If your brazing rod isn't sticking to copper, don't worry—you're not alone.
There are several common reasons why this might be happening.
Let's break down each issue and provide solutions to help you get back on track.
Why is my brazing rod not sticking to copper? 5 Common Reasons and Solutions
1. Lack of Flux
Flux is crucial because it helps remove oxides from the surface of the base metal.
If you're not using the right flux for copper, like copper flux (plumbers flux), it won't effectively remove oxides.
Make sure to apply the appropriate flux before brazing.
2. Insufficient Heat
Brazing requires heating both the base metal and the filler metal to a specific temperature.
If the copper isn't reaching the required temperature, the filler metal won't melt and bond properly.
Ensure that you're heating the copper sufficiently to reach the melting point of the brazing rod.
3. Incompatible Filler Metal
The filler metal you're using might not be suitable for brazing copper.
It's important to use a filler metal with a lower melting point than the materials being joined.
If the filler metal's melting point is higher than the copper, it won't melt and bond properly.
Check if the brazing rod you're using is specifically designed for copper brazing.
4. Surface Contamination
Any contaminants, such as dirt, grease, or oxides, on the surface of the copper can prevent the brazing rod from sticking.
Clean the copper surface thoroughly before brazing to ensure proper adhesion.
5. Joint Design and Fit
The design and fit of the joint can also affect the success of the brazing process.
The joint should have proper clearance and fit to allow the filler metal to flow and fill the gaps.
If the joint design is inadequate, it may be difficult for the brazing rod to properly bond with the copper.
Continue exploring, consult our experts
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