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    190406-氧氣對聚苯胺/316L 不銹鋼體系耐腐蝕性能的影響

       作者:姜文印,周婉秋,等    單位:沈陽師范大學化學化工學院    日期:2019-03-01     瀏覽:368    評論:0    
    提示:中文核心期刊,中國科技核心期刊! DOI: 10.19289/j.1004-227x.2019.04.006氧氣對聚苯胺/316L 不銹鋼體系耐腐蝕性能的影響姜文印

    中文核心期刊,中國科技核心期刊!   



    DOI: 10.19289/j.1004-227x.2019.04.006

    氧氣對聚苯胺/316L 不銹鋼體系耐腐蝕性能的影響

    姜文印,周婉秋*,趙玉明,劉曉安,辛士剛,康艷紅(沈陽師范大學化學化工學院,遼寧 沈陽 110034)

    摘要:為了防止不銹鋼雙極板在質子交換膜燃料電池(PEMFC)工作環境下發生腐蝕,在由0.1 mol/L 苯胺單體與0.2 mol/L H2SO4組成的水溶液中采用循環伏安法在316L 不銹鋼(SS)表面電化學合成了導電聚苯胺(PANI)薄膜。采用傅里葉變換紅外光譜(FT-IR)分析了PANI 的化學結構,采用掃描電鏡(SEM)觀察了表面形貌,發現所合成的PANI 具有苯−醌交替的中間氧化態結構,PANI 膜呈現纖維狀形貌特征。采用極化曲線和電化學阻抗譜(EIS)對比研究了在0.2 mol/L H2SO4 中氧氣對PANI/316L SS 和無涂層316L SS 耐腐蝕性能的影響。結果表明,氧氣促進了PANI/316L SS 界面處保護性氧化膜的形成,使PANI/316L SS 體系的耐腐蝕性能提高。

    關鍵詞:質子交換膜燃料電池;雙極板;不銹鋼;聚苯胺;電化學合成;循環伏安法;耐蝕性;氧

    中圖分類號:TQ153.3 

    文獻標志碼:A 

    文章編號:1004 – 227X (2019) 04 – 0166 – 08

    Effect of oxygen gas on corrosion resistance of polyaniline/316L stainless steel system // JIANG Wen-yin,ZHOU Wan-qiu*, ZHAO Yu-ming, LIU Xiao-an, XIN Shi-gang, KANG Yan-hong

    Abstract:In order to prevent stainless steel bipolar plates from corrosion under PEMFC (proton exchange membrane fuel cell) working environment, electrosynthesis was performed on the surface of 316L stainless steel (SS) in an aqueous solution composed of 0.1 mol/L aniline and 0.2 mol/L H2SO4 by cyclic voltammetry. The chemical structure of polyaniline (PANI)was analyzed by Fourier-transform infrared spectroscopy (FT-IR). The surface morphology was observed by scanning electron microscopy (SEM). It was found that the synthesized polyaniline was in an alternating benzene–quinone intermediate oxidation state, and the PANI film showed a fibrous morphology. The effect of oxygen on corrosion resistance of PANI/316L SS and uncoated 316L SS in 0.2 mol/L H2SO4 was studied by polarization curve measurement and electrochemical impedance spectroscopy (EIS). The results showed that oxygen promoted the formation of protective oxide film at the interface of PANI/316L SS, which improved the corrosion resistance of PANI/316L SS system.

    Keywords: proton exchange membrane fuel cell; bipolar plate; stainless steel; polyaniline; electrosynthesis; cyclic voltammetry; corrosion resistance; oxygen

    First-author’s address: College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China

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