易俊兰,吴松林,刘明辉,赵亮亮,宋袁曾,陈洁,宇波.前处理对化学转化处理铝锂合金耐蚀性的影响[J].表面技术,2013,42(1):42-45.
YI Jun-lan,WU Song-lin,LIU Ming-hui,ZHAO Liang-liang,SONG Yuan-zeng,CHEN Jie,YU Bo.Influence of Pretreatment on Corrosion Resistance of Chromate Conversion Coated Aluminum-lithium Alloy[J].Surface Technology,2013,42(1):42-45 |
| 前处理对化学转化处理铝锂合金耐蚀性的影响 |
| Influence of Pretreatment on Corrosion Resistance of Chromate Conversion Coated Aluminum-lithium Alloy |
| 投稿时间：2012-09-25 修订日期：2013-10-20 |
| DOI： |
| 中文关键词: 铝锂合金 前处理 铬酸盐化学转化膜 交流阻抗谱 极化曲线 耐蚀性 |
| 英文关键词:aluminum-lithium alloy pretreatment chromate conversion electrochemical impedance spectroscopy polarization curve corrosion resistance |
| 基金项目: |
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| Author | Institution |
| YI Jun-lan | Shanghai Aircraft Manufacturing Co. , Ltd. , Shanghai 200436 , China |
| WU Song-lin | Shanghai Aircraft Manufacturing Co. , Ltd. , Shanghai 200436 , China |
| LIU Ming-hui | Metal Corrosion and Surface Protection Lab, AVIC Beijing Institute of Aeronautical Materials, Beijing 100095 , China |
| ZHAO Liang-liang | Metal Corrosion and Surface Protection Lab, AVIC Beijing Institute of Aeronautical Materials, Beijing 100095 , China |
| SONG Yuan-zeng | Shanghai Aircraft Manufacturing Co. , Ltd. , Shanghai 200436 , China |
| CHEN Jie | Shanghai Aircraft Manufacturing Co. , Ltd. , Shanghai 200436 , China |
| YU Bo | Metal Corrosion and Surface Protection Lab, AVIC Beijing Institute of Aeronautical Materials, Beijing 100095 , China |
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| 中文摘要: |
| 采用手工脱氧、打磨脱氧、浸渍脱氧三种不同的前处理工艺对新型 2198 铝锂合金进行前处理,之后手工刷涂 Alodine1200 s 化学处理液进行化学转化处理。 通过极化曲线和交流阻抗谱,研究了所得试样在 3 . 5%NaCl 溶液中的腐蚀行为,并结合微观形貌分析,研究了前处理方式对试样耐蚀性的影响。 结果表明:打磨脱氧前处理的试样击穿电位最正,自腐蚀电流密度最低,容抗弧半径最大,阻抗模值最大,低频段阻抗相位角最接近于-90 o ,耐蚀性最好。 |
| 英文摘要: |
| Three pretreatments including manual brushing deoxidizing, sanding deoxidizing and dipping deoxidizing were respectively applied on Al-Li alloy 2198 . Subsequently, Alodine1200 s chromate conversion solution was manually brushed on the samples. The corrosion resistances of the chromate conversion coated samples in 3 . 5 % NaCl solution were studied by polarization curve and electrochemical impedance spectroscopy ( EIS) , and the influence of the pretreatment on corrosion resistances of the samples was analyzed by scanning electron microscopy ( SEM) . The results show that Eb of the sanding deoxidizing sample is the most positive and Jcorrof this sample is the lowest . The radius of capacitive arc in Nyquist plot and the modulus of corrosion resistance in Bode plot arrive at the maximum because of the sanding deoxidizing pretreatment . Under the same condition, the phase angle of corrosion resistance in the low frequency range is most close to-90 o . Therefore, the corrosion resistance of the sanding deoxidizing sample is the best . |
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