1. The electrode through which a primary stream of electrons enters the interelectrode space. 2. The general term for a negative electrode.

Related Terms

CORROSION POTENTIAL

The voltage between a corroding metal and a reference electrode.

ANODE

1. A positive electrode; the plate of a vacuum tube; the electrode of an electron tube through which a principal stream of electrons leaves the inter-electrode space. 2. The positive electrode of an electrochemical device, such as a primary or secondary cell, toward which the negative ions are drawn.

ELECTRODE

A terminal at which electricity passes from one medium into another. The positive electrode is called the anode; the negative electrode is called the cathode.

MIG WELDING

Also termed gas metal arc welding. An arc welding process that produces the coalescence of metals by heating them with an arc between continuous filler metal electrode and the work. Shielding is obtained from an external supplied gas source.

REVERSE POLARITY

The arrangement of direct current arc welding leads with the work as the negative pole and the electrode as the positive pole of the welding arc.

TIG WELDING

An arc welding process in which metals are fused by melting them with an arc between a single tungsten electrode and the work. Shielding is obtained from a gas mixture.

STRAIGHT POLARITY

The arrangement of direct current arc welding leads in which the work is the negative pole and the electrode as the negative pole of the welding arc.

TUNGSTEN ELECTRODE

A non-filler metal electrode used in arc welding or cutting, made mainly from the tungsten metal.

ACCELERATION VOLTAGE

The voltage between a cathode and accelerating electrode of an electron tube.

ACTUATOR

1. A mechanism to activate process control equipment by use of pneumatic, hydraulic, or electronic signals; for example, a valve actuator for opening or closing a valve to control the rate of fluid flow. 2. An auxiliary external electrode used to apply a known electrostatic force to the diaphragm of a microphone for calibration purposes. Also known as electrostatic actuator. 3. A device that produces mechanical force by means of pressurized fluid.

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