Results 251 to 260 of about 102,672 (281)

Potentiostatic Measurements of Electrochemical Noise

CORROSION 2001, 2001
Abstract A new potentiostatic electrochemical noise (P-ECN) technique was recently developed to explore further improvement in corrosion monitoring methods. This technique has the ability to enhance monitoring of both general and localized corrosion.
V. Jovancicevic, S. Ramachandran, G. Tipton, E. Atherton   +3 more
openaire   +1 more source

Modeling of electrochemical noise transients

Materials and Corrosion, 2007
AbstractStarting from the elementary corrosion reactions on a passive metal surface a model is developed for the origin of electrochemical noise. The ion currents flowing at the electrochemical reactions are described by the electrons remaining in the metal and then interpreted as a measuring signal.
M. Bierwirth, J. Goellner
openaire   +1 more source

Electrochemical noise at passive iron

Electrochimica Acta, 1988
Abstract With the apparatus described it was possible to measure under potentiostatic conditions at frequencies up to about 1 kHz spectral densities of current noise comparable to the thermal noise at resistances of the order M Ohm. The spectral densities of the current noise at passive iron microelectrodes in neutral borate or acetate buffer ...
K. Nachstedt, K.E. Heusler
openaire   +1 more source

Pattern formation in noise-reduced electrochemical deposition

Physical Review E, 1993
Noise-reduced electrodeposition is performed in an agarose gel medium containing ${\mathrm{CuSO}}_{4}$ solution. Instead of random fractal-like patterns usually seen in ${\mathrm{CuSO}}_{4}$ aqueous solution electrodeposition, the deposit shows a more ordered morphology. The dendritic pattern with an evident main stem can be seen.
, Wang, , Ming, , Bennema
openaire   +2 more sources

Interpretation of Electrochemical Noise Data

Corrosion, 2001
The measurement of the electrochemical noise associated with corroding metals places a number of requirements on the measurement system if good quality data are to be obtained. In particular, aliasing and quantization noise should be avoided. Analysis methods may ignore the ordering of the measured potential or current values by using sequence ...
openaire   +1 more source

Electrochemical Noise Measurements for Corrosion Studies

Materials Science Forum, 1998
This paper examines the various techniques that may be used to analyse electrochemical noise data, and explores the theoretical basis of the more important methods. Methods considered include: ○ Time domain analysis methods - including the direct measurement of the properties of transients from the time record.
R.A. Cottis, M.A. Al-Ansari, G. Bagley, A. Pettiti   +3 more
openaire   +1 more source

Characteristic Electrochemical Noise During Electrochemical Determination of Hydrogen Permeation

CORROSION 2006, 2006
Abstract The Devanathan-Stachurski cell is used to measure hydrogen flux through a metal. The cell consists of galvanostatic cell in which hydrogen is generated on the specimen surface, and an oxidative cell in which the hydrogen oxidation current is measured to determine the hydrogen flux.
Karthik H. Subramanian, John I. Mickalonis, Glenn L. Edgemon   +2 more
openaire   +1 more source

Electrochemical Noise - the Third Octave

CORROSION 2005, 2005
Abstract Electrochemical noise has been used as a corrosion monitoring tool for almost twenty-four years. During this time, the technique has received a high level of interest in both laboratory and field applications. Various analytical approaches in both the time and frequency domains have been developed for data evaluation.
openaire   +1 more source

Flow Effects on Electrochemical Noise Measurement

CORROSION 2010, 2010
Abstract It is known that, in addition to corrosion processes, the generation of electrochemical noise (EN) can be caused by other disturbances such as mass transfer and flow turbulence. In this work the effect of laminar and turbulent flow on the generation of electrochemical noise has been studied using a carbon steel rotating cylinder
Mukhtar Shaglouf, Robert A. Cottis
openaire   +1 more source

Electrochemical noise measurements for field applications

Corrosion Science, 1989
Abstract A technique has been designed to simplify the measurement of noise generated by pitting and crevice corrosion in field applications. It consists of monitoring the current flowing between two similar samples in the same solution through the voltage drop created across a small resistor connecting the two samples.
P.R. Roberge, R. Beaudoin, V.S. Sastri
openaire   +1 more source