Aluminum welding weld cleanup requirements1, in hot water using a stiff brush scrub carefully welded joints.2, the weldment at a temperature of 60 ~ 80 ℃, mass fraction of 2% to 3% aqueous solution of chromic acid or potassium dichromate solution dipping about 5 ~ 10min, and carefully Welding Electrode Materials scrubbing with a stiff brush. Or put in the weldment 15 ~ 20 ℃ mass fraction of 10% nitric acid solution, dip 10 ~ 20min.3, washed in hot water washing weldment.4, the weldment or drying with hot air drying oven at 100 ℃ for