Abstract: The authors studied the corrosion resistance of sevcial types of brass welded joints by means of the micro-probe potential-scanning method and the galvanic corrosinm experiments.The results show that the corrosion is mainly of the dezincification type.The deposited metal added with aluminium can mitigate this type of selectivecorrosion, because the surface film containing aluminium will reduce the rate of electrochemical corrosion of alloys.It is also shown that the micro-probe potential scanning technique could be considered as a feasible means for estimating the corrosion behavior of brass welded joints in sea water.