Our surface treatments focus on improving corrosion protection, adjusting the friction co-efficient and enhancing component aesthetics.
Our surface treatment processes include electroplating, phosphating and GEOMET, which are all chromium(VI)-free.
Electroplating
The steel parts can be economically protected against corrosion with zinc or zinc alloy coatings. Coating sickness is 8~13μm. then by deactivation and seal treatment the corrosion protection can be further enhanced by the addition a secondary passivation and a final sealing coat.
Salt spray test
Type |
White rust |
Red rust |
>96h |
>240h |
|
Zinc & black passivation & sealing |
>96h |
>240h |
>200h |
>1000h |
Phosphating
Anti-corrosion is realized through a layer of phosphate film which is formed on the part surface.
Salt spray test
Type |
SST test |
Manganese phosphating & rust preventing oil |
>24H |
Zinc phosphating & rust preventing oil |
>24H |
GEOMET（GEOMET）
GEOMET coating is formed on part surface through centrifugal immersion or spraying technique, which can effectively avoid hydrogen embrittlement and thus better anti-corrosion effect is realized.
Salt spray test
Type |
CCT test |
SST test |
GEOMET+PLUS |
480H |
1000H |
