A pair of dissimilar conductors, commonly metals, in electrical contact. See also galvanic corrosion.

The number of cycles of stress that can be sustained prior to failure under a stated test condition.

A process involving conjoint corrosion and cavitation.

(1) A type of corrosion attack (deterioration) uniformly distributed over metal surface. (2) Corrosion that proceeds at approximately the same rate over a metal surface. Also called general corrosion.

The difference between the actual electrode potential when appreciable electrolysis begins and the reversible electrode potential.

The mass of unit volume of a material at a specified temperature.

Electrodepositing a metal or alloy in an adherent form on an object serving as a cathode.

Surface having a thin, tightly adhering, oxidized skin (from straw to blue in color), extending in from the edge of a coil or sheet.

A compound with a central atom or ion bound to a group of ions or molecules surrounding it. Also called coordination complex. See also chelate, complexation, and ligand.

Loss of carbon from the surface layer of a carbon-containing alloy due to reaction with one or more chemical substances in a medium that contacts the surface. See also dealloying.

The potential corresponding to the maximum active current density (critical anodic current density) of an electrode that exhibits active-passive corrosion behavior.

The phenomenon leading to fracture under repeated or fluctuating stresses having a maximum value less than the tensile strength of the material. Fatigue fractures are progressive and grow under the action of the fluctuating stress.

The face-centered cubic form of pure iron, stable from 910 to l400

One or more anodes installed vertically at a nominal depth of 15 m (50 ft) or more below the earth's surface in a drilled hole for the purpose of supplying cathodic protection for an underground or submerged metallic structure. See also groundbed.

The current flowing to or from a unit area of an electrode surface, generally expressed as amps per sq ft or milliamperes per sq ft (also milliamps per sq cm, etc).

The selective attack of one or more components of a solid solution alloy; eg. dezincification, dealumination etc. See dealloying.

(1) A reaction in which there is an increase in valence resulting from a loss of electrons. Contrast with reduction. (2) A corrosion reaction in which the corroded metal forms an oxide; usually applied to reaction with a gas containing elemental oxygen, s ...

In austenitic stainless steels the precipitation of chromium carbides, usually at grain boundaries, on exposure to temperatures of about 550 to 850

The ratio of the electric current density to the electric field in a material. Also called electrical conductivity or specific conductance.

Ability of a metal to withstand corrosion in a given corrosion system.