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Plating: An Introduction
Electrochemistry is used in anodizing to form a layer of Al2O3 (aluminum oxide) on the surface of aluminum and aluminum alloys. Anodic oxidation can enhance corrosion resistance, wear resistance, hardness, and protect the metal surface by changing the surface state and performance of the material.
It is widely used in mechanical parts, aircraft and automobile parts, precision instruments and radio equipment, daily necessities, and architectural decoration for non-ferrous metals such as aluminum, magnesium, and their alloys.
Plating Information
| Features | Info |
| Materials | Steel, aluminum, and stainless steel |
| Plate | Nickel, electroless nickel, and tin |
| Texture | Glossy, smooth surface |
| Applications | Radiation shields, electrical connections, jewelry |
| Subtypes | Passivation, nickel plating, tin plating, galvanizing |
Aspects of Design
- All critical dimensions and tolerances should account for plating thickness, and the part's ability to fit into a larger assembly should also be considered.
- In electroplating, current is used, and the geometry of the part will impact how the current is distributed across its surface, sometimes unevenly. Advanced plating processes, however, can prevent excessive plating buildup on bends, threads, and sharp corners.
- Corrosion resistance, strength, and other characteristics of the final part should be taken into consideration when selecting plating materials.