国家/地区 中国（4）
IPC部 C（4）
IPC大类 C23（4）
IPC小类 C23C（4） C25D（3）
IPC C25D003/56（3） C23C022/82（2） C23C028/00（2）
发明人 GUO C（4）
公开年 2023（4）
申请年 2020（3） 
专利权人 GUANGZHOU UL.（4）

Protective layer structure of steel bluing and graphene, comprises steel base body, and bluing layer and graphene sealing layer prepared from inside to outside sequentially the base body.

LAI H, CHEN K, GUO C

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

Plating layer structure of zinc-nickel alloy plating layer without chromium passivation and hydroxyl graphene, has chromium-free passivation layer prepared by silane passivation agent.

LAI H, CHEN K, GUO C

Dull nickel-plated and graphene-enclosed plating structure for zinc alloy die-casting parts, has zinc-nickel alloy plating layer that is prepared from inside to outside sequentially zinc alloy base portion.

LAI H, CHEN K, GUO C