Electroplating is an electrochemical process for depositing a thin layer of metal on a metallic base. Objects are electroplated to avoid corrosion and to obtain a hard surface with an attractive finish.
There are two main types of Electroplating:
Rack Plating is used for larger, more complex or fragile parts. In this procedure, parts are hung on a "rack" that is then submersed in the plating solution. Metal hooks or bands are used to hold the parts in place as well as provide the necessary electrical contact.
Barrel Plating is an efficient and relatively low cost method of plating. Parts are placed inside a barrel that slowly rotates while immersed in the plating solution. Electrical contact is made through the use of danglers that are located inside the barrel. This plating method is usually recommended for smaller parts that are fairly durable and damage resistant. High volumes of parts can be plated with uniform coverage. This plating method is the more economical of the two methods.
Benefits of Electroplating:
Cadmium per QQ-P-416:
- Provides sacrificial protection to the underlying steel
- Prevents the galvanic/bimetallic reaction between steel and aluminum
- Has a low coefficient of friction
- Can easily be soldered
- Furnishes lubricity,
Bright Nickle per QQ-N-290:
- Offers corrosion and tarnish protection
- Provides wear resistance
- Furnishes lubricity
- Imparts a decorative appearance
Nickel-Chrome per QQ-N-290 & QQ-C-320:
- Extremely hard surface
- Excellent wear and heat resistance
- Hygienic and easy to clean
- Provides a bright and brilliant finish
Industrial Hard Chrome per QQ-C-320:
- Reduces friction and adds wear resistance
- Builds up surface area for grinding
- Repairs and restores worn parts
- Increases the life of new parts
- Provides excellent corrosion protection
- Imparts significant abrasion resistance
- Improves the appearance of finished parts
Zinc per Automotive, Trucking and Military Specs:
- Provides a sacrificial coating to protect the underlying steel
- A RoHS Compliant clear blue and yellow chromate coatings are applied to extend the life of the plated components
- Prevents oxidation of the protected metal by forming a barrier and by acting as a sacrificial anode
- Zinc oxide is a fine white coating that prevents a breakdown of the substrate's surface integrity
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