Electrochemical behavior of aluminum alloy AA2024 in aqueous solutions in the presence of caffeine

Sabino, Rondon; Azambuja, Denise Schermann; Gonçalves, Ricardo Júnior de Assis Fernandes

doi:10.1007/s10008-009-0928-9

Cited by 15 publications

(9 citation statements)

References 24 publications

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“…Interestingly, caffeine also showed excellent inhibition efficiency in the presence of Zn 2+ cations due to a synergistic effect that contributed to the formation of a protective film containing the Fe 2+ -caffeine complex and Zn(OH) 2 [18]. Moreover, several electrochemical methods confirmed the ability of caffeine to adsorb onto Zn [19] and low-carbon steel [20] surfaces in ethanol solutions and to inhibit the copper corrosion process in potassium nitrate aqueous solutions containing chloride species [21] and aluminum in sodium sulfate aqueous solution [22]. However, as can be deduced, the interaction between the caffeine molecule and copper and its alloys in acid media has not been investigated in detail.…”

Section: Introductionmentioning

confidence: 75%

“…The main objectives of this study were to gain an insight into the copper protection and adsorption properties of caffeine in sulfuric acid medium, as well as to give continuity to the study of environmentally-friendly corrosion inhibitors carried out by our research groups [19][20][21][22][23][24][25]. The electrochemical and impedance behavior of copper in the absence and presence of xanthine derivatives, namely theophylline, theobromine and caffeine, was firstly investigated in order to compare the performance of three organic compounds with similar chemical structures.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption behavior of caffeine as a green corrosion inhibitor for copper

Souza

Giacomelli

Gonçalves

et al. 2012

Materials Science and Engineering: C

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105

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Section: Introductionmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Adsorption behavior of caffeine as a green corrosion inhibitor for copper

Souza

Giacomelli

Gonçalves

et al. 2012

Materials Science and Engineering: C

Self Cite

105

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“…It can be noticed that the I corr (72 lA/cm 2 ) was higher for the biotic system when compared to control system. The enhanced I corr in the biotic medium was due to the high oxygen diffusion by the formation of biofilm and growth of bacteria (Zhai et al 2015;Sabino et al 2010). Furthermore, noticed that in addition of GIE, the I corr was very lesser (10 lA/cm 2 ) compared to control (39 lA/cm 2 ) and biotic system (72 lA/cm 2 ).…”

Section: Polarization Studiesmentioning

confidence: 91%

“…7) at high frequency region, due to formation of biofilm on the metal surface (Sabino et al 2010). Nyquist plot for the control and biotic system (Fig.…”

Section: Electrochemical Impedance Studiesmentioning

confidence: 99%

Ginger extract as green biocide to control microbial corrosion of mild steel

et al. 2017

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In latest years, various techniques and chemicals have been used for the control of microbial influenced corrosion (MIC) of metals. The application of botanicalbased biocides is one of the effective and practical techniques in the fight against MIC. In the present study, the role of aqueous extract of ginger (Zingiber officinale) (GIE) as green biocide to control MIC of mild steel 1010 (MS) in a cooling water system was investigated. Biocorrosion behavior of Bacillus thuringiensis EN2 on MS and its control by GIE was analyzed by electrochemical measurements. Polarization, electrochemical studies (ES), weight loss measurements (WL), and surface analysis (XRD, X-ray diffraction spectroscopy, and FTIR, Fourier transform infra-red spectroscopy) were performed under various incubation periods up to 4 weeks. We observed that EN2 forms a thick biofilm on the MS metal surface at the end of the incubation period and the WL significantly increased to 993 mg at fourth week when compared to the initial immersion period (194 ± 2 mg). In contrast, with addition of GIE, WL was reduced about 41 ± 2 mg over biotic system (993 ± 2 mg). GC-MS analysis confirmed the adsorption of active component of GIE (b-turmerone) on the metal surface as a protective layer to prevent the biofilm formation and thus leads to reduction of corrosion. The optimum 20 ppm of GIE was found to be effective corrosion inhibition efficiency which was about 80%. From the results of WL, ES, XRD, FTIR, and GC-MS, GIE was identified as biocide and thus inhibits the bacterial growth on MS metal surface and it leads to control MIC. XRD showed that the GIE with EN2 resulted in less formation of corrosion products over biotic and abiotic systems. Overall, this research first shed light on the antibacterial activity of GIE inhibiting biofilm formation, thus reducing the corrosion of MS in cooling water systems.

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“…The equivalent electrical circuit was derived and impedance element values were calculated using frequency response analysis (FRA). Impedance data from the Bi2S3/AAO samples and empty AAO membranes were analysed using a complex plane Nyquist plot [22][23][24]. After successful validation of the experimental data, a Nyquist plot diagram was used to evaluate the number of elements in the Randle's equivalent circuit.…”

Section: Analysis Of Impedance Spectramentioning

confidence: 99%