摘要
对自来水管路腐蚀失效行为进行了金相及电化学测试分析 ,结果表明 ,焊缝区产生大量腐蚀沟槽 ,发生优先腐蚀 .从电化学行为分析 ,焊缝区腐蚀电流密度大于母材 ,母材腐蚀电位高于焊缝区 ,说明焊缝发生优先腐蚀 .
In this paper,a failure analysis was performed for matrix material and weld seam of water supply pipes,by means of optical micrograpy and electrochemical measurement.It is indicated that there are a lot of grooves-like corrosion in the weld zone of the pipe.The electrochemical results show that preferential corrosion on weld seam occurs with larger corrosion current density and the corrosion potential of weld seam is more negative than that of matrix material.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2004年第2期105-106,共2页
Corrosion Science and Protection Technology
