Zinc Rich Epoxy Powder Coating
Feiyang-622 is a zinc rich epoxy based thermosetting powder Coating designed to inhibit rust and adhesion loss on ferrous metals. Feiyang-622 has been designed as an undercoat for powder topcoats. It can also be used as a functional topcoat where appropriate.
Features and Benefits
- Excellent corrosion resistance
- Film integrity
- Very good surface hardness
- No solvent or emissions
- Very good flow
- Sacrificial layer increasing service life
- Long intact life of coating
- Hard wearing / serviceable finish
- Less waste and pollution to the environment
- Excellent filler for topcoats
- Great chemical resistance
- Excellent corrosion protection
Feiyang-622 has been specifically designed for coatings over ferrous metals e.g. gas cylinders and tanks, agricultural machinery, transport (trailers), valves, transformer and garden furniture,.
Salt Spray: Shot blasted mild steel to Class 2.5 (00 hours ASTM B117)
Heat: Excellent resistance to 1°C continuous service conditions.
Humidity: Excellent resistance to 38°C/100% humidity for 1000 hours On blasted steel.
Acid: Resistant to spills of dilute acid.
Abrasion : Excellent resistance to abrasion.
Alkali: Resistant to spills of dilute alkali.
Pencil Hardness: Min 3H
Hardness: Min 18
Flexibility :Pass 80 inch/lb
Cross Hatch Adhesion No removal
Note:Performance will be maximised by following the recommended coating system – see below
Ethyl Acetate: Softens after prolonged contact
White Spirit: Resistant
Xylene: Slight softening/limit contact
Pine Oil :Slight softening (360hrs)
Liquid Detergent: Dilute solution no effect (400hrs)
Diesel: No effect (400hrs)
Methyl Ethyl Ketone: Softens after prolonged contact
96# Octane Petrol: No effect (400hrs)
Specific gravity: 2.2 – 2.3
Gloss Level: 40% at 60°
Shelf life: 6 months when stored below 25°C/dry conditions
Application Method: Electrostatic spray.
Clean Up: Dust or vacuum loose powder. Avoid use of compressed air.
Cure Schedule: Refer cure schedule section of application guide.
Cured Film Thickness
Recommended: 80 μm
Range: 50 – 1 μm
Note: Feiyang-622 has a very high specific density. Additional care should be taken when handling the powder to ensure correct lifting techniques are followed.
Typical coverage rate:
A covering rate of 4 - 5 m2/kg corresponds to 80 μm cured film thickness assuming no loss. Practical spreading rates will vary due to various application methods and conditions as well as surface situations.
To maximise the corrosion inhibition potential of Feiyang-622
Surfaces should be degreased and free from any oxides, mill scale, greases and lubricants for optimal performance.
Substrates should be grit blasted with angular grit to SA 2.5 finish.
To avoid “flash rusting”, ferrous metal should be pre-treated immediately with Zinc Phosphate or
- For fluidised bed, ensure uniform fluidisation of powder. Fluidised powder should resemble “simmering liquid”. Aged or compacted powder may require pre-conditioning for several minutes to fluidise evenly. Feiyang-622 will require the fluidising air pressure to be increased from that of standard powder.
- For box feeders, ensure probe is fully inserted in powder and operated as per manufacturer’s recommendations. As Feiyang-622 has a higher than average specific gravity, box feeders will need to be tested to make sure an adequate transfer of powder can be achieved.
- Apply one coat of Feiyang-622 by electrostatic spray at an average film build of 80 μm.
It is recommended that Feiyang-622 be top coated within 12 hours due to a possible moisture uptake of the coating.
Assuming top coat applied within 12 hours
- Partially cure for 3 – 5 minutes at 1-150°C metal temperature. This partial cure is referred to as a green cure.
- Green cured metal is prone to chipping/cracking if not handled with care. Ensure green cured metal is protected from mechanical damage caused by unloading/stacking.
- Use top coat cure schedule to complete cure of Feiyang-622.
Assuming top coat applied after 12 hours
- Provide full cure for 10 minutes at 0°C metal temperature. Avoid over cure as this will inhibit intercoat adhesion with top coat. Refer note below for further details.
- Store in clean, dry environment until the next stage. The condition of storage between coats has direct effect on adhesion and a consequence on the degree of cleaning before top coating. Avoid UV exposure of primed metal.
Assuming no top coat to be applied
- Provide full cure for 10 minutes at 0°C metal temperature.
- Depending on the interval between priming and re-coating, and the extent of cure, the Feiyang-622 surface may need a light sand and solvent clean to remove build up of deposits. Suitable solvents include: methylated spirits or Prepsol.
- Green cured metal should not be over coated with ripple, textured or other surface effect finishes as continued flow of the Feiyang-622 will impair pattern creation or formation.
- Cure testing is only relevant if the primer is expected to be used as a single coat; or if a fully cured top coat has been applied. Test for cure of the coating by contact with a drop of solvent for 30 seconds. Surface should be wiped dry. Only slight surface softening should occur.
- Check adhesion with a cross cut method ..
- Care should be taken to ensure proper cure is achieved, whilst under cure will reduce the corrosion resistance and mechanical properties, over cure may impair the adhesion of subsequent coats. Refer Precautions and Limitations.
Care and Maintenance
As a general rule, cleaning of externally located powder coating surfaces must take place every six months. Where salts/pollutants are more prevalent such as seaside and industrial areas, a cleaning program should be carried out more frequently.
THREE STEPS TO CLEANING POWD COATED SURFACES
1. Remove loose deposits with a wet sponge (avoid scratching the surface by dry dusting).
2. Using a soft clean cloth and a mild detergent in warm water, clean the powder coating to remove dust, salt or other deposits.
3. Always rinse after cleaning with fresh water to remove any remaining detergent.
WARNING: In some cases, strong solvents recommended for thinning various types of paints and also for cleaning up mastics/sealants are harmful to the extended life of the powder coated surface. These solvents should not be used for
cleaning purposes. If paint splashes or sealants/mastics need to be removed then the following solvents can be used safely: Methylated Spirits, White Spirits, Ethyl Alcohol, Isopropanol.
Precautions and Limitations
- As a result of possible a wide variations of application situations, some products and colours may show variation between Powder Coatings prepared samples and production applied material. Therefore, it is the applicator and/or their customer’s responsibility to ensure the product conforms to their requirements.
- For optimum corrosion performance ensure recommended dry film thickness is obtained.
- Should not be used in acidic environments
- Not recommended for components which are exposed to constant temperatures exceeding 1°C.
- Severe over baking may result in intercoat adhesion problems. For optimal intercoat adhesion refer the cure details in the application section of this data sheet.
- Please refer to all Notes as they are important to the overall finish of this coating
Transport and Storage
Dangerous Goods Class: N/A
Package Group: N/A
Shipment Name: Not dangerous goods. No special transport requirements.