Inhibition of mild steel corrosion in HCl solution using chitosan

Umoren, Savıour A.; Banera, Mauro Jonathan; Alonso-García, Teodoro; Gervasi, C.A.; Mirífico, María Virginia

doi:10.1007/s10570-013-0021-5

Cited by 171 publications

(63 citation statements)

References 59 publications

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“…The inhibitive influence of chitosan as a green corrosion inhibitor for mild steel in 0.1 M HCl was studied [26] using gravimetric, potentiodynamic polarization, electrochemical impedance spectroscopy, scanning electron microscopy, and UV-visible techniques. The polymer was found to moderately inhibit the corrosion of mild steel in the studied environment even at low concentration and had influence on both the anodic and cathodic reactions.…”

Section: Naturally Occurring Polymers As Metal Corrosion Inhibitorsmentioning

confidence: 99%

“…Hence, physical adsorption mechanism is mostly proposed for most of the studied polymers studied [16,22,25,31,35]. However, in cases where chemical adsorption mechanism prevails, Umoren et al [26] explain that the inhibitor molecules exist as protonated species in equilibrium with the corresponding neutral species. The cationic and neutral molecules then become adsorb on the positively charged metal surface by displacing water molecules from the metal surface and the sharing of electron between free electrons of the heteroatoms and vacant orbitals of the metal take place.…”

Section: Mechanism Of Inhibition By Polymersmentioning

confidence: 99%

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Recent Developments on the Use of Polymers as Corrosion Inhibitors - A Review

Umoren

Solomon²

2014

TOMSJ

114

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Abstract:The use of corrosion inhibitors is the one the most economical and practical means of controlling metallic corrosion in different corrosive media. Interest on the use of eco-friendly organic compounds as corrosion inhibitors has extended to the use of polymers to inhibit metallic corrosion. The use of polymers as corrosion inhibitors has attracted attention and has gained wide acceptance in recent times. This has been attributed to a number of factors namely: (i) they are low cost and stable to metallic materials in acid media, (ii) they possess multiple adsorption sites, (iii) through their functional groups, they form complexes with metal ions and on the metal surface these complexes occupy a large area, thereby blanketing the surface and protecting the metal from corrosive agents present in the solution. A number of synthetic and natural polymers as metallic corrosion inhibitors have been investigated and reported. As an update to previous review work on the use of polymers as corrosion inhibitors, the present review presents most of the contributions made to the literature on the use of polymers as corrosion inhibitors of diverse metals in different corrosive media in the last four (2010)(2011)(2012)(2013) years.

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Section: Naturally Occurring Polymers As Metal Corrosion Inhibitorsmentioning

confidence: 99%

Section: Mechanism Of Inhibition By Polymersmentioning

confidence: 99%

Recent Developments on the Use of Polymers as Corrosion Inhibitors - A Review

Umoren

Solomon²

2014

TOMSJ

114

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“…Negative values of DG°are widely accepted as ensuring a spontaneous adsorption process and formation of a stable adsorbed layer on the steel surface [17][18][19]. In fact, DG rather than DG°has to be considered as the criterion of spontaneous change under non-standard conditions (at constant temperature and pressure) [20]. However, the easy availability of DG°values explains why they are usually used to get a rough idea of the direction of spontaneous change.…”

Section: Inhibitor Adsorptionmentioning

confidence: 99%

Corrosion inhibition of mild steel in sulphuric acid using a bicyclic thiadiazolidine

et al. 2014

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The inhibitory effect of 3a,6a-diphenyltetrahydro-1H-imidazo [4,5-c] [1, 2, 5] thiadiazole-5(3H)-thione 2,2-dioxide (TTU) on the corrosion behaviour of mild steel in 0.5 M H 2 SO 4 , at (30 ± 0.5)°C was studied by gravimetric, potentiodynamic polarization, electrochemical impedance spectroscopy, and scanning electron microscopy measurements. The effect of inhibitor concentration on the corrosion rate, surface coverage and inhibition efficiency is investigated. Results show that TTU exerts a strong inhibiting effect on mild steel corrosion and acts as a cathodic-type inhibitor. TTU does not affect the mechanism of the cathodic reaction while the anodic reaction mechanism changes upon addition of the inhibitor. Possible mechanistic pathways for the inhibition process are proposed. The inhibition efficiency of TTU may be due to either the adsorption of inhibitor molecules building a protective film or the formation of an insoluble complex of the inhibitor with metal cations. TTU adsorption obeys the Langmuir model.

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“…Chitosan has many applications in the field of drug delivery, food packaging, separators, cosmetics, water treatment, catalyst, agricultural material, etc. In addition to this, chitosan is also studied as an efficient corrosion inhibitor for steel/aluminum substrates …”

Section: Introductionmentioning

confidence: 99%

Conducting polymer/bio‐material composite coatings for corrosion protection

Sambyal¹,

Ruhi

Mishra

et al. 2017

Materials & Corrosion

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Present study demonstrates a facile in situ oxidative copolymerization method to synthesize conducting copolymer composites in aqueous chitosan medium. The development of poly(aniline‐co‐o‐toluidine)–chitosan–SiO2/epoxy composite coatings were carried out by thermal curing of the spray‐coated mild steel substrates. FT‐IR analysis, XRD studies, SEM and HR‐TEM evidenced that the composite has synergistically integrated properties of the copolymer and the SiO2 nanoparticles. The electrochemical analyses of the coatings in 3.5% NaCl solution manifest an efficient role of copolymer composite in the remarkable improvement of the corrosion resistance of the substrate. The analyses involve Tafel polarization and electrochemical impedance spectroscopy (EIS) studies. The corrosion inhibition property of conducting copolymers, the film forming ability of chitosan, and robustness of SiO2 nanoparticles kept the corrosion rate of the coatings significantly low, under highly corrosive conditions. Mild steel coated with 3.0% loading of copolymer composite coating demonstrated very low corrosion current density (icorr) and significantly high pore resistance (Rpore).

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Inhibition of mild steel corrosion in HCl solution using chitosan

Cited by 171 publications

References 59 publications

Recent Developments on the Use of Polymers as Corrosion Inhibitors - A Review

Recent Developments on the Use of Polymers as Corrosion Inhibitors - A Review

Corrosion inhibition of mild steel in sulphuric acid using a bicyclic thiadiazolidine

Conducting polymer/bio‐material composite coatings for corrosion protection

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