Solder Erosion Coefficient
The solder erosion coefficient measures the removal of base material by the molten solder. A high value leads to cross-section loss and weaker parts.
Physico-chemical mechanism of action
The erosion coefficient (EC) describes how fast the solid base material is worn or dissolved when in contact with the molten filler metal. This process is driven by chemical reactions and mechanical forces between the two materials.
Metallurgical relevance & risks in welding
A high EC means the base material erodes quickly, leading to a loss of cross-section in the parts. This can impair the mechanical properties of the joint and reduce the service life of the part. Additionally, a high EC can lead to uneven weld thickness or even cracking.
Workshop practice & actions
To minimize EC, take these steps:
• Use a filler metal with a low erosion coefficient for the specific base material.
• Ensure welding parameters (temperature, time) are set optimally to achieve a uniform joint.
• Use protective agents or coated electrodes to reduce erosion of the base material.