申媛媛,董耀华,李庆宏,朱红玲,董丽华,尹衍升.铝合金在切削乳化液中的微生物腐蚀行为研究[J].表面技术,2021,50(4):275-284.
SHEN Yuan-yuan,DONG Yao-hua,LI Qing-hong,ZHU Hong-ling,DONG Li-hua,YIN Yan-sheng.Effect of Microorganisms in Cutting Emulsion on Corrosion Behavior of Aluminum Alloy[J].Surface Technology,2021,50(4):275-284 |
| 铝合金在切削乳化液中的微生物腐蚀行为研究 |
| Effect of Microorganisms in Cutting Emulsion on Corrosion Behavior of Aluminum Alloy |
| 投稿时间：2020-02-24 修订日期：2021-02-25 |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.04.028 |
| 中文关键词: 切削乳化液 微生物 铝合金 电化学阻抗谱 加速腐蚀 |
| 英文关键词:cutting emulsion microorganisms aluminum alloy EIS accelerated corrosion |
| 基金项目:国家自然科学基金项目(51609133) |
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| Author | Institution |
| SHEN Yuan-yuan | College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China |
| DONG Yao-hua | College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China |
| LI Qing-hong | College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China |
| ZHU Hong-ling | College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China |
| DONG Li-hua | College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China |
| YIN Yan-sheng | College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China |
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| 中文摘要: |
| 目的 研究切削乳化液中滋生的微生物对铝合金工件腐蚀行为的影响及腐蚀作用规律，为避免微生物引起铝合金工件的腐蚀提供理论依据。方法 采用表面形貌观察及成分分析方法，分别研究微生物对铝合金腐蚀形貌的影响及腐蚀产物组成，并利用统计学方法分析铝合金表面的点蚀分布情况，最后利用电化学方法分析铝合金表面的腐蚀电化学特性。结果 在含有多种微生物的切削乳化液中，铝合金工件的腐蚀更为严重，铝合金表面被微生物附着，形成不均匀的腐蚀产物膜和生物膜。除去表面膜层后，发现了明显的点蚀坑，而且点蚀坑的数量多、深度大，最深达到17.7 μm。而在灭菌的切削乳化液中，铝合金表面仅有乳化物附着，而且较为均匀。除去膜层后，表面划痕明显，无点蚀现象。电化学结果也表明，在含有多种微生物的切削乳化液中，铝合金的电荷转移电阻Rct逐渐减小，从浸泡3 d时的23 kΩ降到15 d后的8.3 kΩ，铝合金的腐蚀速率明显增大。结论 切削乳化液中滋生的微生物明显加速了铝合金的腐蚀。 |
| 英文摘要: |
| The work aims to provide theoretical basis for avoiding corrosion of aluminum alloy workpieces during cutting process by studying the effect of microorganisms breed in cutting emulsion on the corrosion behavior and corrosion laws of aluminum alloy. Surface morphology observation and composition analysis methods are used to study the effect of microorganisms on the corrosion morphology of aluminum alloy and the composition of corrosion product, respectively. The distribution of pitting corrosion on the surface of aluminum alloy is analyzed by statistical method. Finally, the electrochemical characteristics of aluminum alloy surface are analyzed by electrochemical method. In the cutting emulsion containing microorganisms, the corrosion of aluminum alloy workpieces is more serious. The surface of the aluminum alloy is attached by microorganisms, forming uneven corrosion product films and biofilms. After removing the film, obvious pitting pits are found, and the number and depth of pitting pits are large, with the deepest reaching 17.7 μm. However, in the sterilized cutting emulsion, only the emulsion is attached to the surface of the aluminum alloy, which is relatively uniform. After removing the film layer, the surface scratches is obvious and no pitting. The electrochemical results also showed that in the cutting emulsion containing multiple microorganisms, the charge transfer resistance Rct of the aluminum alloy decreased gradually from 23 kΩ when immersed for 3 days to 8.3 kΩ after being immersed for 15 days, indicating that the corrosion rate of aluminum alloy significantly increase with time. The growth of microorganisms in the cutting emulsion significantly accelerate the corrosion of the aluminum alloy. |
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