1. ‌Chemical treatment‌Chemical polishing‌: Use acidic or alkaline solution to remove oxides and oil stains on the surface of the copper lock to restore its luster‌Passivation treatment‌: Form a dense oxide film on the s...

Lock body: usually made of brass (copper zinc alloy), with both hardness and corrosion resistance, containing precision components such as lock core and pin inside.Lock core: The copper lock core has multiple pin holes i...

1. Material characteristicsCopper lock: Copper has natural corrosion resistance, can resist environmental factors such as humidity and oxidation, and has a longer service life. Copper has better ductility and is easy to ...