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As part of International Lead Zinc Research Organization (ILZRO) project ZCO-55 entitled “Dross minimization in Galvanizing Bath”, a study was undertaken to sample dross from galvanizing lines using nitrogen and air wiping systems. Top dross samples were collected during normal operating conditions for the production of various product grades from two lines with distinctly different wiping systems. ArcelorMittal Cleveland HDGL uses both nitrogen and air wiping in conventional configuration and USSteel Canada Ltd uses nitrogen wiping exclusively enclosed in a shroud system. A statistical analysis of the rate of formation of dross skimmed robotically as a function of line operating variables such as line speed, coating weight, strip characteristics and knife positioning were carried out. The collected samples were analyzed for chemical composition and microstructural features representative of the variable operating parameters.