Ag/AgCl微电极束的制作及其原位检测焊缝局部腐蚀的效果  

Fabrication of Silver/Silver Chloride Microelectrode Bundle and Its Use for In-Situ Monitoring of Localized Corrosion of Welded Steel

作　　者：高璐璐[1] 张有慧[2] 曹令华[1] 李成杰[1] 杜敏[1] 

机构地区：[1]中国海洋大学化学化工学院海洋化学理论与工程技术教育部重点实验室,山东青岛266100 [2]海洋石油工程青岛有限公司,山东青岛266520

出　　处：《材料保护》2012年第5期63-65,88,共3页Materials Protection

基　　金：国家科技重大专项子任务(2008ZX05027-004-003-004)

摘　　要：金属焊接件焊缝处易优先发生腐蚀,单个微电极难以测量焊接件同一时刻、不同位置的局部腐蚀行为。自制了Ag/AgCl微电极束,用其测试了X80钢焊接件在天然海水和模拟的咸淡水(0.1 mol/L NaCl溶液)中以及X65-316L焊接件在模拟的酸性海洋大气环境(0.1 mol/L,pH=2的NaCl溶液)中的电位分布,预测了焊材的局部腐蚀行为。结果表明:制作的Ag/AgCl微电极束性能稳定,用其测定X80焊接件和X65-316L焊接件在不同环境中的电位分布,可准确推测腐蚀发生的位置。Ag/AgCl microelectrode bundle was fabricated and used to monitor the potential distribution of welded X80 steel ware in natural seawater and in simulated saline water(0.1 mol/L NaCl solution),as well as the potential distribution of welded X65-316L ware in simulated acidic marine environment(0.1 mol/L NaCl solution,pH=2).The localized corrosion behavior of the welded steel wares was forecasted.Results show that as-fabricated Ag/AgCl microelectrode bundle with stable perfor-mance can be well used to monitor the potential distribution of welded X80 and X65-316L under different environments,and accurately detect the locations of welded metal wares where loca-lized corrosion preferentially occurs.

关 键 词：局部腐蚀 焊缝 微电极束 检测 

分 类 号：TG441.7[金属学及工艺—焊接]