Method of monitoring removal of metal treatment solutions
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United States of America Patent
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Jul 6, 1993
Grant Date -
N/A
app pub date -
Jan 22, 1992
filing date -
Jan 22, 1992
priority date (Note) -
Expired
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Abstract
The invention provides a method of improving cleaning operations for metals. A fluorescent dye is introduced into metal treatment solution and the surface of a metal product is treated with the treatment solution. The metal product with the treatment solution on its surface is worked to deform the metal product. The treatment solution is removed from the surface of the metal product to clean the metal product. The cleaned metal product is illuminated with excitation energy capable of stimulating fluorescence in the fluorescent dye. Fluorescence of the fluorescent dye is optically monitored to determine effectiveness of the removing step.
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