Definition of Manganese Phosphating
Manganese phosphorization treatment, also known as phosphorization blackening, is to form a layer of black protective film on the surface of steel parts. Different from ordinary blackening, manganese phosphorization has more strict requirements for the surface mask thickness, and the conventional manganese phosphorization film thickness can reach “2-14um”. With strong functionality, excellent corrosion resistance, ultra-high wear resistance, beautiful appearance.Manganese phosphate color is usually black.
Types of Phosphating
- Manganese series phosphorization is commonly used in wear-resistant lubrication treatment of steel parts, uniform appearance, no dead corners, to ensure the size tolerance requirements of CNC machining parts, and environmental protection. Manganese series phosphating is often selected by mechanical engineers in mechanical accessories.
- Zinc phospholation is suitable for iron parts, better rust prevention effect, zinc phospholation is commonly used for powder or painting pretreatment. For example, electrophoresis, plastic spraying, and spray painting will use zinc phosphorization, which increases surface smoothness and brightness, and increases the attachment of powder and paint. Zinc phosphorinizing agent produces a large amount of chemical waste, and the treatment cost of waste residue is high. Some factories will use ceramics instead of zinc phosphochemicals, which is more environmentally friendly.
Manganese Phosphating Price
Three methods of manganese phosphorus are usually calculated in China:
First, according to the weight of the part, if the part exceeds 1Kg per part, then the price of manganese phosphorus per kilogram is calculated.
Second, when a single part weighs less than 1Kg, the cost is calculated according to the single surface treatmentprice.
Third, when the area of CNC machining parts is greater than the weight, the cost is calculated according to the unit price of the area.
The price of manganese phosphating depends on the quality of the manganese phosphating stock solution. In Tirapid priority to ensure high quality, reasonable price, better cost performance.
Industry
Steel parts suitable for various industries, including：
Auto Parts—Auto Transmission Gear, drive shaft, piston, piston ring, pulley, pumping rod, auto cylinder liner
Fasstening fittings—M17-H16 lock nuts, bolts, washers, core, cone sleeve,elevator brake accessories
Mechanical accessories—Hydraulic integrated blocks, bearings, castings, chains, engines, steel bushings
Manganese phosphorization operation procedure
Any process of manganese phosphating surface treatment is crucial and indispensable. In addition to high-quality raw materials, the perfect formula requires better technology to complete.
Manganese Phosphating Process VS Zinc Phosphating Process VS Brunieren (Metal Bluing)
| Types | Manganese Phosphating Process | Zinc Phosphating Process | Brunieren/
Metal Bluing |
| Material | Steel Material | Iron Material,Cold rolled sheet, Galvanized sheet, Aluminum sheet | Steel Material |
| Type of processing technology | Custom CNC Machining, custom car parts,CNC milling parts | low volume products,CNC turning parts,sheet metal enclosure | custom cnc milling,custom cnc parts,custom CNC turning |
| Appearance color | Black | Grey | Black/Dark blue |
| Features & Principles | A protective film is formed on the surface of metal parts to make the parts more wear-resistant and have better mechanical properties | Zinc phosphating is to remove rust and oil before spraying to increase the adhesion of powder. Zinc phosphating is often used for iron materials | Compared with phosphating, the cost of metal blackening is lower. Metal blackening also produces a protective film on the metal surface to prevent rust. It is often used for metal parts of nuts or bolts. |
| Phosphating application industry | Automotive,Medical Devices | Mechanical equipment,Auto parts,Household goods, Electronic appliances | Automated equipment，Tools & Instruments |
Materials of Manganese Phosphating
Special steel:
20CrNiMoA(8620),40CrNiMoA,40CrNi2MoA(4340),17-34CrNiMo6,30CrNiMo8,45CrNiMoVA,25Cr2MoVA,12Cr1MoVA,16/20MnCr5,20/40CrMnMoA,5CrNiMo,5CrMnMo,12-37CrNi3A,35CrMoV,12-20Cr2Ni4A,30/35CrMnSi,B16
Bearing steel / spring steel:
GCr15,GCr15SiMn,GCr15SiMo,G20CrNiMoA,9Cr18,65Mn,60Si2Mn,60Si2CrV,50CrV
Carbon steels:
Q235/SPHC/C255
Manganese phosphorization in the processing process often appear yellow phenomenon, there are several reasons will lead to this phenomenon: 1) check whether the standard liquid is high quality, do not use poor quality standard liquid; 2) phosphorization tank regularly clean; 3) table water regularly replacement.
To solve the problem of manganese phosphorization, we must do the following steps: 1) to ensure that the total acidity of the free acid reaches a certain value, 2) the meter adjustment must be effective, 3) to ensure that the free acidity can not be too high, 4) oil and rust removal must be treated clean, 5) the phosphorization time and temperature must be adjusted to the appropriate range.
Manganese phosphorization has a better rust prevention effect than the traditional black, in addition, it can also solve the defects of uneven color and rust spots of the ball grinding cast titanium black.
Phosphochemical rust oil can bring you more benefits: 1, after phosphochemical rust oil, can make the surface of steel parts more bright, 2, can remove the parts surface oil, spots, 3, delay and salt spray time, corrosion resistance function is stronger, corrosion time up to 1-3 years, 4, soaking phosphochemical rust oil prevention operation is simple.
The time of manganese phosphate processing can usually be completed in 1-2 hours.
Yes, Tirapid CNC Manufacture provides the surface thickness and test reports.
Yes, Tirapid has enough ability to process steel parts, both equipment and engineering. Better at complex structural steel parts.