Attaching metal to copper can be accomplished through several methods, with the best choice depending on the specific application and the types of metals involved. Here's a breakdown:
Soldering
Soldering is a widely used and effective method for joining metal to copper, especially when electrical conductivity is important.
- Best for Copper: Soldering creates a strong and conductive bond, ideal for electrical connections and plumbing.
- Silver Solder: For even greater strength, silver solder is an excellent option, offering a robust joint.
Adhesives
When heat is not an option, adhesives can provide a strong bond between metal and copper.
- JB Weld Original Epoxy: According to references, JB Weld Original epoxy is a reliable choice.
- High Strength: It boasts over 5,000 PSI strength, significantly outperforming 5-minute epoxies.
- Good Bonding: JB Weld is known for its ability to bond well with various metals, including copper.
Other Methods
While soldering and adhesives are common, other techniques exist:
- Brazing: Similar to soldering but uses higher temperatures and a different filler metal, resulting in a stronger joint.
- Welding: Can be used, but requires specialized equipment and skills, and may not be suitable for all metal combinations.
- Mechanical Fasteners: Screws, rivets, or bolts can mechanically join metal to copper, offering a non-permanent solution. Consider these when disassembly or adjustments are needed.
Comparison Table
| Method | Strength | Heat Required | Conductivity | Best Use |
|---|---|---|---|---|
| Soldering | Moderate | Yes | High | Electrical connections, plumbing |
| Brazing | High | Yes | Moderate | High-strength joints |
| Welding | Very High | Yes | Varies | Heavy-duty applications, specialized metal pairings |
| JB Weld Epoxy | High | No | Low | When heat is not an option, general purpose bonding |
| Mech. Fasteners | Variable | No | Varies | Applications requiring disassembly |
Choosing the Right Method
Consider these factors when selecting a method:
- Strength Requirements: How strong does the bond need to be?
- Heat Sensitivity: Can the materials withstand heat?
- Electrical Conductivity: Is electrical conductivity important?
- Dissimilar Metals: Some metals are easier to join than others due to galvanic corrosion.
- Accessibility: Can you easily access the joint for soldering, welding, or mechanical fastening?
