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崔霞,周贤良,欧阳德来,黄芃.SiCp/Al复合材料在Cl-作用下初期腐蚀行为[J].稀有金属材料与工程(英文),2016,45(11):2884~2888.[CUI Xia,ZHOU Xian-liang,OUYANG De-lai,HUANG Peng.Study on the initial corrosion behavior of SiCp/Al composites in Cl- containing solution[J].Rare Metal Materials and Engineering,2016,45(11):2884~2888.]
Study on the initial corrosion behavior of SiCp/Al composites in Cl- containing solution
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Received:September 17, 2015  Revised:May 16, 2016
DOI:
Key words: initial  corrosion, SKP, SiCp/Al  composites
Foundation item:国家自然科学基金(51262023);江西省金属材料微结构调控重点实验室开放基金(JW201323001);轻合金加工科学与技术国防重点学科实验室(gf201401007)
Author NameAffiliationE-mail
CUI Xia School of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics cuixia2000@163.com 
ZHOU Xian-liang School of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics zhouxianl@vip.sina.com 
OUYANG De-lai School of Material Science and Engineering,Nanchang Hangkong University,Nanchang  
HUANG Peng School of Material Science and Engineering,Nanchang Hangkong University,Nanchang  
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Abstract:
      The initial corrosion behavior of SiCp/Al composites in Cl- containing solution was inverstigated by using immersion test and Scanning Kelvin probe (SKP) technique. The results show that the initial corrosion is preferential to occur at the interface between SiC particles and Al matrix of SiCp/Al composites in Cl- containing solution. Cl- and interfacial phase is responsible for the development of initial corrosion. The passive film formed in the initial stage, while the surface potential of SiCp/Al composites moved positively. When the corrosion process continued, the passive film finally breakdowned, resulting in the negative shift of the surface potential. The main corrosion products are Al(OH)3, Al2O3 and AlCl3.