NICKEL CHROME (80/20)
Introduction:
PGI 80/20 wire are products appropriate for general use. The materials show an exothermic reaction during the spray process. Also produce coatings with high bond strength that self bond to most metallic substrate, except the copper and tungsten based materials .
It can equivalent to TAFA 06C. MEC 821
PGI 80/20 is widely used for electrical arc thermal spray application, it can produce dense well bonded coatings with excellent machine ability, electrical conductivity and high temperature oxidation resistance up to 1800 degrees F (980 degreesC) widely applied to repair machine parts. Electrical and high temperature corrosion applications.
PGI 80/20 coatings produced have a high degree of structural integrity, are dense and can tolerate elevated temperatures and oxidizing atmospheres. The addition of chromium , in some cases substantial amount, enhances their high temperature corrosion resistance.
Surface Preparation:
Surface should be clean, white metal, with no oxides (rust), dirt , grease, or oil on the surface to be coated. Note: it is best to handle
Surfaces after cleaning. Recommended method of preparation is, to grit blast with 24 mesh aluminium oxide rough grind, or rough machine in a lathe.
Typical applications
1.Oxidation Resistance
2.Heating Elements
3.Thermocouples
4.High Temparature corrosion resistant Alloys
5.Wear Resistant alloys
Chemical composition
Nominal Composition
Min
Max
Typical deposit characteristics
Typical hardness | Bond strength | Deposit Rate | Deposit Efficiency |
HRB 90 | 7300psi | 11lbs/hr/100A | 65-75% |
Physical properties
Grade | Density | Melting point |
NiCr 80/20 | 8.3g/cm³ | 1400⁰c |
Recommended spray parameters
Diameter | Air pressure | Voltage | Amperage | Standoff |
1.6mm | 50-60psi | 28-30 | 100-200 | 4-8in(10-20cm) |
Parameters are typical and may vary depending on equipment used. Contact your equipment manufacturer for optimum spray parameters.