The rupture was in a crystal-growth autoclave that had undergone stress corrosion cracking and was inadequately inspected; recommendations from a previous incident were ignored.
32.
Rust in the eyebar joint had caused a stress corrosion crack, which went critical as a result of high bridge loading and low temperature.
33.
For example, chloride stress corrosion cracking of austenitic stainless steel has been experienced in hot-water jacketed pipes carrying molten chocolate in the food industry.
34.
But based on a videotape from a remote-controlled camera sent into the tube, " it's probable that this was stress corrosion cracking, " he said.
35.
The cause of cracking did not become clear until metallographic results were combined with stress corrosion cracking and hydrogen embrittlement tests, followed by fracture mechanics analysis.
36.
Corrosion occurs in various forms in the refining process, such as pitting corrosion from water droplets, embrittlement from hydrogen, and stress corrosion cracking from sulfide attack.
37.
Both materials were used in hot and cold water domestic plumbing, and stress corrosion cracking caused widespread failures in the USA in the 1980s and 1990s.
38.
The flaw was near the nozzle for a control rod drive mechanism and attributed to primary water stress corrosion cracking, though no actual leakage was detected.
39.
But based on a videotape from a remote-controlled camera sent into the tube, " it's probable that this was stress corrosion cracking, " he said Thursday.
40.
The phenomenon should not be confused with stress corrosion cracking, where corrosion ( such as pitting ) leads to the development of brittle cracks, growth and failure.
