PROCESS FOR CONTROLLING ZINC VAPOR IN A FINISHING PROCESS FOR A HOT DIP ZINC BASED COATING ON A FERROUS BASE METAL STRIP

摘要

A process for controlling zinc vapor in a finishing process for a hot dip zinc based coating on a ferrous base metal strip in which the strip emerges from the coating bath into an enclosed chamber, by injecting high dew point gas into the chamber. The process is applicable on both a one side and two side coating process. Preferably the atmosphere has about 1-3% water vapor, by volume, for both one-sided and two-sided process.