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SiCp/Al復(fù)合材料在Cl-作用下初期腐蝕行為
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南京航空航天大學(xué)材料科學(xué)與技術(shù)學(xué)院,南京航空航天大學(xué)材料科學(xué)與技術(shù)學(xué)院,南昌航空大學(xué)材料科學(xué)與工程學(xué)院,南昌航空大學(xué)材料科學(xué)與工程學(xué)院

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TG171

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國家自然科學(xué)基金(51262023)；江西省金屬材料微結(jié)構(gòu)調(diào)控重點(diǎn)實(shí)驗(yàn)室開放基金(JW201323001)；輕合金加工科學(xué)與技術(shù)國防重點(diǎn)學(xué)科實(shí)驗(yàn)室(gf201401007)


Study on the initial corrosion behavior of SiCp/Al composites in Cl- containing solution
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School of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,School of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,School of Material Science and Engineering,Nanchang Hangkong University,Nanchang,School of Material Science and Engineering,Nanchang Hangkong University,Nanchang

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    摘要:

    通過室內(nèi)浸泡模擬實(shí)驗(yàn)方法,采用掃描Kelvin探針技術(shù)研究了SiCp/Al復(fù)合材料在Cl-介質(zhì)下初期腐蝕行為。結(jié)果表明,SiC顆粒與Al基體界面結(jié)合處是復(fù)合材料在Cl-介質(zhì)下初期腐蝕的優(yōu)先發(fā)生位置,Cl-和界面相是促進(jìn)初期腐蝕發(fā)展的主要原因。隨腐蝕的不斷進(jìn)行,復(fù)合材料先形成鈍化膜,表面電位先整體正移,后鈍化膜破損,表面電位整體負(fù)向移動。復(fù)合材料初期腐蝕過程表現(xiàn)為其鈍化膜形成和逐漸破損的腐蝕特征,腐蝕產(chǎn)物主要為Al(OH)3、Al2O3和AlCl3。

    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.

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崔霞,周賢良,歐陽德來,黃芃. SiCp/Al復(fù)合材料在Cl-作用下初期腐蝕行為[J].稀有金屬材料與工程,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.]
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  • 收稿日期:2015-09-17
  • 最后修改日期:2016-05-16
  • 錄用日期:2016-06-12
  • 在線發(fā)布日期: 2016-12-08
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