High current density zinc sulfate electrogalvanizing process and composition
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United States of America Patent
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Feb 17, 1998
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N/A
app pub date -
Nov 21, 1996
filing date -
Feb 15, 1995
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Abstract
A high current density electrogalvanizing process and composition are disclosed for reducing high current density dendrite formation and edge burn and controlling high current density roughness, grain size and orientation of a zinc coating obtained from a zinc sulfate aqueous acidic electrogalvanic coating bath. The composition comprises a high molecular weight polyoxyalkylene glycol grain refining agent in combination with a sulfonated condensation product of naphthalene and formaldehyde which is used as an antidendritic agent.
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