(1. 東北大學(xué) 材料與冶金學(xué)院, 沈陽 110004;
2. 中國科學(xué)院 金屬研究所, 沈陽 110016;
3. 中國科學(xué)院 金屬腐蝕與防護(hù)國家重點(diǎn)實(shí)驗(yàn)室, 沈陽 110016)
摘 要: 用電化學(xué)方法和浸泡試驗(yàn)研究了SiC顆粒粒度和體積分?jǐn)?shù)對SiCp/2024Al鋁基復(fù)合材料在3.5% NaCl水溶液中耐蝕性的影響，作為比較對2024Al的耐蝕性也進(jìn)行了研究。結(jié)果表明，與基體相比，SiCp/2024Al復(fù)合材料并不增加點(diǎn)蝕敏感性，其抗蝕性與SiC體積分?jǐn)?shù)和粒度有關(guān)，SiC顆粒體積分?jǐn)?shù)低或粒度高的復(fù)合材料，其抗蝕性往往大。
關(guān)鍵字: 鋁基復(fù)合材料； 極化曲線； 電化學(xué)阻抗譜； 耐蝕性
SHI Zhi-ming2，3， BI Jing2， CAI Qing-kui1
（1. School of Materials and Metallurgy， Northeastern University，
Shenyang 110004, P.R.China;
2. Institute of Metal Research， Chinese Academy of Sciences，
Shenyang 110016, P.R.China;
3. State Key Laboratory for Metal Corrosion and Protection，
Chinese Academy of Sciences, Shenyang 110016, P.R.China）
Abstract: The influences of volume fraction and particle size of SiC particulate reinforcements on the corrosion characteristics of SiCp/2024 Al matrix composites in 3.5%NaCl(mass fraction) aqueous solution were investigated with electrochemical method and immersion test; the corrosion resistance of 2024Al was also investigated for comparison. The results show that pitting susceptibility is about the same for the MMCs and their alloy. The corrosion resistance for the MMCs decreases, as the volume fraction increases or particle size reduces.
Key words: aluminum matrix composite; polarization curves; electrochemical impedance spectroscopy; corrosion resistance
