What should be done if an arc strike causes visible blemishes?

If an arc strike causes visible blemishes, it is important to grind the area to a smooth contour and ensure that it is crack-free. This approach is crucial because blemishes, such as crater cracks or surface imperfection, can significantly affect the structural integrity of the weld. By grinding the area, you remove any potential stress risers or defects that could lead to failure during service. The smooth surface also helps ensure good adhesion and a sound weld when subsequent welding operations are performed.

Additionally, verifying that the area is crack-free is vital. Cracks can compromise the weld's strength and lead to premature failure. Ensuring a clean, smooth surface prepares the weldment for further processing, whether that be additional welding or finishing operations. Therefore, maintaining high standards of quality and integrity in welding is critical, and addressing blemishes appropriately is a key part of that process.