This process produces a smooth glossy bluish black finish on M.S., ferrous metals and its alloys. Coating thickness obtained is 2 to 3 microns thus it does not alter the dimensions of parts. This type of finish is very decorative and when sealed in our de-watering type (Rust Preventive) it offers long term protection against corrosion and oxidation.
PROCESS : Sr.No. Stage Chemical Concentration Temp. Time (mins.)
Type of tank
1 Degrease METOCHEM – MS-1 5%-7% (w/v) 60-90C 5-15 M.S.
2 Rinse WATER - R.T. 1 M.S./Plastic
3 Derust METOCHEM RR-1 25% (v/v) R.T. 10-20 Plastic
4 Rinse WATER - R.T. 1 M.S./Plastic
5 Bluing METOCHEM FBL 100% (w/v) 300C 5-7 M.S.
6 Rinse WATER - R.T. 1 M.S./Plastic 7 Sealing RPO(DW) - R.T. 3-5
- It Produces Smooth And Glossy Bluish Black On Ms And Its Alloys.
- Sealed With Dw Rust Preventive Oil.
- Coating Thickness – 2-3 Microns
|temperature||300 Degree Celsius|
|dip time||3-7 Mins|