Electrogalvanizing Production Process
Electrogalvanized coatings are applied to steel sheet and strip by electrodeposition. Electrogalvanizing is a continuous operation where the steel sheet or strip is fed through suitable entry equipment, followed by a series of washes and rinses, and finally into the zinc plating bath.
The most common zinc electrolyte-anode arrangement uses lead-silver, or other insoluble anodes and electrolytes of zinc sulfates. Soluble anodes of pure zinc are also used. In this process, the steel sheet is the cathode. The coating develops as zinc ions in the solution are electrically reduced to zinc metal and deposited on the cathode. Grain refiners may be added to help produce a smooth, tight-knit zinc coating on the steel.
See Also:
Zinc Coatings Publication
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