The relative ability of a ferrous alloy to form martensite when quenched from a temperature above the upper critical temperature. Hardenability is commonly measured as the distance below a quenched surfsce at which the metal exhibits a specific hardness ( ...

The ability of a solution to give satisfactory plating at very low current densities. a condition that exists in recesses and pits. This term suggests an ability to cover, but not necessarily to build up, a uniform coating, whereas throwing power suggests ...

Threshold stress intensity for stress-corrosion cracking. The critical stress intensity at the onset of stress-corrosion cracking under specified conditions.

A change in any part of the corrosion system caused by corrosion.

A process of removing soil, scale, or corrosion products from a metal surface by subjecting it as an electrode to an electric current in an electrolytic bath.

A general term used to imply that a part in service (1) has become completely inoperable, (2) is still operable but is incapable of satisfactorily performing its intended function, or (3) has deteriorated seriously, to the point that it has become unrelia ...

The maximum cyclic stress value that a metal can with stand for a specified number of cycles or length of time in a given corrosive environment. See corrosion fatigue strength

Any of the elements of the halogen family, consisting of fluorine, chlorine, bromine, iodine, and astatine.

The potential of an electrode measured with respect to a reference electrode or another electrode when no current flows to or from it.

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 coating process, similar to gas carburizing and carbonitriding, whereby a reactant atmosphere gas is fed into a processing chamber where it decomposes at the surface of the workpiece, liberating one material for either absorption by, or accumulation on ...

Progressive loss of original material from a solid surface due to continuing exposure to cavitation.

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

Corrosion that occurs under some coatings in the form of randomly distributed threadlike filaments.

A form of deterioration that is distributed more or less uniformly over a surface; See uniform corrosion.

Direct current supplied by a device employing a power source external to the electrode system of a cathodic protection installation.

(1) An organic compound in which atoms form more than one coordinate bond with metals in solution. (2) A substance used in metal finishing to control or eliminate certain metallic ions present in undesirable quantities.

Introducing nitrogen into the surface layer of a solid ferrous alloy by holding at a suitable temperature (below Ac1 for ferritic steels) in contact with a nitrogenous material, usually ammonia or molten cyanide of appropriate composition. Quenching is no ...

Plating wherein fine metal powders are peened onto the work by tumbling or other means.

An aqueous solution containing one gram equivalent of the active reagent in 1L of the solution.