Release of contained gas in the vaccum of outer space. eg. rapid destructive expansion of plastics and similar materials.

The movement of ions through the electrolyte associated with the passage of the electric current. Also called transport or migration.

Corrosion resulting from direct current flow through paths other than the intended circuit. For example, by an extraneous current in the earth.

The heavy oxide layer formed during hot fabrication or heat treatment of metals.

The reaction of a metal or alloy with a sulfur-containing species to produce a sulfur compound that forms on or beneath the surface on the metal or alloy.

Aqueous solution that contains 1 mole (gram-molecular weight) of solute in 1 L of the solution.

Formation of isolated particles of corrosion products beneath a metal surface. This results from the prcferential reactions of certain alloy constituents to inward diffusion of oxygen, nitrogen, or sulfur.

The surroundings or conditions (physical, chemical, mechanical) in which a material exists.

The reciprocal of polarization resistance (di/dE).

A metal in which the available electron energy levels are occupied in such away that the d-band contains less than its maximum number of ten electrons per atom, for example, iron, cobalt, nickel, and tungsten. The distinctive properties of the transition ...

Same as bipolar electrode.

A chemical substance or combination of substances that, when present in the environment, prevents or reduces corrosion without significant reaction with the components of the environment.

Coating containing a zinc powder pigment in an inorganic vehicle.

(1) An arbitrarily defined temperature that lies within the temperature range in which metal fracture characteristics (as usually determined by tests of notched specimens) change rapidly, such as from primarily fibrous (shear) to primarily crystalline (cl ...

Plastic deformation by the irreversible shear displacement (translation) of one part of a crystal relative to another in a definite crystallographic direction and usually on a specific crystallographic plane. Sometimes called glide.

A metal whose luster has been reduced because of a surface film, usually a corrosion product layer.

Embrittlement of iron-chromium alloys (most notably austenitic stainless steels) caused by precipitation at grain boundaries of the hard, brittle intermetallic sigma phase during long periods of exposure to temperatures between approximately 560 and 980

Ferrire that is formed directly from the decomposition of hypoeutectoid austenite during cooling, without the simultaneous formation of cementite. Also called proeutectoid ferrite.

Removing surface oxides from metals by chemical or electrochemical reaction. Pickling is the removal of any high temperature scale and any adjacent low chromium layer of metal from the surface of stainless steel by chemical means. Where the steel has b ...

The current distribution in an electrolytic cell that is free of polarization.