Filler Metal Erosion
Brazing erosion is the unwanted removal of the base material by the molten brazing filler metal due to long contact time or high temperatures. This can lead to loss of material and quality issues.
Physical-Chemical Mechanism of Action
The solder reacts chemically with the base material, dissolves it, and carries it away. This process accelerates at high temperatures and long contact times of the solder in the contact zone.
Metallurgical Relevance & Risks During Welding
Solder erosion leads to material loss, which impairs the shape and appearance of the parts. It can also cause quality issues like incomplete soldering or lack of strength. In extreme cases, it can lead to part wear or even non-functionality.
Workshop Practice & Action Instructions
To avoid solder erosion, take the following measures:
• Use a suitable solder material with low zinc content or other stabilizing additives.
• Keep the working temperature as low as possible and control it precisely.
• Reduce the contact time of the solder on the base material through optimized soldering strategies, such as using windings or protective coatings.