ELECTROPOLISHING METHOD
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United States of America Patent
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Issued Date -
Aug 13, 2009
app pub date -
Jul 31, 2006
filing date -
Aug 9, 2005
priority date (Note) -
Abandoned
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Abstract
The present invention describes a cost-saving and environmentally conserving process for the electrochemical polishing of steel, in particular of low-alloy steels. The workpieces are rinsed after electropolishing in an arid phosphoric acid-sulfuric acid-bath in a first rinsing step with a phosphoric acid-containing solution, whereby a chemical attack on the freshly polished surfaces is avoided without the use of environmentally harmful and unhealthy inhibitors such as chromates. By recycling of the acids and the rinsing solution, these acids and solutions can be regenerated, whereby the process can be designed effluent-free.
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