Functions and Uses：
1. Completely free of hexavalent chromium and specialized formulated for acid zinc and alkaline cyanide zinc.
2. GHB-315 is a black coating agent different from the ordinary nickel salt treatment.
3. It is with the repair function to the collision & friction marks that occurred in the barrel or robotic passivation.
4. Applicable to both the barrel plating and rack plating. It can generate a homogenous glossy black appearance.
5. Used in combination with “CHB-19 trivalent chromium phosphate sealing agent”, the time white rust formed is in between 48 to 96 hours in the Neutral Salt Spray Test.