A cracking process that requires the simultaneous action of a corrodent and sustained tensile stress. This excludes corrosion-reduced sections that fail by fast fracture. It also excludes intercrystalline or transcrystalline corrosion, which can disintegr ...

Corrosion testing in a boiling solution of nitric acid. This test is mainly used to detect the susceptibilty to intergranular corrosion of stainless steel.

One of the relatively scarce and valuable metals: gold, silver, and the platinum-group metals. Also called noble metal(s).

The first coat of paint applied to a surface. Formulated to have good bonding and wetting characteristics; may or may not contain inhibiting pigments.

Being or composed of matter other than hydrocarbons and their derivatives, or matter that is not of plant or animal origin. Contrast with organic.

The part of the total carbon in steel or cast iron that is present in elemental form as graphite or temper carbon. Contrast with combined carbon.

The art of producing metal powders and utilizing metal powders for production of' massive materials and shaped objects.

An increase in hardness and strength caused by plastic deformation at temperatures below the recrystallization range.

Deterioration of material caused by ion impact.

The shear stress on a transverse cross section resulting from u twisting action.

See principal stress (normal).

The permanent (inelastic) distortion of metals under applied stresses that strain the material beyond its elastic limit.

A single, solid, homogeneous crystalline phase containing two or more chemical species.

Brittle fracture of a metal in which the fracture is between the grains, or crystals, that form the metal. Also called intercrystalline fracture. Contrast with transgranular fracture.

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

(1) State of anodically passivated metal characterized by a considerable increase of the corrosion current, in the; absence of pitting, when the potential is increased. (2) The noble region of potential where an electrode exhibits at higher than passive c ...

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

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

Heating an alloy to a suitable temperature, holding at that temperature long enough to cause one or more constituents to enter into solid solution, and then cooling rapidly enough to hold these constituents in solution.

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.