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:
作者单位
易俊兰 上海飞机制造有限公司, 上海 200436 
吴松林 上海飞机制造有限公司, 上海 200436 
刘明辉 中航工业北京航空材料研究院 金属腐蚀与防护研究室, 北京 100095 
赵亮亮 中航工业北京航空材料研究院 金属腐蚀与防护研究室, 北京 100095 
宋袁曾 上海飞机制造有限公司, 上海 200436 
陈洁 上海飞机制造有限公司, 上海 200436 
宇波 中航工业北京航空材料研究院 金属腐蚀与防护研究室, 北京 100095 
AuthorInstitution
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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