| 高蒙,孙志华,刘明,闫巍,汤智慧.固体颗粒沉积对7B04 铝合金初期大气腐蚀行为的影响[J].装备环境工程,2016,13(5):160-165. 高蒙,孙志华,刘明,闫巍,汤智慧.The Influence of Deposition of Solid Particles on the Initial Atmospheric Corrosion of7B04 Aluminum Alloy[J].Equipment Environmental Engineering,2016,13(5):160-165. |
| 固体颗粒沉积对7B04 铝合金初期大气腐蚀行为的影响 |
| The Influence of Deposition of Solid Particles on the Initial Atmospheric Corrosion of7B04 Aluminum Alloy |
| 投稿时间：2016-07-27 修订日期：2016-09-05 |
| DOI：10.7643/ issn.1672-9242.2016.05.026 |
| 中文关键词: 大气腐蚀 固体颗粒 Kelvin探针 |
| 英文关键词:atmospheric corrosion solid particles Kelvin probe |
| 基金项目:国防科技工业技术基础科研项目(JSJC2013205C605) |
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| 中文摘要: |
| 目的 研究NaCl、C、SiO2三种固体颗粒对7B04铝合金初期大气腐蚀行为的影响 方法 通过对三种固体颗粒沉积试样进行户内暴露试验,结合增重测试、腐蚀形貌观察、微区电化学测试等手段研究7B04铝合金在不同固体颗粒沉积下的初期腐蚀行为。结果 经过不同周期暴露试验后,NaCl与SiO2颗粒沉积7B04铝合金在腐蚀初期即有点蚀萌生,且腐蚀增重随暴露时间呈上升趋势；C颗粒沉积7B04铝合金在暴露后期出现少量点蚀,无明显腐蚀增重；三种颗粒沉积后7B04铝合金表面电位呈不均匀分布,并随暴露时间的增加,电位分布发生了变化 结论 在25℃,95%RH条件下,NaCl与SiO2颗粒沉积均可诱发7B04铝合金的大气腐蚀,而C颗粒沉积则无诱发作用。 |
| 英文摘要: |
| Objective To study the effect of deposition of NaCl, C and SiO2 on the initial atmospheric corrosion of 7B04 aluminum alloy. Methods Indoor accelerated testing of 7B04 with the deposition of three particles were carried out. weighting of corrosion products, corrosion morphology observe and electrochemistry testing were used to study the initial corrosion behavior on 7B04 aluminum alloy. Results After different exposure time, pitting were formed on 7B04 aluminum alloy with the deposition of NaCl and SiO2, which results in the increasing of weight gain; a smart amount pittings were found on 7B04 with deposition of C during the late of exposure, without much obvious weight gain; the potential distribution of 7B04 aluminum alloy with deposition of three different particles were asymmetrical, and changed with exposure time. Conclusion At 25℃ with relative humidity of 95%, the deposition of NaCl and SiO2 may accelerate atmospheric corrosion of 7B04 aluminum alloy, but C had a contrary results. |
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