Benefits and Limitations of the Use of Pb, Sn and Bi Alloying Elements in Hot Dip Galvanizing Bath: A Review

Abstract Today, lead, bismuth and tin constitute the main group of alloying elements for zinc baths used hot dip galvanizing. These metals improve fluidity liquid zinc, which positively affects consumption improves appearance coating. However, their presence in bath, despite beneficial effects, is controversial due to increased risk metal-assisted cracking (LMAC). Recent studies also indicate that these additives may contribute lowering corrosion resistance coatings. The article analyzes existing knowledge on addition bath presents benefits limitations using them as an additive galvanizing bath.