The process determines classification: electrolytic (electroplated) zinc coating goes under 721220, while hot-dip or other non-electrolytic galvanizing goes under 721230. The coating weight and surface appearance differ, and mills typically certify the process on the material test report.

Yes. Uncoated strip under 600 mm wide is classified in 7211, but once it receives a paint, varnish, or plastic coating it moves to 7212, specifically subheading 721240. The coating must be applied before export; post-import painting does not change the import classification.