A specimen that is notched and subjected to alternating stresses until a crack has developed at the root of the notch.

A buried item, such as junk steel or graphite rods, that serves as the anode for the cathodic protection of pipelines or other buried structures. See also deep groundbed.

The intensity of the internally distributed forces or components of forces that resist a change in the volume or shape of a material that is or has been subjected to external forces. Stress is expressed in force per unit area and is calculated on the basi ...

A process resulting in adecrease of the toughness or ductility of a metal due to the presence of atomic hydrogen. Hydrogen embrittlement has been recognized classically as being of two types. The first known as internal hydrogen embrittlement, occurs when ...

Coating containing a zinc powder pigment in an inorganic vehicle.

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

Cracking or fracturing that occurs through or across a crystal or grain. Also called transcrystalline cracking. Contrast with intergranular cracking.

Corrosion occurring preferentially at grain boundaries, usually with slight or negligible attack on the adjacent grains. Also called intercrystalline corrosion.

Perforation of material in outer space resulting from meteor strikes.

See hydrogen embrittlement.

Any metallic structure that is not intended as part of a cathodic protection system of interest.

Resin formed by condensation of polybasic and monobasic acids with polyhydric alcohols.

Corrosion that proceeds laterally from the sites of initiation along planes parallel to the surface, generally at grain boundaries, forming corrosion products that force metal away from the body of the material, giving rise to a layered appearance.

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

Discontinuities in ci coating (suchasporosity, cracks, gape. and similar Bawd) that allow areas of base metal to be exposed to any corrosive environment that contacts the coated surface.

A metallic coating obtained bydipping the base metal into a molten metal.

Through or across crystals or grains. Also called intracrystalline or transcrystalline.

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

An aggregate of iron or alloy carbides of essentially spherical shape dispersed throughout a matrix of ferrite.

Aging induced by cold working.