The electroplating processes commonly used for full threaded rods (also called all-thread rods or fully threaded screws) depend on the desired properties, such as corrosion resistance, wear resistance, appearance, and cost.
Author: Marisa
The electroplating processes commonly used for full threaded rods (also called all-thread rods or fully threaded screws) depend on the desired properties, such as corrosion resistance, wear resistance, appearance, and cost. Here are the most widely used electroplating methods:
Standard Zinc Plating – Basic corrosion protection, cost-effective.
Blue/White Zinc – Clear or slightly bluish finish (chromate passivation).
Yellow Zinc (Zinc Chromate) – Better corrosion resistance, yellowish appearance.
Black Zinc – Aesthetic black finish with moderate corrosion resistance.
RoHS-Compliant Zinc (Trivalent Chromate) – Replaces toxic hexavalent chrome.
Applications: General construction, fasteners, outdoor use.
Bright Nickel – Smooth, shiny finish, good wear resistance.
Matte Nickel – Less reflective, used for functional rather than decorative purposes.
Nickel-Chromium (Duplex Plating) – Adds extra corrosion/wear resistance.
Applications: High-corrosion environments, decorative hardware, chemical industry.
Decorative Chrome – Thin layer (0.002–0.02 mm), shiny appearance.
Hard Chrome – Thicker (0.02–0.1 mm), extreme wear resistance.
Applications: Industrial machinery, hydraulic systems, high-wear applications.
Improves adhesion for subsequent plating (e.g., nickel or chrome).
Used in electrical applications for conductivity.
Good corrosion resistance, solderability, and non-toxicity.
Used in food processing, electronics, and marine environments.
| Plating Type | Corrosion Resistance | Wear Resistance | Appearance | Cost |
|---|---|---|---|---|
| Zinc (Yellow/Blue) | Good (with passivation) | Moderate | Metallic/Yellow | Low |
| Nickel | Excellent | High | Shiny/Satin | Medium-High |
| Hard Chrome | Very Good | Very High | Bright/Metallic | High |
| Tin | Moderate | Low | Dull Gray | Medium |