| 徐安桃,周慧,李锡栋,魏骏逸,乔渊博.利用基于周期的小波能量谱评价有机涂层防护性能[J].装备环境工程,2018,15(12):109-114. XU An-tao,ZHOU Hui,LI Xi-dong,WEI Jun-yi,QIAO Yuan-bo.Evaluation of Protective Properties of Organic Coatings Using Cycle-based Wavelet Energy Spectroscopy[J].Equipment Environmental Engineering,2018,15(12):109-114. |
| 利用基于周期的小波能量谱评价有机涂层防护性能 |
| Evaluation of Protective Properties of Organic Coatings Using Cycle-based Wavelet Energy Spectroscopy |
| 投稿时间：2018-10-19 修订日期：2018-12-25 |
| DOI：10.7643/ issn.1672-9242.2018.12.020 |
| 中文关键词: 离散小波变换 军绿有机涂层 腐蚀 EDP |
| 英文关键词:discrete wavelet transform military green organic coating corrosion EDP |
| 基金项目: |
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| Author | Institution |
| XU An-tao | a. Delivery Equipment Support Department, Army Military Transpor-tation University, Tianjin 300161, China |
| ZHOU Hui | b. Postgraduate Training Brigade, Fifth Team of Cadets, Army Military Transpor-tation University, Tianjin 300161, China |
| LI Xi-dong | b. Postgraduate Training Brigade, Fifth Team of Cadets, Army Military Transpor-tation University, Tianjin 300161, China |
| WEI Jun-yi | b. Postgraduate Training Brigade, Fifth Team of Cadets, Army Military Transpor-tation University, Tianjin 300161, China |
| QIAO Yuan-bo | b. Postgraduate Training Brigade, Fifth Team of Cadets, Army Military Transpor-tation University, Tianjin 300161, China |
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| 中文摘要: |
| 目的 验证离散小波分解在军用车里有机涂层防护性能评价中的有效性。方法 通过设计并完成多因子综合环境下的循环加速腐蚀试验，测得军绿有机涂层在每个试验周期之后的电化学噪声数据，并应用改进的小波能量分布图谱（EDP）计算方法，联合d1—d8小波细节系数对涂层性能进行评价。结果 d1晶胞标准差从初始状态的2×10?11 A/cm2增长到第6周期的7.98×10?11 A/cm2，最后又下降到2.51×10?11 A/cm2。由EDP分析结果可知，前3周期为军绿有机涂层腐蚀前期，相对能量主要分布在d7、d8晶胞，涂层可以为基底金属提供有效防护；4—7周期为腐蚀中期，噪声电流振动幅度和频率有较大波动，相对能量分布转移至d1、d2晶胞；8、9周期为腐蚀后期，相对能量在d1—d4之间分散开来。结论 基于周期的小波能量谱方法可以明显描述军绿有机涂层腐蚀过程中的变化情况，是一种有效的涂层性能评价方法。 |
| 英文摘要: |
| Objective To verify the effectiveness of discrete wavelet decomposition in the evaluation of organic coating pro-tection performance in military vehicles. Methods The electrochemical noise data of the military green organic coating after each test cycle was measured by designing a multi-factor integrated cyclic accelerated corrosion test. The improved wavelet energy distribution (EDP) calculation method was applied; and the performance of the coating was evaluated by combining the d1—d8 wavelet detail coefficients. Results The d1 unit cell standard deviation increased from 2×10?11 A/cm2 in the initial state to 7.98×10?11 A/cm2 in the sixth cycle, and finally dropped to 2.51×10?11 A/cm2. The results of EDP analysis showed that the first 3 cycles were the pre-corrosion period of the military green organic coating. The relative energy was mainly distributed in the d7, d8 unit cell. The coating could provide effective protection for the base metal. The cycles 4—7 were the middle of corrosion. The amplitude and frequency of the noise current fluctuated greatly. The relative energy distribution shifted to d1, d2 unit cell. Cycles 8 and 9 were late corrosion. And the relative energy was dispersed between d1-d4. Conclusion The cycle-based wavelet energy spectrum method can clearly describe the changes in the corrosion process of the military green organic coating, and is an effective coating performance evaluation method. |
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