Effect of 2-amino-3-mercaptopropanoic acid (cysteine) on the corrosion behaviour of low carbon steel in sulphuric acid

Oguzie, Emeka E.; Li, Y.; Wang, F.H.

doi:10.1016/j.electacta.2007.07.076

Cited by 174 publications

(54 citation statements)

References 16 publications

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“…The high frequency capacitive loop may be due to a charge transfer process. In the presence of lower concentration of MOH and 5-BMOH and all the concentration of 5-NMOH, the low frequency inductive loop can be attributed to bulk relaxation process of the adsorbed compound or to a dissolution process [50]. It might be also attributed to the re-dissolution of the passivated surface at low frequencies.…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 98%

Inhibiting effects of 5-substituted isatin-based Mannich bases on the corrosion of mild steel in hydrochloric acid solution

2010

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The inhibition effect of all the three Mannich bases against the corrosion of mild steel in 1 M HCl solution was studied by weight loss, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, and atomic force microscopy techniques. Data obtained from EIS studies were analyzed to model the corrosion inhibition process through appropriate equivalent circuit models. The adsorption of Mannich bases obeyed Langmuir adsorption isotherm. Both thermodynamic and activation parameters were calculated and discussed. Polarization curves indicate that they are mixed type of inhibitors. All the Mannich bases were adsorbed physically at lower concentration, whereas chemisorption was favored at higher concentration. The results obtained from weight loss, EIS, and Potentiodynamic polarization are in good agreement.

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Section: Electrochemical Impedance Spectroscopymentioning

confidence: 98%

Inhibiting effects of 5-substituted isatin-based Mannich bases on the corrosion of mild steel in hydrochloric acid solution

2010

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“…Dok sa vremenom vrednost potencijala prvo postaje negativnija, a onda se nakon određenog vremena vrednost potencijala ustali, što je posledica formiranja adsorbovanog sloja na površini elektrode i ukazuje na usporavanje anodnog procesa [35]. S obzirom na neznatno pomeranje vrednosti potencijala otvorenog kola ispitivani inhibitor u kiselom sulfatnom rastvoru se može okarakterisati i kao anodni i kao katodni inhibitor korozije bakra jer je za preciznu kategrizaciju inhibitora kao anodni ili katodni inhibitor potrebna promena vrednosti potencijala od 85 mV, u odnosu na osnovni rastvor [36].…”

Section: Potencijal Otvorenog Kolaunclassified

“…Tokom desetominutnog merenja potencijala otvorenog kola pokazalo se da se vrednost potencijala prvo pomera ka negativnijim vrednostima, a zatim ustali. Ovakvo ponaša-nje pripisuje se formiranju adsorbovanog sloja na površini bakarne elektrode [36] jer nema zaštitnog filma da spreči rastvarnje metala u trenutku uranjanja elektrode u ispitivani rastvor, dok se nakon uranjanja elektrode u rastvor formira film na površini elektrode što vodi ka zaštiti površine. U ovakvim slučajevima smatra se i da katodni procesi dominiraju nad anodnim [37].…”

Section: Potencijal Otvorenog Kolaunclassified

Compounds from the imidazole group as copper corrosion inhibitor in acidic sodium sulphate solution

Simonović¹,

Radovanović²,

Mihajlovic-Petrovic³

et al. 2017

Zas Mat

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“…This is indicative of the adsorption of extract components onto the Zn surface, which in turn influenced anodic corrosion reaction. As reported before [42], it is feasible to classify corrosion inhibitors as anodic or cathodic, if OCP in the inhibitor presence shifts at least +85 mV or -85 mV, respectively, relatively to OCP in the inhibitor absence. However, the negative and the positive shift to OCP in the highest studied dose (30 ppm) of the extract in HCl is about 24 mV relatively to its blank solution.…”

Section: Open Circuit Potential (Ocp)mentioning

confidence: 99%

Corrosion Inhibition of Zn in a 0.5 M HCl Solution by Ailanthus Altissima Extract

Fouda¹,

Rashwan²,

Darwish³

et al. 2018

Port. Electrochim. Acta

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The inhibiting effect of Ailanthus altissima aqueous extract, as a corrosion inhibitor for Zn in a 0.5 M HCl solution, has been evaluated by weight loss (WL), hydrogen evolution (HE), potentiodynamic polarization (PP), electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) techniques. Obtained results showed that this extract offered good protection against Zn corrosion, and exhibited high inhibition efficiencies. The IE was found to increase with an increasing extract dose. Results revealed that this extract acted as a mixed-type inhibitor, and adsorbed onto the Zn surface following Temkin isotherm. Obtained results were justified from the study of surface morphology.Keywords: ailanthus altissima extract; HCl; Zn, corrosion inhibition, WL, HE, PP, EIS, EFM and surface morphology. IntroductionA corrosion inhibitor is a chemical that interacts well with a metal surface, by an adsorption process, to form a thin film/layer that protects the metal surface reducing the movement/diffusion of ions to the latter, or increasing its electrical resistance [1][2]. Zn is one of the most important non-ferrous metals, which finds extensive use in metallic coating. Zn corrodes in a solution with a pH lower than 6 and higher than 12.5, but, within this range, the corrosion is very slow [3]. Under aggressive conditions, Zn metal undergoes corrosion, gaining white colored rust [4,5]. Normally, white rust is observed in galvanized materials, and its occurrence remains a serious commercial problem. In controlling or slowing down the formation of white rust, the search for new inhibitors is essential [6]. A significant method to protect the metals from corrosion is the addition of species

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Effect of 2-amino-3-mercaptopropanoic acid (cysteine) on the corrosion behaviour of low carbon steel in sulphuric acid

Cited by 174 publications

References 16 publications

Inhibiting effects of 5-substituted isatin-based Mannich bases on the corrosion of mild steel in hydrochloric acid solution

Inhibiting effects of 5-substituted isatin-based Mannich bases on the corrosion of mild steel in hydrochloric acid solution

Compounds from the imidazole group as copper corrosion inhibitor in acidic sodium sulphate solution

Corrosion Inhibition of Zn in a 0.5 M HCl Solution by Ailanthus Altissima Extract

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