Aluminum’s corrosion resistance, high strength-to-weight ratio and electrical conductivity have long made it an excellent choice for numerous industrial and consumer applications. While aluminum demand has risen sharply in the past decade – with strong growth from automotive and aerospace sectors – pre- and post-welding challenges commonly found in the steel fabrication sector are now as prevalent in the daily welding operations of aluminum fabricators. Welding aluminum poses unique challenges. Defects such as discoloration, weld smut or soot, cracking and porosity are common concerns. For aluminum fabricators seeking safe and efﬁcient methods to remove heat tint and discoloration from MIG, TIG and spot welds, electrochemical cleaning and polishing technologies offer outstanding approaches towards cleaning weld defects in an environment-friendly manner.