Application of the dynamic EIS to investigation of transport within organic coatings

Darowicki, Kazimierz; Ślepski, Paweł; Szociński, Michał

doi:10.1016/j.porgcoat.2004.06.007

Cited by 39 publications

(19 citation statements)

References 15 publications

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“…Darowicki and coworkers [136][137][138][139][140][141] proposed a so-called short time FT (STFT). It was later extended to large-amplitude analysis [142].…”

Section: Dynamic Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Electrochemical Impedance Spectroscopy and its Applications

Lasia¹

2014

677

504

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“…Darowicki and coworkers [136][137][138][139][140][141] proposed a so-called short time FT (STFT). It was later extended to large-amplitude analysis [142].…”

Section: Dynamic Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Electrochemical Impedance Spectroscopy and its Applications

Lasia¹

2014

677

504

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show abstract

“…[14] yapılan bir çalışmada bilim dünyasına yeni bir elektrokimyasal yöntem olan Dinamik Elektrokimyasal Empedans Spektroskopisi (DEIS) sunulmuştur. Geliştirilen bu yöntem, başta çukur korozyonunun oluşum mekanizmasını açıklamak [15], organik kaplamalarda zamanla oluşan hasarlarda meydana gelen korozyon mekanizmasını incelemek [16] [24]. DEIS ölçümleri; 4.5kHz-0.03Hz frekans aralığında yapılmıştır.…”

Section: Korozyon Hücresinin Hazırlanmasıunclassified

TOZ METALURJİSİ İLE ELDE EDİLEN DÜŞÜK KARBON ÇELİĞİNİN %3.5 NaCl ORTAMINDAKİ KOROZYONUNA NİYOBYUM VE VANADYUMUN ETKİSİ

Uygur¹,

Gerengi²,

Yıldız³

et al. 2017

NWSA

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ÖZ THE EFFECT OF NIOBIUM AND VANADIUM ON CORROSION OF LOW CARBON STEEL OBTAINED BY POWDER METALLURGY IN 3.5%NaCl ENVIRONMENT ABSTRACTIn this study, corrosion mechanism of new alloys produced with addition of niobium and vanadium at the ratio of 0.05 wt. % and 0.075 wt. % into chemical composition of reference sample was investigated in 3.5% NaCl environment. The Dynamic Electrochemical Impedance Spectroscopy (DEIS) method allowing instantaneous detection of corrosion mechanism was used for the first time with this study for determining the effect of micro alloy elements on corrosion. Surface morphology of the prepared samples were compared with electrochemical data examined by using optical microscope at the end of 15 hour DEIS experiments. According to experimental results, the increase in amount of niobium and vanadium indicated that produced new alloys decreased corrosion rate occurring in 3.5% NaCl environment. R ct value obtained at the end of experiment show increased averagely at rate of 44-57% with the addition of alloy elements. Obtained DEIS data and optical images support each other. It was observed that there were more corrosion and accordingly deformation on surface of sample without addition of alloy elements.

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“…Also, non-stationary environment can result in deforming of the impedance data [31]. Nowadays, the future of the fuel cells is in the use of cars and other objects, which force dynamic changes of the environment, current load, temperature and the others.…”

Section: Introductionmentioning

confidence: 99%

Impedance Measurement and Selection of Electrochemical Equivalent Circuit of a Working PEM Fuel Cell Cathode

Darowicki

Gawel

2017

Electrocatalysis

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The dynamic impedance analysis of direct methanol fuel cell (DMFC) cathode supplied with pure oxygen is presented. Presented results were obtained during dynamic changes of the current density in working fuel cell. Investigation of the occurring processes at cathode was carried with dynamic electrochemical impedance spectroscopy (DEIS). A discussion was conducted based on the determined correlation parameter χ 2 . It was shown that the selection of an appropriate equivalent circuit cannot be carried out only with correlation parameter of analysis between experimental impedance spectra and the equivalent circuit. Comprehensive analysis of equivalent circuit parameter changes during fuel cell working is needed to determine appropriate equivalent model. Thanks to DEIS technique, comparing of the different equivalent circuits proposed in other works during dynamic changes of operating condition could be presented. In addition, the new electrical circuit has been proposed to describe the cathode performance with poisoned electrocatalyst in fuel cell with reduced efficiency.

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Application of the dynamic EIS to investigation of transport within organic coatings

Cited by 39 publications

References 15 publications

Electrochemical Impedance Spectroscopy and its Applications

Electrochemical Impedance Spectroscopy and its Applications

TOZ METALURJİSİ İLE ELDE EDİLEN DÜŞÜK KARBON ÇELİĞİNİN %3.5 NaCl ORTAMINDAKİ KOROZYONUNA NİYOBYUM VE VANADYUMUN ETKİSİ

Impedance Measurement and Selection of Electrochemical Equivalent Circuit of a Working PEM Fuel Cell Cathode

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