Ratio of the depth of the deepest pit resulting from corrosion divided by the average penetration as calculated from weight loss.

See galvanostatic.

Reduction in mechanical properties of a metal as a result of local penetration of solder along grain boundaries.

Corrosive attack that progresses preferentially along interdendritic paths. This type of attack results from local differences in composition, such as coring commonly encountered in alloy castings.

Cracking or fracturing that occurs between the grains or crystals in a polycrystalline aggregate. Also called intercrystalline cracking. Contrast with transgranular cracking.

Aging induced by cold working.

See hydrogen embrittlement.

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

Electrode potential where half-cell reaction involves only the metal electrode and its ion.

The liquor resulting from dissolving molten melt irom the kraft recovery furnace in water. See also kraft process and smelt.

See hydrogenembriltlement.

Changes in contour or discontinuities in structure that cause local increases in stress.

Deep internal cracks caused by hydrogen.

In fatigue, the variation in the stress-intensity factor in cycle, that is, Kmax-Kmin.

See hydrogen embrittlement.

The swelling or bubbling of a coating usually because of heating (term currently used in space and fire protection applications).

Perforation of material in outer space resulting from meteor strikes.

Water that is free of magnesium or calcium salts.

See intergranular corrosion.

A gaseous environment containing hydrogen sulfide and carbon dioxide in hydrocarbon reservoirs. Prolonged exposure to sour gas can lead to hydrogen damage, sulfide-stress cracking, and/or stress-corrosion cracking in ferrous alloys.