Inconel625合金堆焊层在海水中的腐蚀行为  

Corrosion Behavior of Inconel 625 Alloy Surfacing Welding Layer in Seawater

作　　者：张海兵[1] 刘广义[1] 邢路阔[1] 闫永贵[1] 魏伟荣 

机构地区：[1]中国船舶重工集团公司第七二五研究所青岛分部海洋腐蚀与防护重点实验室,山东青岛266101 [2]中海石油深海开发有限公司,广东深圳516087

出　　处：《材料开发与应用》2015年第1期50-53,共4页Development and Application of Materials

摘　　要：本文采用失重法,电化学极化以及交流阻抗法研究Inconel625合金堆焊层在10℃海水中的腐蚀行为。结果表明,Inconel625合金堆焊层在海水中初期腐蚀速率较高,随后降低到0.0004mm/a。Inconel625合金堆焊层表面没有观察到点蚀孔,表面不存在钝化膜。合金堆焊层在海水中为均匀腐蚀,海水中浸泡90天耐腐蚀性能稳定。Inconel 625 alloy as surfacing welding layer of composite tube has been widely used in the marine gas transportation. Weight loss method,electrochemical polarization and AC impedance were used to investigate the initial corrosion behavior of Inconel 625 alloy surfacing welding layer in seawater at 10 ℃. The results showed that,the initial corrosion rate of the layer was fast,but then dropped quickly to 0. 000 4 mm/a. No pitting and passive film weve observed on the surface of the Incomel 625 surfacing welding layer. The surfacing welding layer exhibited uniform corrosion and its anti-corrosion property was excellent after 90 days of immersion in seawater.

关 键 词：INCONEL 625合金 堆焊层 海水 腐蚀性能 

分 类 号：TG172.5[金属学及工艺—金属表面处理]