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硅溶膠封孔對(duì)AZ31鎂合金陽(yáng)極氧化膜腐蝕性能的影響
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哈爾濱工程大學(xué)

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TG174.4

基金項(xiàng)目:

國(guó)家青年科學(xué)基金(51305090);哈爾濱市青年科技創(chuàng)新人才基金(2013RFQXJ140); 黑龍江省青年基金(QC2012C068); Fundamental Research Funds for the Central University(HEUCF2013091006)


The effect of SiO2 sol sealing on corrosion resistance of anodic films on AZ31 Mg alloy
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Harbin Engineering University

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    摘要:

    本文采用硅溶膠對(duì)AZ31鎂合金陽(yáng)極氧化膜進(jìn)行封孔處理。論文分別討論了浸漬時(shí)間、焙燒溫度及浸漬次數(shù)三個(gè)實(shí)驗(yàn)參數(shù)。采用掃描電子顯微鏡（SEM）來(lái)分析復(fù)合膜的表面形貌，利用動(dòng)電位極化曲線表征膜的腐蝕性能。采用能譜（EDS）和X射線光電子能譜來(lái)表征封孔后膜的表面組成。實(shí)驗(yàn)結(jié)果表明，硅溶膠封孔可提高陽(yáng)極氧化膜的腐蝕性能；浸漬時(shí)間為1.5min，焙燒溫度為350℃時(shí)，膜的耐腐蝕性能最佳；浸漬-焙燒次數(shù)對(duì)膜的性能影響也較大，浸漬焙燒為7次時(shí)，膜的耐腐蝕性能較好。封孔后，硅溶膠吸附于陽(yáng)極氧化膜的孔外與孔內(nèi)。

    Abstract:

    In this paper, silica sol was used to seal the hole of anodic oxide film on AZ31 magnesium alloy. The immersion time, calcinating temperature and immersion times were discussed respectively. Scanning electron microscope (SEM) was employed to characterize the surface morphology of the composite film and potentiodynamic polarization curves were used to analyze the corrosion behaviors. The composition of the anodic films that sealed was studied by energy dispersion spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). It has been found that the corrosion resistance of anodic film was improved with sealing by silica sol. When the dipping time is 1.5 min and the calcination temperature is 350 ℃, the corrosion resistance of the film is the best. Times of dipping and calcination has bigger influential on the performance of the film, when the dipping- calcination was 7 times, the film has good corrosion resistance. After sealing, silica sol was adsorbed on inner hole and outside hole of the anodic oxidation film.

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董國(guó)君,馬福秋,王桂香.硅溶膠封孔對(duì)AZ31鎂合金陽(yáng)極氧化膜腐蝕性能的影響[J].稀有金屬材料與工程,2016,45(1):66~70.[Dong Guojun, Ma Fuqiu, Wang Guixiang. The effect of SiO2 sol sealing on corrosion resistance of anodic films on AZ31 Mg alloy[J]. Rare Metal Materials and Engineering,2016,45(1):66~70.]
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  • 收稿日期:2013-12-26
  • 最后修改日期:2014-02-25
  • 錄用日期:2014-04-03
  • 在線發(fā)布日期: 2019-01-04
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