| Finish |
Description |
Advantages |
Disadvantages |
Applications |
| Plain |
Unfinished surface, often with light oil coating. |
Inexpensive, no change to dimensions. |
Prone to corrosion, may not be suitable for all environments. |
General purpose, indoor use. |
| Zinc Plating (Electroplated) |
Zinc coating applied through electrolysis. |
Good corrosion resistance, decorative finish. |
May not be suitable for high-corrosion environments. |
General purpose, automotive, construction. |
| Hot-Dip Galvanized |
Dipped in molten zinc to create a thick, durable coating. |
Excellent corrosion resistance, long-lasting. |
Thicker coating can affect dimensions, may be more expensive. |
Outdoor, marine, structural applications. |
| Cadmium Plating |
Cadmium coating applied for corrosion resistance. |
Excellent corrosion resistance, especially in marine environments. |
Cadmium is toxic, and its use is restricted in some applications. |
Aerospace, marine, military. |
| Chrome Plating |
Thin layer of chromium applied for decorative purposes. |
Highly decorative finish, corrosion-resistant. |
Can be expensive, may not be suitable for high-corrosion environments. |
Automotive, furniture, appliances. |
| Black Oxide |
Chemical treatment to create a black finish. |
Enhances appearance, provides mild corrosion resistance. |
Not suitable for high-corrosion environments. |
Decorative hardware, tools. |
| Phosphate Coating |
Chemical treatment to create a protective layer. |
Improves lubrication, corrosion resistance. |
Not highly decorative, may affect dimensions. |
Automotive, machinery. |
| Organic Coatings (e.g., Paint, Powder Coating) |
Various organic coatings applied for corrosion resistance and appearance. |
Wide range of colors and finishes, good corrosion resistance. |
May chip or wear over time. |
General purpose, outdoor use. |