Corrosion Behavior of Aluminum Cold Plate in Ethylene Glycol Coolant
摘 要
监测了冷板系统模拟装置冷却液的pH和铝离子含量,分析了冷板的腐蚀形貌和腐蚀产物,研究了6063铝合金冷板在乙二醇冷却液中的腐蚀行为及导电氧化处理对6063铝合金(6063-CCO)冷板腐蚀行为的影响。结果表明:在试验时间内,冷却液的pH增大,其中试验初期增加明显,后增加缓慢,趋于稳定;铝合金基体金属腐蚀产生的铝离子进入溶液和形成沉淀之间会形成动态平衡;铝制冷板在乙二醇冷却液中的腐蚀以点蚀为主,其腐蚀速率随试验时间的增加而减小,其中试验初期,6063-CCO冷板的腐蚀速率更低,但试验后期,其腐蚀速率却更大。
Abstract
In a simulated cooling system, the pH value and aluminum ion concentration of the coolant were monitored, and the corrosion morphology and corrosion products of the cold plate were analyzed, the corrosion behavior of cold plate made by 6063 aluminum alloy in ethylene glycol coolant and the effect of chemical conductive oxidation on the corrosion of 6063 aluminum alloy cold plate were investigated. As a result, the coolant pH value increased during the experiment period, but increased significantly at the early stage, then increased slowly and tended to be stable. Aluminum ions produced by the aluminum matrix corrosion reached a dynamic balance between solubility and precipitation. Moreover, pitting corrosion was the main corrosion form of aluminum cold plate in ethylene glycol coolant, and the corrosion rate decreased with the increase of experiment time, while the corrosion rate of 6063-CCO (chemically oxidated 6063 aluminum alloy) cold plate was lower at the beginning of the experiment, and higher at the later experiment period.
中图分类号 TG174 DOI 10.11973/fsyfh-201711011
所属栏目 试验研究
基金项目
收稿日期 2016/1/30
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联系人作者郑兴文(zxwasd@126.com)
引用该论文: HU Guogao,YANG Jun,ZHENG Xingwen. Corrosion Behavior of Aluminum Cold Plate in Ethylene Glycol Coolant[J]. Corrosion & Protection, 2017, 38(11): 871
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参考文献
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【2】陈朝轶,杨京,李军旗,等. 模拟海洋大气环境下Cl-质量分数对3003铝合金腐蚀行为的影响[J]. 表面技术,2015,44(3):116-121.
【3】文邦伟,李继红. 铝及铝合金在热带海洋地区大气腐蚀[J]. 表面技术,2004,33(6):21-23.
【4】吕洪涛. 电子设备散热技术探讨[J]. 电子机械工程,2011,27(5):8-11.
【5】LIU Y,CHENG Y F. Characterization of passivity and pitting corrosion of 3003 aluminum alloy in ethylene glycol-water solutions[J]. J Appl Electrochem,2011,41:151-159.
【6】ABIOLA O K,OTAIGBE J O E. Effect of common water contaminants on the corrosion of aluminium alloys in ethylene glycol-water solution[J]. Corrosion Science,2008,50:242-247.
【7】金星,饶楚仪,高立新,等. 铝合金在乙二醇-水模拟冷却液中的腐蚀行为[J]. 材料保护,2011,44(9):15-17.
【8】NATESAN M,VENKATACHARI G,PALANISWAMY N. Kinetics of atmospheric corrosion of mild steel,zinc,galvanized iron and aluminium at 10 exposure stations in India[J]. Corrosion Science,2006,48:3584-3608.
【9】邢士波,李晓刚,李丽,等. 7A04铝合金在西沙海洋大气中的腐蚀行为[J]. 腐蚀与防护,2013,34(9):796-799.
【10】李晨钰,朱立群,刘慧丛,等. 温度对2A12铝合金在模拟油箱积水环境中初期腐蚀行为的影响[J]. 航空学报,2013,34(6):1493-1500.
【11】HODGMAN C D. CRC handbook of chemistry and physics[M]. Boca Raton,FL:CRC Press,1962.
【12】SPEIGHT J G. Lange's handbook of chemistry[M]. New York:McGraw-Hill,2005.
【13】LIN N,CHENG Y F. Electrochemical characterization of metastable pitting of 3003 aluminum alloy in ethylene glycol-water solution[J]. J Mater Sci,2007,42:8613-8617.
【14】ZHANG G A,XU L Y,CHENG Y F. Mechanistic aspects of electrochemical corrosion of aluminum alloy in ethylene glycol-water solution[J]. Electrochimica Acta,2008,5:8245-8252.
【15】LUNDER O,WALMSLEY J C,MACK P,et al. Formation and characterisation of a chromate conversion coating on AA6060 aluminium[J]. Corrosion Science,2005,47:1604-1624.
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