Monitoring Corrosion Using Vibrational Spectroscopic Techniques

Li, Shengxi

doi:10.1016/b978-0-12-411467-8.00020-9

Cited by 4 publications

(3 citation statements)

References 136 publications

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“…Li. [ 35 ] commented that Raman spectroscopy and FTIR could be used to monitor the progress of corrosion on metal with an EP coating. In this research, we adopted the FTIR spectrum for verifying changes in featured function groups, mainly nitrogen-related amine and imide bonds as well as carboxyl groups.…”

Section: Resultsmentioning

confidence: 99%

Interpenetration Networked Polyimide–Epoxy Copolymer under Kinetic and Thermodynamic Control for Anticorrosion Coating

Chen

Whang

et al. 2023

Polymers

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Epoxy (EP) was copolymerized with polyamic acid (PAA, precursor of polyimide (PI)) with termanil monomers of (1) 4,4′-Oxydianiline (ODA) and (2) pyromellitic dianhydride (PMDA) individually to form (PI-O-EP) and (PI-P-EP) copolymers. The FTIR spectrum of PI-O-EP copolymerization intermediates shows that some amide-EP linkages were formed at low temperature and were broken at higher temperature; in additoin, the released amide was available for subsequent imidization to form PI. The curing and imidization of the amide groups on PAA were determined by reaction temperature (kinetic vs. thermodynamic control). In PI-P-EP, the released amide group was very short-lived (fast imidization) and was not observed on FTIR spectra. Formation and breakage of the amide-EP linkages is the key step for EP homopolymerization and formation of the interpenetration network. PI contributed in improving thermal durability and mechanical strength without compromising EP’s adhesion strength. Microphase separations were minimal at PI content less than 10 wt%. The copolymerization reaction in this study followed the “kinetic vs. thermodynamic control” principle. The copolymer has high potential for application in the field of higher-temperature anticorrosion.

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Section: Resultsmentioning

confidence: 99%

Interpenetration Networked Polyimide–Epoxy Copolymer under Kinetic and Thermodynamic Control for Anticorrosion Coating

Chen

Whang

et al. 2023

Polymers

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“…The idea of a localized measurement is to examine areas within a sample that differ in their activity individually, which has promoted many studies. Recently, the development of microelectrode techniques and scanning electrode techniques has made it possible to measure electrochemical processes on a local scale, which has attracted lots of studied on the local electrochemical processes on corroding surfaces and investigations of localized corrosion [27]. Scanning Vibrating Electrode Technique (SVET) is a powerful tool to permit a better understanding of the mechanisms and processes of corrosion at defects and underneath coatings [28].…”

Section: Introductionmentioning

confidence: 99%

Application of Electrochemical Techniques on Study of Effect of Nano-ZnO in Conductive Polyaniline Containing Zinc-Rich Primer

Castaneda

2018

International Journal of Spectroscopy

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Effect of zinc oxide nanoparticles on anticorrosion performance has been studied in conductive polyaniline containing zinc-rich primer in 3.5 wt% NaCl solution, using Electrochemical Impedance Spectroscopy (EIS) and localized electrochemical Scanning Vibrating Electrode Technique (SVET). The results showed that the addition of nano-zinc oxide particles in conductive polyaniline containing zinc-rich primer made the reaction of zinc more stable and slower, further increasing the effective cathodic protection period. EIS and SVET results confirmed that three performance evolution stages were obtained for zinc-rich primer being immersed in 3.5 wt% sodium chloride solution.

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“…The shifts in the spectra indicate that the interaction between the extracts and aluminum occurred through the functional groups present in EEPgS. Moreover, it can be affirmed that the functional groups have coordinated with the Al 3+ formed on the metal surface, resulting in the formation of Al 3+ extract complex on the metal surface, which promotes the inhibition of the aluminum sample surface [26][27]. …”

Section: Scanning Electron Microscopymentioning

confidence: 99%

Corrosion Inhibition of Aluminum by Psidium Guajava Seeds in HCl Solution

Sharma¹,

Sharma²

2016

Port. Electrochim. Acta

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The corrosion inhibition and adsorption of ethanol extracts of Psidium guajava seeds (EEPgS), for aluminum in 0.5 N HCl solutions, were investigated using conventional weight loss, FTIR spectroscopy and SEM analysis techniques. The results showed that EEPgS performed well as inhibitor for the corrosion of aluminum in hydrochloric acid media. FTIR results showed that the inhibition mechanism was by adsorption process, through the functional groups present in the extract. Inhibition efficiency increased with increasing concentration of the plant extract, but decreased with the temperature rise. The weight loss data were fitted into a number of isotherms, though Langmuir model was found to be the best fit. The SEM photographs confirmed the protection offered by the extract on the surface of the metal.Keywords: Psidium guajava; aluminum; corrosion; inhibitor; adsorption. IntroductionIndustrial processes such as prickling and acid cleaning often involve contact between a metal and aggressive solution, consequently, the metal is prone to corrosion. In order to reduce the menace due to corrosion of industrial installations, several steps have been adopted. However, one of the best options available for protecting metals against corrosion involves the use of corrosion inhibitors [1][2]. The majority of well-known inhibitors are organic compounds containing hetero atoms, such as O, N, S, and multiple bonds, which allow an adsorption on the metal surface [3]. These compounds adsorb on metal surface and block the active surface sites to reduce the corrosion rate. Adsorption may take place by four different mechanisms through organic molecules at the metal/solution interface: (a) electrostatic attraction between the charged molecules and the charged metal, (b) interaction of uncharged electron pairs in

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Monitoring Corrosion Using Vibrational Spectroscopic Techniques

Cited by 4 publications

References 136 publications

Interpenetration Networked Polyimide–Epoxy Copolymer under Kinetic and Thermodynamic Control for Anticorrosion Coating

Interpenetration Networked Polyimide–Epoxy Copolymer under Kinetic and Thermodynamic Control for Anticorrosion Coating

Application of Electrochemical Techniques on Study of Effect of Nano-ZnO in Conductive Polyaniline Containing Zinc-Rich Primer

Corrosion Inhibition of Aluminum by Psidium Guajava Seeds in HCl Solution

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