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Electrochemical impedance spectroscopy study of corrosion of painted cold-rolled and electrogalvanized sheet steel for automotive use
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1990
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Series: Mining Publications
[PDF-6.46 MB]
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Description:"The U.S. Bureau of Mines has been conducting research on the use of waste-derived zinc as a partial replacement for pure zinc in the electrogalvanizing process. The end product of this process is automotive sheet, which has enhanced cosmetic protection over previously used cold-rolled (cr) steel. In this study, primer- coated specimens of cr and electrogalvanized (eg) steel were subjected to the on-vehicle environment and monitored periodically by electrochemical impedance spectroscopy (eis) during immersion in 1m nacl solution. The results of these tests were compared with immersion-only conditions. Scanning electron microscope (sem) and energy-dispersive x-ray (edx) techniques were also used to evaluate the corrosion processes and compare them with atmospheric exposure specimens. Eis was found to measure the corrosion associated with on-vehicle exposure, thus providing an excellent screening technique for evaluation of the performance of eg automotive sheet steel." - NIOSHTIC-2
NIOSHTIC no. 10008686
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Pages in Document:11 numbered pages
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NIOSHTIC Number:nn:10008686
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