Download the PDFFeatures
Zinc Phosphate
The Zinc Phosphating process is a chemical conversion of the surface steel substrate that by means of a weak etchant produces a slight layer of phosphates on the surface
It is applied in a (bass) drum and (static) frame system with average thicknesses of 02 to 8 microns, obtaining an aesthetic aspect that may vary from grey to black.
The whole process is exempt of Cr VI
Its use is required for protection against storage corrosion (with specific anti-corrosive oils), cold deformation, improved resistance to friction and seizure reduction, reduction of noise and vibration, preparation before painting or before the adhesion of rubber, preparation of quality prior to the application of lamellar Zn.
The weight of the coating is usually 10 to 20 g/m² in micro-crystalline layers, where we may control and adjust the roughness of the coating through grain refiners.
The coefficient of friction and torque for the fixing elements may be modified in some occasions in accordance with the International Standards of the automotive industry.
The embrittlement of the coating is minimal and the finish may be dehydrogenated without difficulty.
“The distribution and thickness of the coating is completely uniform throughout the workpiece since it is a chemical finish.
Respects European Directive 2003/EC/53 and RoHS.”
Manganese Phosphating
Features
The process of black Manganese Phosphating, resistant to corrosion, is applied on steel and cast iron surfaces
It consists mainly of iron and manganese phosphate and reduces wear and tear on workpieces such as pistons, rings, cam shafts, engines, cams, and other similar surfaces.
Layer weight may vary between 10 and 30 gr/m2
Among its properties we have the following:
- It allows a quick braking of moving workpieces without wear, avoiding the contact of metal surfaces with metal.
- It gives the workpiece a lower coefficient of friction, acting as an anti-seize finish.
- Increases the lubrication of treated surfaces, since the coating absorbs oil.
- It covers light scratches produced by the previous regrinding operations.
- It slows the corrosion of the base metal.
- The distribution and thickness of the coating is completely uniform throughout the workpiece since it is a chemical finish.
Respects European Directive 2003/EC/53 and RoHS.
Post Finishes
The process of Manganese Phosphate may be finished with any of these finishes or combining several of them:
- LUBRICANTS FOR FRICTION COEFFICENT (In any of its options)
- DEHYDROGENATION
- WATER-REPELLENT OILS
- PATCH NYLON, MICROENCAPSULATION, ETC *
Applications
- Automotive industry
- Mechanical engineering industry
NOTE: This is general information and is not in any case of a contractual nature since it needs to be confirmed by the conduction of tests and trials on each workpiece individually.
Resistance to Corrosion
- From 05 to 48 Hours under Red Corrosion or base metal corrosion, according to phosphate layer and protection oil applied