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Direct energy deposition processes that utilize wire feedstock have been deployed to deposit and fabricate near net shape functional metal parts at high deposition rates. Is this just multi-pass welding or is there more to it? Should the material requirements for additive be the same as those defined for welding? Is weld quality the same as part quality? A large metal additive part fabricated using a robotic wire arc additive system will be used to demonstrate the similarities and identify critical differences between essential variables for welding and additive manufacturing. The opportunities for both welding and additive manufacturing to learn and leverage one another to develop unique and novel materials, process controls and further fundamental understanding of metal deposition processes will be outlined.
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Although organic corrosion inhibitors have been widely applied in the energy industry, many details regarding their protection mechanism remain unknown. For example, a corrosion inhibitor adsorbs on the clean steel/aqueous solution interface, driven by electrostatic interaction. With the corrosion productlayer formed, how would the inhibitor adsorption interact with the corrosion product nucleation and precipitation? What is the effect of pre-corrosion in inhibitor testing?
To restrain the failure of plate heat exchanger in customer boiler working fluid, the effect of crevice former type on the corrosion behavior of Type 316L (UNS S31603) stainless steel plate was investigated using electrochemical methods and surface analysis in chloride-containing synthetic tap water.
Over the years, the supercritical carbon dioxide (s−CO2) Brayton cycle has been developed as a promising working fluid to replace supercritical water (s−H2O) Rankine cycle. It could be used in various energy systems, including Generation IV nuclear reactors, concentrated solar power plants, fossil fuel thermal power plants, waster heat recovery, etc. due to its merits of high thermal efficiency, simple physical footprint, compact equipment size, high flexibility on operation, simple layout, compact turbomachinery.1
Corrosion can be a costly and annoying concern in a building's potable water
The forms of corrosion that can occur include:
1) General Corrosion
2) Pitting Attack
3) Concentration Cell Corrosion
4) Dealloying
5) Erosion Corrosion
6) Galvanic Corrosion
These corrosion forms can be avoided by a number of techniques including materials selection, system design and chemical treatment of the water.
Coatings, sometimes in conjunction with cathodic protection, have been used to mitigate the corrosion of storage tanks in building systems, but are not addressed in this paper.
Stress corrosion cracking behavior measured by slow-strain rate tests with accelerated anodic & cathodic reactions. Results indicated the UNSM treatment has a significant effect on the corrosion condition. No effect appeared in the hydrogen embrittlement.
Esta norma conjunta abrange o uso de abrasivos para jateamento com o objetivo de atingir um grau definido de limpeza de superfícies de aço antes da aplicação de um revestimento protetor ou um sistema de revestimento. Esta norma destina-se ao uso por especificadores, aplicadores, inspetores de cobertura ou revestimento ou outros que venham a ser responsáveis por definir um grau padrão de limpeza de superfície.
O foco desta norma é o jateamento abrasivo brush-off. O jateamento abrasivo ao metal branco, o jateamento abrasivo ao metal quase branco, o jateamento abrasivo comercial e o jateamento abrasivo industrial são abordados em normas separadas.
Control de humedad y temperatura se usa para obtener mejor calidad de recubrimientos. Para ingenieros y contratistas quienes hacen especificaciones para proyectos de recubrimiento de tanques y espacios cerrados.
Requirements for "White Metal" - one of five levels of cleanliness of steel surfaces achieved by blast cleaning with the use of abrasives. (White Metal, Near-White Metal, Commercial, Industrial, Brush Off)
Describe el nivel de limpieza abrasiva que se llama "Metal Blanco". Metodos con aire comprimido (limpieza con chorro de arena o limpieza de la ráfaga) . Uno de cinco niveles: Metal Blanco, Metal Casi Blanco, Comercial, Industrial, Superficial