Solder Erosion Phenomenon
Solder erosion: the dissolving of base material by the molten solder at excessive temperatures or exposure times. Causes damage to the workpiece and can reduce the service life of the joint.
Physikalisch-chemischer Wirkmechanismus
Lot erosion occurs when the liquid filler metal stays in contact with the base metal for too long or at too high a temperature. The filler metal reacts with the chemical components of the workpiece and dissolves them.
Metallurgical Relevance & Welding Risks
Lot erosion can damage the workpiece, such as deformation or wear. This can shorten the life of the weld and lead to further problems. It can also cause unwanted metallization that damages the part.
Werkstattpraxis & Handlungsanweisungen
To avoid lot erosion, take these steps:
• Minimize the contact time of the liquid filler metal with the base metal.
• At high temperatures, use less filler metal and increase travel speed.
• Clean the workpiece thoroughly before welding to avoid chemical reactions.