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 |