What type of marks can arc strikes leave on a welded surface?

Arc strikes can leave visible marks outside of the weld primarily due to the intense heat generated during the welding process. When the electrode makes an unintended contact with the base metal or nearby surfaces, it creates a small, localized area of overheating that leads to changes in the metal's surface characteristics. This can manifest as discoloration, pitting, or even small burn marks that remain after the welding operation is complete.

These visible marks are particularly critical to monitor because they can affect the integrity and appearance of the finished weld. In many instances, such marks need to be ground down or polished to ensure that the welded joint meets quality standards and is free from potential defects. Understanding the nature and implications of these visible markings can improve a welder's technique and attention to detail, ultimately leading to better overall results in their welding projects.