Hangzhou Candid I/E Co., Ltd.
What are the nails coated with?

Galvanized nails are coated with zinc to give them added corrosion resistance. 

Blued steel nails are subjected to a flame to give them a bluish oxide finish that provides a certain amount of corrosion resistance.

 So-called cement-coated nails are actually coated with a plastic resin to improve their grip.

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