FatigueThe phenomenon leading to fracture under repeated or fluctuating stresses having a maximum value less than the tensile strength of the material. type cracking of metal caused by repeated or fluctuating stresses in a corrosive environment characterized by shorter life than would be encountered as a result of either the repeated or fluctuating stress alone or the corrosive environment alone.
Measurement of the corrosivity of a water (e.g. Langelier Index, Ryznar Index, AggressiveA property of water which favors the corrosion of its conveying structure. Index, etc.)
The speed (usually an average) with which corrosion progresses (it may be linear for a while); often expressed as though it were linear, in units of mdd (milligrams per square decimeter per day) for weight change, or mpy (milligrams per year) for thickness changes.
Ability of a material to withstand corrosion in a given corrosion system.
Pipe with ridges (corrugations) going around it to make it stiffer and stronger. The corrugations are usually in the form of a sine wave a+B181nd are usually made of galvanized steel or aluminum.