The gloves protect him from the chemicals in the battery, which include nickel, cobalt and manganese, and shield the battery's delicate tissues from the natural oils on his fingers.
The gilded with gold: nickel, cobalt, gold, gold iron generally use gold cobalt is most.
镀金：有金钴，金镍，金铁，一般使用金钴系最多。
3
Nickel, cobalt and palladium electrodeposits used as barrier layer between copper basis and gold deposit can effectively reduce migration of copper atom to gold upper deposit.