Ferric pickling of silicon steel
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United States of America Patent
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Mar 6, 2012
Grant Date -
May 20, 2010
app pub date -
Nov 12, 2009
filing date -
Nov 14, 2008
priority date (Note) -
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Abstract
The pickling process designed for pickling electrical steel strip in a continuous fashion comprising immersing the strip in at least one pickling tub. The pickling tub contains a mixture of HCl, Fe2+, and Fe3+ and a low concentration of HF. Upon exiting the final pickling tub, the strip may be brushed or scrubbed to loosen any residual scale to form a clean strip.
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