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Using the electrochemical impedance spectroscopy to characterize carbon steel in biodiesel medium
(2012-12-01)
Electrochemical impedance spectroscopy measurements using two carbon steel electrodes in soybean biodiesel medium, produced by methylic route, were performed in an electrochemical cell that allows positioning the two ...
Dielectric characterization at high temperature of iron doped potassium strontium niobate ceramic by impedance spectroscopy
(2015-01-01)
Tetragonal Tungsten Bronze structure TTB-type structure has attracted interest by the high anisotropy of the crystal structure. The dielectric characterization of iron-doped niobate of TTB-type structure, with stoichiometry ...
Impedance spectroscopy study of solid-state dye-sensitized solar cells with varying Spiro-OMeTAD concentration
(2010-12-01)
This work reports on the changes of performance of solid-state cells dye-sensitized solar cells with the variation of concentration of spiro-OMeTAD between 5% and 25% in the fabrication of the cell. Variations of charge ...
EIS studies of chalcopyrite involving iron(II) ions
(2017-01-01)
In this work, we present an Electrochemical Impedance Spectroscopy (EIS) study using a carbon paste electrode modified with chalcopyrite (CuFeS2) containing 50 wt% of the mineral (particle size < 38 μm) and graphite (particle ...
VCI evaluation by electrochemical impedance spectroscopy
(2001-01-01)
Volatile Corrosion Inhibitors (VCIs) represent a real improvement in the inhibition of corrosion process for metallic materials. However, the evaluation of this class of inhibitors still remains complex and non-reproducible. ...
Study of the influence of the rare earth elements (Ce3+ and Ce4+) concentration on the siloxanes coating applied on the copper surface
(2012-12-01)
This work studied the influence of the rare earth (Ce3+ and Ce4+) elements concentration in polysiloxane flints deposited on copper by dip-coating process, and evaluated their resistance in a 3.5 wt.% NaCl medium. Classical ...
Electrochemical properties and nano-hardness of anodic oxide film grown over Al-Cu alloy
(2004-12-01)
Al-Cu alloy is largely employed in mechanical and aircraft industries. Usually aluminum and aluminum alloys are submitted to an electrochemical process called anodizing that consists on growing an oxide film on their ...
Influence of thermal treatments in the corrosion behaviour of HVOF Cr 3C2-NiCr coatings
(2001-12-01)
Thermal spray coatings as Cr3C2-NiCr obtained by high velocity oxy-fuel spraying (HVOF) are mainly applied due to their behaviour against aggressive erosive-abrasive and corrosive atmospheres and their thermal stability ...
Impedance spectroscopy study of dehydrated chitosan and chitosan containing LiClO4
(Elsevier B.V., 2010-11-01)
Cast films of chitosan and chitosan containing LiClO4 were characterized using Fourier transform infrared spectroscopy and the thermogravimetric technique. The electric properties of hydrated and dehydrated films were ...
Characterization of bornite (Cu5FeS4) electrodes in the presence of the bacterium Acidithiobacillus ferrooxidans
(2003-10-02)
Bornite electrodes were characterized in the absence or in the presence of Acidithiobacillus ferrooxidans, which is an important microorganism involved in metal bioleaching processes. The presence of the bacterium modified ...