不锈钢水箱泄漏原因分析  

Analysis on Causes for Leading to Leakage of the Stainless Steel Water Tank

作　　者：马洪涛[1] 杨晓洁[1] 杨军[1] 

机构地区：[1]山东省产品质量监督检验研究院,济南250100

出　　处：《现代制造技术与装备》2013年第5期49-50,共2页Modern Manufacturing Technology and Equipment

摘　　要：采用材料显微分析方法,对水处理用储水箱漏水原因进行了分析。结果表明:采用的304不锈钢储水箱母材成分不均匀,存在较多线性δ铁素体组织。在使用过程中,焊接飞溅电弧擦伤处、水垢及淤泥覆盖处出现腐蚀穿孔漏水,其主要原因是焊接过程中焊接飞溅电弧擦伤处附近贫铬,加之较多的δ铁素体存在降低其抗腐蚀性能,导致点蚀穿孔漏水。同时,在水垢及淤泥覆盖处,当覆盖处溶液中的氧耗竭后,不锈钢表面钝化膜开始发生还原性溶解,这样也造成了不锈钢的腐蚀。This paper analyzes the causes leading to leakage of stainless steel water tank for treating water by using material microscopic methods. The result indicates that the stainless steel water tank which is made of stainless steel 304 may suffer leakage during using due to uniform material components about 8 ferrite, Weld spatter and scratch. The scale and mud covered Scale preventing the ingress of oxygen result in reducing dissolution for of the surface of stainless steel that leads to Corrosion and leakage of the water tank. Therefore the manufacturers should pay much attention to selecting and processing material,Cleaning and descaling regularly for the water tank from corrosion, so as to extend the service life to the maximum extent.

关 键 词：水箱 电弧 钝化膜 腐蚀 

分 类 号：TB42[一般工业技术] TG115.28[金属学及工艺—物理冶金]