Electrodes caps used in RSW wear out during the welding of galvanized sheets, caused by the high heating and pressure. In this work was evaluated the wearing influence of different kinds of electrodes caps over mechanical properties and surface finish of the spot weld. Was also observed that the wearing varies according to the hot hardness retention capacity, and the electrode caps surface suffer an intense reaction with zinc from the galvanized sheet. As a result of the electrodes caps wearing, the spot weld diameter is progressively reduced, that can compromise it's structural integrity.
Spot welding; galvanized sheets; wear
