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Updated: Jan 13, 2026

Potentiodynamic Corrosion Testing

Potentiodynamic Corrosion Testing

Published on: September 4, 2016

早期腐蚀损伤的评估使用由纵向临界折射 (LCR) 波产生的准静态元件脉冲

Meng Qinghang¹, Gu Bin¹, Yuan Weifeng¹

¹Key Laboratory of Testing Technology for Manufacturing Process, Southwest University of Science and Technology, Mianyang 621010, China.

|January 11, 2026

概括

这项研究引入了一种使用准静态元件脉冲 (QSCP) 检测金属早期腐蚀损伤的新方法. 来自QSCP的声学非线性参数 (ANP) 显示了与腐蚀程度的强烈相关性,提供了一个敏感的非破坏性评估工具.

科学领域:

材料科学材料科学材料科学
非破坏性测试不破坏性测试
声学声学在声学方面

背景情况:

非线性超声波技术对于早期损伤检测是有效的,但其信号噪声比较低.
微损伤信号明显比基本波弱,限制了实际应用.
早期的损伤,包括腐蚀,需要敏感的检测方法来检测结构完整性.

研究的目的:

调查准静态元件脉冲 (QSCP) 用于评估早期腐蚀损伤.
评估使用基于QSCP的声学非线性参数 (ANP) 在7075合金中检测腐蚀的可行性.
为了确定ANP与腐蚀引起的微裂程度之间的相关性.

主要方法:

进行了数值模拟,以建模纵向临界折射 (LCR) 波与腐蚀诱导的微裂纹的相互作用.
实验验证对7075个合金样本在各种腐蚀阶段进行了实验验证.
分析了QSCP信号以计算ANP,将其与微裂密度和腐蚀严重程度相关联.

主要成果:

基于QSCP的ANP与腐蚀诱导的微裂纹的程度之间观察到正相关性.
数字模拟表明,随着微裂数量的增加,ANP的单调增加.
实验结果显示,到第四个腐蚀阶段,ANP显著增加,约为54.8%,验证了模拟结果.

结论:

基于QSCP的ANP方法对于检测早期腐蚀损伤是有效和可行的.
这种方法提供了一种有希望的,高度敏感的,非破坏性的方法,用于评估金属结构中的初始腐蚀.
该研究强调了QSCP分析在推进结构健康监测非线性超声波应用方面的潜力.

关键词:

声学非线性参数腐蚀是一种腐蚀.在 LCR 波浪中,有 LCR 波浪.微裂纹 (microcrack) 是一种微裂纹.准静态元件脉冲脉冲是什么

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