High current density zinc sulfate electrogalvanizing process...

Details High current density zinc sulfate electrogalvanizing process... High current density zinc sulfate electrogalvanizing process...

C - Chemistry, Metallurgy

25

D

C25D 3/22 (2006.01)

Patent

CA 2169497

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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