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Stress corrosion cracking (SCC) is the growth of crack formation in a corrosive environment. It can lead to unexpected and sudden failure of normally ductile metal alloys subjected to a tensile stress, especially at elevated temperature. SCC is highly chemically specific in that certain alloys are likely to undergo SCC only when exposed to a ...
March 4 – A 32-inch gas transmission pipeline, north of Natchitoches, Louisiana, belonging to the Tennessee Gas Pipeline exploded and burned from stress corrosion cracking (SCC), killing 17 people. At least nine others were injured, and seven homes 450 feet from the rupture were destroyed.
No indications of cracking appear in this picture; the only marks are the "footprints" of the magnetic yoke and drip marks. A close-up of the surface of a (different) pipeline showing indications of stress corrosion cracking (two clusters of small black lines) revealed by MPI. Cracks that would normally have been invisible are detectable due to ...
Cathodic protection (CP; / kæˈθɒdɪk / ⓘ) is a technique used to control the corrosion of a metal surface by making it the cathode of an electrochemical cell. [1] A simple method of protection connects the metal to be protected to a more easily corroded "sacrificial metal" to act as the anode. The sacrificial metal then corrodes instead ...
2002: On April 14, a rupture occurred on the 914-millimetre-diameter natural gas transmission pipeline, at a zone of near-neutral (low) pH stress corrosion cracking, on Line 100-3of the TransCanada PipeLines, at main-line valve 31-3 + 5.539 kilometres, approximately two kilometres from the village of Brookdale, Manitoba. Following the rupture ...
A common form of crevice failure occurs due to stress corrosion cracking, where a crack or cracks develop from the base of the crevice where the stress concentration is greatest. This was the root cause of the fall of the Silver Bridge over the Ohio River , in 1967 in West Virginia , where a single critical crack only about 3 mm long suddenly ...
Stress-Corrosion-Cracking-Quench-Pipe-1.4541-01. Stress corrosion cracking (SCC) is the growth of a crack in a corrosive environment. [53] It requires three conditions to take place: 1)corrosive environment 2)stress 3)susceptible material. SCC can lead to unexpected sudden and hence catastrophic failure of normally ductile metals under tensile ...
Emergency responders evacuated 100 people and Texas DOT closed Highway 285 for 5 miles east and west until the isolated segment was blown down. Investigation found a longitudinal split about 55 feet long in the pipe. The metallurgical report found that the cause was high ph stress corrosion cracking. The pipe was manufactured in 1947. [40]
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