Current Distribution during Electroplating Within a Tubular Electrode of High Ohmic Resistance

1983 ◽  
Vol 130 (3) ◽  
pp. 559-567 ◽  
Author(s):  
Mordechai Ben‐Porat ◽  
Joseph Yahalom ◽  
Eliezer Rubin
Keyword(s):  
Current Distribution ◽  
Ohmic Resistance ◽  
Tubular Electrode ◽  
High Ohmic Resistance

Lack of electrical interaction between proximal bundle branches and subjacent muscle

1977 ◽  
Vol 42 (2) ◽  
pp. 235-239 ◽  
Author(s):  
D. A. Lathrop ◽  
J. C. Bailey
Keyword(s):  
Muscle Activation ◽  
Ohmic Resistance ◽  
Voltage Change ◽  
Transmembrane Voltage ◽  
Electrotonic Interactions ◽  
Current Threshold ◽  
Spontaneous Frequency ◽  
Microelectrode Techniques ◽  
High Ohmic Resistance ◽  
Septal Myocardium

Microelectrode techniques were used to assess the importance of subthreshold electrotonic interactions between the canine proximal bundle branches and adjacent septal myocardium, and vice versa. Bundle branch action potential duration, maximal rising velocity of phase O, current threshold requirements for all-or-none depolarization, transmembrane voltage, and spontaneous frequency were not altered by adjacent septal muscle activation. Activation of the proximal bundle branches did not change the transmembrane voltage of immediately subjacent muscle cells; likewise, all-or-none activation of ventricular septal muscle did not effect a voltage change in the overlying proximal bundle branches. We conclude that a high ohmic resistance barrier between proximal bundle branch and subjacent muscle precludes significant electrotonic interactions between these neighboring structures.

Numerical Modeling of Galvanic Corrosion Behaviors on Uranium Surface

2013 ◽  
Vol 702 ◽  
pp. 140-144
Author(s):  
Ping An Shi ◽  
Hong Liang Zhou
Keyword(s):  
Numerical Simulation ◽  
Current Distribution ◽  
Galvanic Corrosion ◽  
Corrosion Current ◽  
Electrode Kinetics ◽  
Uniform Corrosion ◽  
Corrosion Rates ◽  
Ohmic Resistance ◽  
Circular Defect ◽  
Corrosion Behaviors

The Uranium and Titanium corrosion rates are described by a Tafel’s relationship, and the cathodic protection of Uranium is a function of a Wagner number. A numerical simulation of galvanic corrosion of Uranium surface under thin layer electrolyte is presented. The model considered that the effect of a circular defect and oxygen reduction and corrosion in the Uranium surface, the effect of electrolyte thickness and conductivity and defect radius on corrosion current distribution of Uranium with is investigated. The results shows that the corrosion rate at the center is non-uniform, and it could lead to the formation of a hemispherical-shaped pit. And the effect of radius is to increase the importance of the electrode kinetics relative to ohmic resistance, and to increase the potential difference between the center and edge of the Uranium surface, resulting in non-uniform corrosion current distribution.

Study of the Effect of Electric Field Distribution to the Pulse Electrochemical Machining

2011 ◽  
Vol 291-294 ◽  
pp. 3073-3077
Author(s):  
Zhao Long Li ◽  
Shi Chun Di ◽  
Dong Bo Wei ◽  
Peng Xiang Lv
Keyword(s):  
Electric Field ◽  
Field Distribution ◽  
Current Distribution ◽  
Electric Field Distribution ◽  
Electrochemical Machining ◽  
Maximum Distance ◽  
Hole Depth ◽  
Hole Radius ◽  
Reaction Speed ◽  
Tubular Electrode

This paper studies the electrochemical machining on the surface of nickel-based alloys with a tubular electrode and analyses the effect of electric field distribution and current distribution to the shape of concave holes during the processing. It is concluded that the maximum distance between the positive and negative poles in the reaction of electrochemical machining. It is analyzed that order of electrochemical machining surface holes in the direction of hole radius and hole depth and the variation laws of reaction speed.

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