scholarly journals Moving Electrode Impedance Spectroscopy for Accurate Conductivity Measurements of Corrosive Ionic Media

ACS Sensors ◽  
2020 ◽  
Vol 5 (11) ◽  
pp. 3392-3397
Author(s):  
Nikolaus Doppelhammer ◽  
Nick Pellens ◽  
Johan Martens ◽  
Christine E. A. Kirschhock ◽  
Bernhard Jakoby ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Electrode Impedance ◽  
Conductivity Measurements ◽  
Ionic Media ◽  
Electrode Impedance Spectroscopy

Monitoring Particle Sedimentation in Conductive Suspensions with Moving Electrode Impedance Spectroscopy

2019 ◽  
Author(s):  
Nikolaus Doppelhammer ◽  
Nick Pellens ◽  
Erwin K. Reichel ◽  
Christine E. A. Kirschhock ◽  
Bernhard Jakoby
Keyword(s):  
Impedance Spectroscopy ◽  
Electrode Impedance ◽  
Particle Sedimentation ◽  
Electrode Impedance Spectroscopy

Analysis on corrosion of aluminum-based micro-arc oxidation coating

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yuanhang Yang ◽  
Gang Feng ◽  
Yanhong Gu ◽  
Jie Zhao ◽  
Jian Liang
Keyword(s):  
Corrosion Resistance ◽  
Impedance Spectroscopy ◽  
Sea Water ◽  
Open Circuit ◽  
Al Alloy ◽  
Corrosion Mechanism ◽  
Electrode Impedance ◽  
Content Type ◽  
Micro Arc Oxidation ◽  
Electrode Impedance Spectroscopy

Purpose Aluminum alloy is susceptible to chloride ion attack in sea water, resulting in pitting damage and hence serious security risks for the related applications. To improve the corrosion resistance of Al alloy, micro-arc oxidation (MAO) technology has been developed to produce a protective dense oxide layer on top of Al alloy. However, the mechanism of MAO-induced corrosion resistance is still not fully understood, particularly on local corrosion issue. This paper aims to focus on comprehensively studying the corrosion-resistance mechanism by a series of technologies. Design/methodology/approach The corrosion behavior of samples was studied by open circuit potential (OCP), potentiodynamic polarization (PDP), electrode impedance spectroscopy (EIS) and localized electrode impedance spectroscopy (LEIS) tests in NaCl solution. Findings The MAO-coated Al alloy shows a more positive corrosion potential and a higher corrosion current density compared to the untreated counterpart, indicating a significantly enhanced corrosion-resistance. The study of surface morphology and structure also suggest significantly enhanced corrosion-resistance due to the MAO treatment. Originality/value Based on the results, a new corrosion model was proposed to describe the influence of MAO treatment on the corrosion process and corrosion mechanism of Al alloy, providing insights on the design of the corrosion-resistance coating for metallic alloys in marine applications.

scholarly journals Using Moving Electrode Impedance Spectroscopy to Monitor Particle Sedimentation

2020 ◽  
pp. 1-1 ◽  
Author(s):  
Nikolaus Doppelhammer ◽  
Nick Pellens ◽  
Christine E.A. Kirschhock ◽  
Bernhard Jakoby ◽  
Erwin K. Reichel
Keyword(s):  
Impedance Spectroscopy ◽  
Electrode Impedance ◽  
Particle Sedimentation ◽  
Electrode Impedance Spectroscopy

Impedance spectroscopy and direct current measurements of YSZ films

2002 ◽  
Vol 756 ◽  
Author(s):  
T. Petrovsky ◽  
H. U. Anderson ◽  
V. Petrovsky
Keyword(s):  
Electrical Properties ◽  
Impedance Spectroscopy ◽  
Direct Current ◽  
High Resistance ◽  
Tape Casting ◽  
Planar Geometry ◽  
Film Material ◽  
Conductivity Measurements ◽  
Good Agreement ◽  
Film Conductivity

ABSTRACTIn this study the electrical properties of thin films of Ysubstituted zirconia were investigated. The films were prepared using a polymer precursor technique and investigated in the temperature region 250 to 900°C. It was shown, that impedance spectroscopy (IS) and direct current (DC) conductivity measurements results are in good agreement for the films measured in plane for temperatures greater than 400°C. Due to the high resistance resulting from a planar geometry, the DC measurements were found preferable at temperatures <600°C.Since in planar geometry the films represent a high resistance to the measurement circuit, it is important to minimize sources of electrical leakage, so different sample holders and substrates were investigated. A sapphire substrate and sample holder design using separated alumina single bore tubing for each electrode provided the lowest electrical leakage.The experimental results showed that electrical behavior of all of the films produced at low annealing temperatures (less than 400°C) was similar regardless of Y content. These films have relatively low conductivity and an activation energy of about 1.5eV. The influence of different Y content started to appear after annealing above 600°C.The results of the film conductivity measurements were compared with those for the bulk samples of Y stabilized zirconia prepared from 200nm powder by tape casting. These samples were measured by IS in plane and through the tape. It was shown that electrical properties of bulk and thin film material were similar.

Ionic conductivity measurements of zirconia under pressure using impedance spectroscopy

2002 ◽  
Vol 14 (44) ◽  
pp. 11507-11510 ◽  
Author(s):  
H Takebe ◽  
D Sakamoto ◽  
O Ohtaka ◽  
H Fukui ◽  
A Yoshiasa ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Impedance Spectroscopy ◽  
Conductivity Measurements
Sign in / Sign up

Export Citation Format

Share Document