Removal of niobium second phase particle deposits from pickled zirconium-niobium alloys
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United States of America Patent
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Jul 7, 2009
Grant Date -
Sep 25, 2008
app pub date -
Feb 12, 2008
filing date -
Feb 15, 2007
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Abstract
The present invention relates generally to a process and chemical composition for the removal of adherent niobium-rich second-phase particles (SPPs) from pickled niobium-containing zirconium alloys which includes applying to the alloy surface a chemical composition comprising alkaline hydrogen peroxide; an alkali metal meta-silicate; and a magnesium salt.
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