Abstract: The corrosion behavior of austenitic stainless steel manual metal-arc welded joint in Na₂S solution was studied by potentiostatic polarization method and microscopic test method.Experimental results indicated that the corrosion resistance of welded joint of A102 electrode is better that of A307 electrode.The increased mass percent of Na₂S accelerates cathodic and anodic process of corrosion reaction at 20℃.In the same concentration of Na₂S solution,the anodic polarization area appears passivation at 80℃.