I have a big piece of carbon I like to use as a backer for filling in large holes.In the case of this bucket, I cant tell if the metal is worn away or just pulled apart. If it is worn away. plating with flat bar is going to be the easiest fix. if just pulled apart and cant be beat back together. I would take my piece of carbon and lay in the crack and start running beads until the weld reached both pieces. Once one side had a good bead and the gap was completely filled, I would flip the bucket and run a few beads on the opposite side. Once crack is repaired, I would start welding raised xxx's beads across the outside to help keep it from wearing thru again. Even 7018 will makes a pretty good wear pad if you dont have or cant get good hard surface rods