1. Hot-Dip Galvanized: Thick zinc coating, strong corrosion resistance, high price. Hot-Dip Galvanizing Process: Clean the iron parts, then solvent treatment, dry them, and immerse them into the zinc bath. The iron reacts with molten zinc to form an alloyed zinc layer. The process includes: degreasing -- water washing -- acid washing -- pretinning -- drying -- hot-dip galvanizing -- separation -- cooling passivation. 2. Electroplated Zinc: Thin zinc coating, poor corrosion resistance, low price. Electroplating Process: chemical degreasing → hot water washing → water washing → electrolytic degreasing → hot water washing → water washing → strong corrosion → water washing → electroplating zinc-iron alloy → water washing → water washing → brightening → passivation → water washing → drying.