Product Introduction:
Blackening agent is made up of many kinds of organic antirust agent, organic colorant, emulsified dispersant and anti rust agent through a number of processes. The surface of steel workpieces is blackened by deposition of film by thermal condensation, which plays the role of rust prevention and protection.PURUN PR509 is a matt weak base waste heat blackening agent. It is suitable for blackening of steel and metal parts after medium temperature tempering. After the blackening, the workpiece has good color and light oiliness, and excellent rust resistance can be obtained without oiling after drying.
Product Features
1.Workpiece surface in dark black, very excellent effect.
2.Suitable for mesh belt furnace, not sticky.
3.Long bath life.
4.According to specific anti-rust time requirements, you can choose whether to apply antirust oil after blackening and drying.
Product Parameter:
| Item |
PR509 |
Standard |
| Appearance |
Black liquid |
Visual |
| Density |
0.90~ 1.05 |
GB/T 4472 |
| pH value |
8.5 ~ 10.0 |
GB/T 9724 |
| Corrosion resistance |
3%CuSO4 dipping |
qualified |
GB/T 15519 |
| 5% oxalate dipping |
qualified |
Shelf life
Products that have passed the factory inspection should be used within a year. If they are not used within this period, they can only be used after passing a re-inspection.
Audited Supplier 
){kind=link}