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Structural, ballistic, and mobility requirements have led to the selection of aluminum alloy 2519 as the primary structural material for the Advanced Amphibious Assault Vehicle (AAAV). Two-year seawater alternate immersion exposures of welded AI 2519 panels with and without protective coatings were conducted to simulate the expected AAAV service environment.
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This paper reviews strategy for handling of life extension on old (17,000 km >35 years old, 55,000 > 25 years old) pipelines from preliminary assessment, through repair execution and post repair surveillance. Useful tips for avoiding common pitfalls are also presented.
Biofouling and corrosion issues were investigated with experimental methods. 90-10 Cu-Ni samples were prepared and immersed in bottled seawater with various chlorination levels for up to 6 months.
Harvesting ocean energy will play an important role in supplying fossil-free energy for future generations. The oceanic environments around the world are unfortunately of the toughest possible to operate in. Most technologies use a power take-off (PTO) unit with mechanisms that are placed inside protective enclosures or sealed buoys to protect from the harsh environment in seawater. This gives a barrier from the corrosive electrolyte and biological activity that can deteriorate the components. The energy from the oceans in form of relative movements and forces are transferred to the PTOs with help from complex dynamic sealing systems.
The Santa Ynez Unit (SYU) consists of three offshore platforms and an onshore oil and natural gas processing facility in Goleta, California. The platforms are located between five to nine miles offshore in federal waters. The construction of SYU began in 1976 in the Santa Barbara County in California with the platform Hondo (HO) which, started operations in 1981 to supply the domestic California market.
Copper alloys such as copper nickel (CuNi) and Admiralty Brass (CuZn) are often successful material selections for seawater coolers. The copper alloys successes in these highly corrosive environments can be attributes to the ability of copper to form a protective scale, thus stopping corrosion of the material. On copper alloys in seawater, the protective scale formed comprises a mix of cuprous oxide (Cu2O), copper oxide (CuO) and copper hydroxy chlorides.
Some 325 tables, graphs, and charts. Conversion Tables. Physical & Chemical Data. Corrosion Testing, Atmospheric, Seawater, Cathodic Protection, Protective Coatings. Standards. Organizations. Acronyms. 4th edition 2016 NACE E-BOOK
The refining industry has made significant strides in technology and materials science, resulting in increased efficiency and reliability of various refinery units. Despite these advancements, unexpected failures persist, leading to costly downtime and potential safety hazards. A recent instance of premature failure in a newly commissioned Naphtha Hydrotreating unit (NHT) highlights the challenges that still exist in maintaining the integrity of critical infrastructure.