دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. one of two electrodes in an electrolytic cell;represented as the negative terminal of the cell, it is the area from which electrons flow. In a primary cell, it is the electrode that is wasted or eaten away. 2. in cathodic protection systems, an electrode to which a positive potential of electricity is applied, or a sacrificial anode, which protects a structure by forming one electrode of an electric cell.

the positively charged site in a cell. Oxidation site. The site of metal loss in corrosion.

v: to join metals by utilising the arc created between the welding rod, which serves as an electrode, and a metal object. The arc is a discharge of electric current across an air gap. The high temperature generated by the arc melts both the electrode and the metal, which fuse.

a small disc-shaped electrode used in micro-resistivity pads.

n: 1. one of two electrodes in an electrolytic cell, represented as the positive terminal of a cell. 2. in cathodic protection systems, the protected structure that is representative of the cathode and is protected by having a conventional current flow from an anode to the structure through the electrolyte.

the negative site of a corrosion cell. Reduction reactions are typical.

n: a commonly used nonpolarising electrode used in corrosion control to measure the electrical potential of a metal structure to a surrounding electrolyte to determine the potential for corrosion damage or to monitor the effectiveness of existing control measures. See half-cell.

potential of a corroding surface in an electrolyte relative to a reference electrode under open-circuit conditions.

a curve recorded as a simultaneous SP measurements from two electrodes, each serving as a reference potential for the other.

n: a kind of drilling method in which the rock is melted and evaporated by the power arc generated between the electrode and rock

n: a conductor of electric current as it leaves or enters a medium such as an electrolyte, a gas, or a vacuum.