| 摘要 |
PURPOSE:To prevent pitting corrosion and gap corrosion of a watertight structure in an invironment containing chlorine ions by applying two phase stainless steel of austenite and ferrite,whose base is Cr having excellent sea water resistance, to only a corrosion-proof object part. CONSTITUTION:The composition of a filler metal of a buildup weld zone of a corrosion-proof object part of a water tight structure consisting of carbon steel, low alloy steel or austenite stainless steel is as mentioned below. That is to say, it consists of 23-28 Cr, 3-8Ni, 1-3Mo,<0.08C,<2Si,<2Mn, by wt%, and Fe and an inevitable impurity as the balance. Also, two-phase stainless steel of austenite and ferrite having 40-60% ferrite is used. |
