国家/地区 中国（3）
IPC部 C（3）
IPC大类 C23（3）
IPC小类 C23C（3）
IPC C23C022/83（3）
发明人 LAI H（3）
公开年 2018（2）
申请年 2018（2） 
专利权人 GUANGZHOU UL.（3）

Plating layer structure for preparing chromium-free black conversion film, comprises metal substrate, and zinc-iron alloy plating layer sequentially from inside to outside on metal substrate.

LAI H, GUO C, LI X

Zinc-nickel alloy plating layer structure under corrosion environment comprises metal substrate, zinc-nickel alloy plating layer, trivalent chromium passivation layer, and hydroxyl graphene modified sealing layer.

GUO C, LI X, LAI H

Preparing zinc-nickel alloy plating structure comprises e.g. degreasing, descaling and performing pre-activation treatment of metal substrate, and preparing hydroxy graphene modified sealing layer on trivalent chromium passivation layer.

GUO C, LI X, LAI H