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中国腐蚀与防护学报  2013, Vol. 33 Issue (4): 298-305    
  研究报告 本期目录 | 过刊浏览 |
AZ91D镁合金电偶腐蚀的研究
徐宏妍 李智勇
中北大学材料科学与工程学院 太原 030051
Galvanic Corrosion of AZ91D Magnesium Alloy
XU Hongyan, LI Zhiyong
School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
全文: PDF(2462 KB)  
摘要: 在自来水和3.5%NaCl溶液中测试了铸造AZ91D镁合金与铝合金、锌合金、Q235碳钢和Cu偶合后的电偶腐蚀行为,研究了腐蚀环境、偶接材料和阴阳极面积比(CAAR)对铸造AZ91D镁合金电偶腐蚀行为的影响。在电偶腐蚀过程中测量溶液的pH值以及电偶腐蚀电流;用失重法计算了铸造AZ91D镁合金的电偶腐蚀速率,利用SEM观察了AZ91D镁合金的腐蚀形貌,并对腐蚀产物进行XRD分析。结果表明,AZ91D镁合金在电偶腐蚀过程中会使溶液的pH值升高,并伴有以Mg(OH)2为主的腐蚀产物的生成;溶液中Cl-的存在会加速AZ91D镁合金的电偶腐蚀速率;低氢过电位金属Q235碳钢和Cu对AZ91D镁合金的电偶腐蚀加速效果明显高于中氢过电位金属铝合金和锌合金,偶接材料的极化性能对AZ91D镁合金的电偶腐蚀速率有较大影响。同时,大的阴阳极面积比会加速AZ91D镁合金的电偶腐蚀速率,且AZ91D镁合金的电偶腐蚀电流随阴阳极面积比的增大而呈线性增长趋势。
关键词 AZ91D镁合金电偶腐蚀偶接材料阴阳极面积比    
Abstract:The galvanic corrosion behaviors of AZ91D magnesium alloy coupled with aluminum alloy, zinc alloy, Q235 carbon steel and copper were investigated in tap water and 3.5%NaCl solution. The effects of corrosion environment, coupled material and cathode to anode area ratio (CAAR) were discussed. During the corrosion process, pH of the electrolyte was measured and the galvanic currents of all couples were recorded. Meanwhile, the corrosion rate of AZ91D magnesium alloy was calculated by mass loss method, the corrosion morphologies of AZ91D were observed by SEM and the corrosion products were analyzed by XRD. The results showed that the pH of the electrolyte increased due to the galvanic corrosion of AZ91D magnesium alloy, the main corrosion product was Mg(OH)2, and the addition of NaCl would accelerated the galvanic corrosion rate of AZ91D magnesium alloy. Coupled materials with low hydrogen overpotential would promote the galvanic corrosion of AZ91D magnesium more seriously than that with middle hydrogen overpotential, the polarization property of coupled materials also had an obvious effect on galvanic corrosion of AZ91D magnesium alloy. Moreover, larger CAAR would result in faster galvanic corrosion, and the galvanic current of AZ91D magnesium alloy increased linearly with the increase of CAAR.
Key wordsAZ91D magnesium alloy    galvanic corrosion    coupled material    cathode to anode area ratio
    
ZTFLH:  TG146.2  

引用本文:

徐宏妍, 李智勇. AZ91D镁合金电偶腐蚀的研究[J]. 中国腐蚀与防护学报, 2013, 33(4): 298-305.
XU Hongyan, LI Zhiyong. Galvanic Corrosion of AZ91D Magnesium Alloy. Journal of Chinese Society for Corrosion and protection, 2013, 33(4): 298-305.

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2013/V33/I4/298

[1] Zeng R C, Chen J, Zhang J. Reach and progress of galvanic corrosion of magnesium alloys [J]. Mater. Rev., 2008, 22(1): 107-109
(曾荣昌, 陈君, 张津. 镁合金电偶腐蚀研究及其进展 [J]. 材料导报,2008, 22(1): 107-109)
[2] Dong C F, Xiao K, Li J Q, et al. Atmospheric corrosion behavior of AM60 magnesium alloy coupled with Cu alloy and Al alloy [J]. Trans. Nonferrous Met. Soc. China, 2005, 15(12): 1938-1944
(董超芳, 肖葵, 李久青等. AM60镁合金与铜合金及铝合金偶接后的大气腐蚀行为 [J]. 中国有色金属学报, 2005, 15(12): 1938-1944)
[3] Xiao K, Dong C F, Li X G, et al. Galvanic corrosion evaluation behavior of AZ91D magnesium alloy studied by scanning Kelvin Probe [J]. Rare Met. Mater. Eng., 2011, 40(9): 1589-1593
(肖葵, 董超芳, 李晓刚等. AZ91D镁合金电偶腐蚀的扫描Kelvin探针研究 [J]. 稀有金属材料与工程, 2011, 40(9): 1589-1593)
[4] Arya C, Vassie P R W. Influence of cathode-to-anode area ratio and separation distance on galvanic corrosion currents of steel in concrete containing chlorides [J]. Cem. Concr. Res., 1995, 25(5): 989-998
[5] Song G L, Johannesson B , Hapugoda S, et al. Galvanic corrosion of magnesium alloy AZ91D in contact with an aluminum alloy, steel and zinc [J]. Corros. Sci., 2004, 46(4): 955-977
[6] Chen Z C, Ge X L, Zeng B. Preparation and performance of Ni-Sn composite coating on AZ91D magnesium alloy [J]. Corros. Sci. Prot. Technol., 2011, 23 (1): 75-77
(陈志超, 戈晓岚, 曾兵. AZ91D镁合金Ni-Sn双层镀膜研究 [J]. 腐蚀科学与防护技术, 2011, 23?(1):?75-77)
[7] Xu Y J, Chen C G, Zhang D F, et al. Study on galvanic corrosion of magnesium alloys coupled with aluminum alloy of monorail train in NaCl solution [J]. Nonferrous Met. (Extra. Metall.), 2011, (9): 28-32
(徐亚娟, 陈昌国, 张丁非等. 单轨列车用铝合金与镁合金在NaCl溶液中的电偶腐蚀行为研究 [J]. 有色金属(冶炼部分), 2011, (9): 28-32)
[8] Zhang Z M, Xu H Y, Wang Q. Corrosion and mechanical properties of hot-extruded AZ31 magnesium alloys [J]. Trans. Nonferrous Met. Soc. China, 2008, 18: s140-s144
[9] Zhang Z M, Xu H Y, Li B C. Corrosion properties of plastically deformed AZ80 magnesium alloy [J]. Trans. Nonferrous Met. Soc. China, 2010, 20: s697-s702
[10] He J Q, Wang Z, Zhang W, et al. Galvanic corrosion for magnesium alloy coupled with dissimilar metallic materials during salt spray and humidity cycle test [J]. Corros. Sci. Prot. Technol., 2004, 16(3): 141-143
(何积铨, 王湛, 张巍等. 模拟大气环境中加速镁合金电偶腐蚀的研究 [J]. 腐蚀科学与防护技术, 2004, 16(3): 141-143)
[11] Tong Z S, Zhang W, Li J Q, et al. Galvanic corrosion behavior of die cast AZ91D magnesium alloy in chloride solution [J]. J. Univ. Sci. Technol. Beijing, 2004, 11(2): 127-132
[12] Sun D B, Li T, Yu H Y, et al. Formation and effect of tribo-cell for Fe-Cr alloy [J]. J. Electrochem., 1998, 4 (3): 307-312
(孙冬柏, 李涛, 俞宏英等. 铁铬合金摩擦破损微电偶的形成及作用 [J]. 电化学, 1998, 4(3): 307-312)
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