Detection of corrosion on 304 stainless steel by acoustic emission measurement
Detection of corrosion on 304 stainless steel by acoustic emission measurement
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DOI：
10.1108/00035591011040083
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发表时间：
2010-05
影响因子：
1.2
通讯作者：
Gang Du;Weikui Wang;Shi-zhe Song;Shijiu Jin
中科院分区：
文献类型：
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作者：
Gang Du;Weikui Wang;Shi-zhe Song;Shijiu Jin
目的-本文的目的是报告声发射（AE）特性的304不锈钢在酸性NaCl溶液中的腐蚀过程的调查。设计/方法/途径-在酸性NaCl溶液中的腐蚀行为与恒定负载的试样进行了研究，并分析了腐蚀过程中的AE信号特征。采用声发射和电化学噪声技术对试样的应力腐蚀裂纹进行了检测，并对所获得的数据进行了比较。结果-结果表明，AE技术是非常敏感的304氮控制不锈钢在酸性NaCl溶液中产生的AE信号。在腐蚀过程的不同阶段，声发射信号的特征明显不同。此外，AE测试结果得到EN测试结果的证实。独创性/价值-在不同阶段的腐蚀过程中的AE信号的特征首次获得，这是一个重要的指导，区分不同阶段的腐蚀。
Purpose - The purpose of this paper is to report an investigation of the acoustic emission (AE) characteristics of the corrosion process of 304 stainless steel in acidic NaCl solution. Design/methodology/approach - The corrosion behavior of a specimen with constant load in acidic NaCl solution was studied, and the AE signal characteristics of the corrosion process were analyzed. Stress corrosion cracking of the specimen was detected using the AE and electrochemical noise (EN) techniques, and the acquired data were compared. Findings - The results indicated that AE technology is very sensitive to the AE signals generated by 304 nitrogen controlled stainless steel in acidic NaCl solution. The characteristics of AE signals at different stages of the corrosion process are significantly different. Additionally, the AE test result is confirmed by the EN test results. Originality/value - The characteristics of AE signals at different stages of the corrosion process are gained for the first time, which is an important guide by which to distinguishing different stages of corrosion.