Zinc plating in accordance with ASTM B633.
Zinc-nickel plating in accordance with AMS 2417 & ASTM B841.
Zinc-iron plating in accordance with ASTM B842.
| Specification | Classification | |
| ASTM B633 (Zinc Plating) | Service Condition (Thickness) | |
| SC 1 (mild) | 5 microns, for iron/steel (Fe/Zn 5) | |
| SC 2 (moderate) | 8 microns, for iron/steel (Fe/Zn 8) | |
| SC 3 (severe) | 12 microns, for iron/steel (Fe/Zn 12) | |
| SC 4 (very severe) | 25 microns, for iron/steel (Fe/Zn 25) | |
| Types (Supplementary treatment or Finish) | ||
| I | As-plated without supplementary treatment | |
| II | With colored chromate conversion coatings | |
| III | With colorless chromate conversion coatings | |
| AMS 2417 (Zinc-Nickel Plating) | Types | |
| 1 | As plated without supplementary treatment, service temperature 500⁰F (260⁰C) max. | |
| 2 | As plated with supplementary chromate treatment. | |
| Grades | ||
| A | Hexavalent chromate treatment, service temperature 250⁰F (121⁰C) max. | |
| B | Trivalent chromium treatment, service temperature 375⁰F (191⁰C) max. | |
| ASTM B841 (Zinc-Nickel Plating) |
Types (Supplementary Conversion Coatings) | |
| A | With Colorless conversion coatings. | |
| B | With Yellow iridescent conversion coatings. | |
| D | With black chromate conversion coatings. | |
| E | Any of the above plus organic topcoat. | |
| Grades (Thickness) | ||
| 5 | 5 microns minimum | |
| 8 | 8 microns minimum | |
| 10 | 10 microns minimum | |
| ASTM B842 (Zinc-Iron Plating) |
Type | |
| A | Zinc iron with black chromate conversion coating. | |
| Grades (Thickness) | ||
| 6 | 6 microns minimum | |
| 12 | 12 microns minimum | |
| 18 | 18 microns minimum |
