Acoustic emission during the electrochemical corrosion of 304 stainless steel in H2SO4 solutions
Acoustic emission during the electrochemical corrosion of 304 stainless steel in H2SO4 solutions
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DOI：
10.1016/j.corsci.2010.09.056
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发表时间：
2011
影响因子：
8.3
通讯作者：
Jian Xu;Xinqiang Wu;E. Han
中科院分区：
文献类型：
--
作者：
Jian Xu;Xinqiang Wu;E. Han
研究了304不锈钢(304SS)在H2SO4溶液中电化学腐蚀过程中的声发射(AE)行为。与跨钝溶解相关的声发射信号在低pH溶液中检测到，并且受电流密度和预应变的影响非常小。在氢气泡演化过程中，AE信号幅度与氢气泡直径之间存在弱相关性。提出了电位-pH-AE图的概念，并根据AE活性和b值绘制了该图。还讨论了AE源的主要机制，即跨钝性溶解和氢气泡演化。
Acoustic emission (AE) behaviour during the electrochemical corrosion of 304 stainless steel (304SS) in H2SO4solutions was studied. AE signals which related to transpassive dissolution are detected in solutions with low pH, and are very slightly influenced by current density and pre-strain. During hydrogen bubble evolution, a weak correlation exists between the AE signal amplitude and the hydrogen bubble diameter. The concept of potential – pH – AE diagram is proposed and such a diagram is drawn based on AE activity and b-values. The main mechanisms of AE sources which are transpassive dissolution and hydrogen bubble evolution, are also discussed.