The purpose of electroplating is decorative or protective.
Electroplating is a process that uses an electric current to coat a thin layer of one metal onto the surface of another metal. Based on the provided reference, the primary reasons for doing this are:
- Decorative Purposes: To enhance the appearance of an object.
- Protective Purposes: To improve the durability and lifespan of the underlying material.
The reference specifically states: "Electroplating is the process of using an electric current to make a thin metal coating on another metal for either decorative or protective purposes." It further clarifies one protective application: "Electroplating is used to protect an inferior metal by coating it with a superior metal."
Decorative Applications
Electroplating is frequently used to give items an attractive finish. This can involve applying coatings of aesthetically pleasing metals like gold, silver, or chromium.
- Enhancing Appearance: Making objects look more appealing or luxurious.
- Changing Color/Luster: Altering the surface color and shine of the base material.
- Examples:
- Plating jewelry with gold or silver.
- Coating automotive parts like trims or wheels with chromium.
- Applying a decorative finish to plumbing fixtures.
Protective Applications
A significant purpose of electroplating is to shield the base material from environmental factors or wear. As highlighted in the reference, this often involves using a superior metal to protect an inferior one.
- Corrosion Resistance: Protecting metals like steel or iron from rust and degradation by applying coatings of metals such as nickel, chromium, or zinc.
- Wear Resistance: Making surfaces harder and more resistant to abrasion.
- Improved Conductivity: Applying highly conductive metals like copper or silver to surfaces for electrical applications.
- Examples:
- Zinc plating (galvanization) on steel bolts and nuts to prevent rust.
- Nickel plating on tools for durability and corrosion resistance.
- Chromium plating on machinery parts to reduce wear.
In summary, electroplating serves the dual role of beautifying objects and providing a protective barrier, often extending the life and improving the performance of the base material.
