| Detail | Zinc Al Flake | Hot Dip Galvanise | Zinc-Nical Plating | Zinc Plating | Zinc-Iron Plating |
| life as per ASTM B 117 |
500 to 1500 Hrs | 500 to 800 Hrs | 450 to 800 Hrs | 80 to 250 Hrs | 200 - 450 Hrs |
| Coating Thickness | 8 to 15 Microns | 50 to 100 Microns. |
8 to 15 Microns | 8 to 15 Microns | 8 to 15 Microns |
| Coating behavior | Gives barrier + sacrificial protection |
Gives only sacrificial protection ( ZFC has better Corrosion Protection ) |
Gives Barrier + Sacrificial Protection |
Gives only Sacrificial Protection |
Gives only Sacrificial Protection |
| Control of coefficient of friction |
COF can be controlled in narrow range from 0.08 to 0.25 |
No controlled COF | No controlled COF or plated surface |
No controlled COF on plated surface |
No controlled COF on plated surface |
| Compatibility for Top Coats |
Compatible with most of Top Coats |
Not compatible with Top Coats |
Not compatible with Top Coats | Not compatible with Top Coats | Not compatible with Top Coats |
| Compliance with Environmental Standards |
Meets with all Standards |
Limited compliance with Standards. |
Limited compliance with Standards. |
Limited compliance with Standards. |
Limited compliance with Standards. |
| UV resistance | Resistant to UV | Poor UV Resistance | Poor UV Resistance | Poor UV Resistance | Poor UV Resistance |
| Fluid Resistance | Resistant to Fluids | Poor Fluids Resistant | Poor Fluids Resistant | Poor Fluids Resistant | Poor Fluids Resistant |
| Environmental Impact |
Negligible Pollution During Processing |
High Pollution Puring Processing |
Highly Polluting Process |
Highly Polluting Process |
Highly Polluting Process |
| Processing Temperature |
200 to 350°C | 400 to 450°C | 50 to 60°C | 50 to 60°C | 50 to 60°C |
| Heat Resistance | upto 350°C | upto 200°C | upto 200°C | upto 200°C | upto 200°C |
| Coating thickness variation |
2 to 3 microns | 20 to 30 microns | 2 to 3 microns | 2 to 3 microns | 2 to 3 microns |
| Pretreatment | Dry | Acid (for HDG, Hydrogen pickup possible for high tensile fasteners.) |
Acid (for HDG, Hydrogen pickup possible for high tensile fasteners.) | Acid (for HDG, Hydrogen pickup possible for high tensile fasteners.) | Acid (for HDG, Hydrogen pickup possible for high tensile fasteners.) |
| Suitability for heat treated steels. |
Suitable | Not Suitable. (HDG - Hardness drop for Hardened steels.) |
Not Suitable for hardened parts. (Hydrogen pickup possible) |
Not Suitable for hardened parts. (Hydrogen pickup possible) |
Not Suitable for hardened parts. (Hydrogen pickup possible) |
| coating appearance |
Good | Poor | Good | Good | Good |
| coating hardness | Better coating hardness |
less coating hardness | Better | Better | Better |
