Before a second bead is laid over a just completed bead in arc welding, what must be done to the weld area?

In arc welding, before placing a second bead over a previously completed bead, it is essential to clean the weld area to remove all slag. Slag is a byproduct that forms during the welding process, typically consisting of impurities that can hinder the quality of the weld if left unaddressed. If slag is not cleaned away, it can create weak points in the new bead, leading to potential structural failures.

Cleaning the weld area ensures proper fusion between the layers, allowing for a strong and continuous weld. This also helps improve the overall appearance of the weld and promotes better penetration of the filler material into the underlying layers. Ensuring that the work environment is free of contaminants is a critical practice in welding, as it directly influences the integrity and strength of the finished product.