ELECTRODEPOSITION OF CHROMIUM FROM TRIVALENT CHROMIUM USING MODULATED ELECTRIC FIELDS
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United States of America Patent
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Issued Date -
Aug 29, 2013
app pub date -
Feb 15, 2013
filing date -
Feb 27, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A layer of chromium metal is electroplated from trivalent chromium onto an electrically conducting substrate by immersing the substrate and a counter electrode in a electroplating bath and passing a modulated electric current between the electrodes. In one embodiment, the current contains pulses that are cathodic with respect to said substrate and in another embodiment the current contains pulses that are cathodic and pulses that are anodic with respect to said substrate. The cathodic pulses have a duty cycle greater than about 80%.
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