AISI 304 quality stainless steel has become an indispensable material for daily use thanks to its high corrosion resistance, high heat conductivity, formability and visual properties [1-2]. Stainless steel flat materials are produced with hot rolling, annealing and cold rolling after the casting process and then it is prepared for service processes by ensuring annealing and surface passivation. In this study, the effect of annealing emperature, time and the difference of acidification processes on the corrosion resistance of the material is investigated.