What effect can excessive heat have on solder joints?

Excessive heat can significantly weaken or even melt the base materials involved in solder joints. When the temperature exceeds the threshold for the metals being joined, it can cause structural changes or damage, compromising the integrity of the joint. Melting can lead to the complete failure of the joint, as the materials may not re-adhere properly once they cool. Additionally, overheating can alter the properties of the base metals, making them more susceptible to corrosion or cracking, further undermining the bond.

While it’s true that heat is essential to the soldering process, providing just the right amount is critical to ensure a robust joint. Too much heat, however, surpasses the optimal range needed for proper solder flow and adhesion, leading to detrimental effects instead of enhancing the strength or bonding of the solder joint.