of 57.1-81.4% [15], 97.0-98.6% [16], 34.6-92.3% [17], 71.1-94.2% [19], 56.8-95.5% [20], 91.2-97.9% [21], and 80.6-99.2% [22].…”
This article details an investigation on the mechanism of corrosion inhibition of mild steel using amylose-acetate-blended carboxymethyl chitosan (AA-CMCh) in acidic media in the context of kinetic and thermodynamic parameters. The surface of mild steel was exposed to test solutions and evaluated using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The activation energy (Ea), free energy of adsorption (ΔG), enthalpy of activation (ΔHads), and entropy of activation (ΔSads) were determined in order to elucidate the mechanism of corrosion inhibition. The results confirmed that AA could be improved using CMCh as a corrosion inhibitor. The corrosion rate decreased from 1109.00 to 229.70 mdd (79.29%), while corrosion inhibition increased from 35.13 to 89.72%. Sulfate acid (H2SO4) of 0.25 M also helped in decreasing the corrosion rate from 2664.4 to 1041.67 mdd (60.9%) while also in increasing corrosion inhibition from 56.94 to 68.31%. The calculated values for ΔG, ΔHads, and ΔSads were −33.22 kJ·mol−1, −48.56 kJ·mol−1, and 0.0495 kJ·mol−1·K−1, respectively. The mechanism of corrosion inhibition of mild steel in the acidic condition is dominated and precipitated by the formation of the Fe-chelate compound, which was confirmed by the SEM/EDS spectrum. The reactions were spontaneous, exothermic, and irregular and takes place on the surface of mild steel.
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