Hassan Mansour Raheem, Ibraheem Altayer, Hayder Shareef Mohamed, Mohammed H. Al-maamori
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引用次数: 0
Abstract
In this study, metallurgical failure analysis of leak observed in SS304 pipe of 355.6 mm out side diameter and 4.78 mm wall thickness is invistigated. The pipe was hydrostatic pressure tested, and the leakage was observed on the pipe after priod of time. Visual test, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS), and energy dispersive X-ray spectroscopy (EDS) were carried out on the samples. Heat tint and griding marks were observed during visual inspection. In addition, scanning electron microscopy reveales many pinholes, tunnel-types in the leaked area. Energy-dispersive X-ray spectroscopy also shows that a multifactorial corrosion process due to stagnant water conditions, bacterial activity, corrosive elements contribte to the leak in the pipe. The results show that the leak damage essentially due to stagnancy of water—improper dry-out of the pipe after hydro test leading to chloride pitting attack and eventually causing leakage. The decomposition of the passive oxide layer due to the high concentration of chlorine and accumulation of microbial byproducts played an important role in examining the SS304 pipe. Preventive measures such as proper inspection, proper welding practices, sanitation, disinfection, and water management are important for corrosion prevention.
期刊介绍：
Petroleum Chemistry (Neftekhimiya), founded in 1961, offers original papers on and reviews of theoretical and experimental studies concerned with current problems of petroleum chemistry and processing such as chemical composition of crude oils and natural gas liquids; petroleum refining (cracking, hydrocracking, and catalytic reforming); catalysts for petrochemical processes (hydrogenation, isomerization, oxidation, hydroformylation, etc.); activation and catalytic transformation of hydrocarbons and other components of petroleum, natural gas, and other complex organic mixtures; new petrochemicals including lubricants and additives; environmental problems; and information on scientific meetings relevant to these areas.
Petroleum Chemistry publishes articles on these topics from members of the scientific community of the former Soviet Union.
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