منابع مشابه
Evaluation of Alternatives to Chlorinated Solvents for Metal Cleaning
The Massachusetts Toxics Use Reduction Institute (TURI) was funded by the Environmental Protection Agency to perform research to support the EPA's 33/50 Program, a voluntary pollution prevention program to reduce national releases and offsite transfers of 17 toxic chemicals. The research project investigated alternatives to chlorinated solvents used for metal degreasing at three companies. The ...
متن کاملIn-situ Cleaning of Metal Photo-cathodes in Rf Guns
Metal cathodes installed in rf guns typically exhibit much lower quantum efficiency than the theoretical limit. Experimenters often use some sort of in situ technique to “clean” the cathode to improve the QE. The most common technique is laser cleaning where the laser is focused to a small spot and scanned across the cathode surface. However, since the laser is operated near the damage threshol...
متن کاملIn-situ Cleaning of Metal Cathodes Using a Hydrogen Ion Beam
Abstract Metal photocathodes are commonly used in high-field RF guns because they are robust, straightforward to implement and tolerate relatively poor vacuum compared to semi-conductor cathodes. However these cathodes have low quantum efficiency (QE) even at UV wavelengths, and still require some form of cleaning after installation in the gun. A commonly used process for improving the QE is la...
متن کاملReplacement of Chlorinated Solvents for In-Line Preplate Metal Cleaning with Environmentally Sound Alternatives
richlorotrifluoroethane (CFC-113) T has been widely used to remove machining oils from metals after those metals have been stamped and formed. In many cases, removal of the hydrocarbon machining oils is necessary before the metals can undergo further processing such as electroplating. In other situations, the stamping occurs as the last step in the process and the formed metal parts must be cle...
متن کاملUV protection and self-cleaning finish for cotton fabric using metal oxide nanoparticles
Ultra-violet protection and self-cleaning action of nano zinc oxide (ZnO) and titanium di-oxide (TiO2) with acrylic binder has been assessed on the cotton fabric using pad-dry-cure method. Different precursors, such as zinc acetate and titanium tetrachloride have been used to synthesize nanoparticles. Zinc acetate is synthesized into nanoparticle by wet chemical technique and titanium tetrachlo...
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ژورنال
عنوان ژورنال: Journal of Japan Oil Chemists' Society
سال: 1969
ISSN: 1884-2003
DOI: 10.5650/jos1956.18.406