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FeCo基大塊非晶合金鹽霧與電化學(xué)腐蝕研究
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南昌航空大學(xué),南昌航空大學(xué),日本佐賀大學(xué),南昌航空大學(xué),南昌航空大學(xué)

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國家自然科學(xué)基金項目（項目號51261021，51264033）；江西省科技落地計劃項目資助（KJLD13056）


Research on salt spray and electrochemical corrosion of FeCo-based bulk amorphous alloys
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Nanchang Hangkong University,Nanchang Hangkong University,Saga University,Nanchang Hangkong University,Nanchang Hangkong University

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    摘要:

    通過電化學(xué)測試方法與中性鹽霧腐蝕實驗研究Fe24 xCo24-xCr15Mo14C15B6Y2 (X=0, 2, 4, 6, 17)塊體非晶合金的耐蝕性。合金在1 mol/L HCl中出現(xiàn)了寬的鈍化區(qū)，其EIS圖譜均由單一容抗弧組成，顯示出良好耐蝕性；結(jié)合極化曲線與交流阻抗結(jié)果分析可得合金耐蝕性隨著Co含量的增加先增大后減小，當(dāng)Co含量為20%時合金耐蝕性最好。利用能譜分析(EDS)與原子力顯微鏡(AFM)對合金的中性鹽霧腐蝕結(jié)果進行分析，可知它們的腐蝕產(chǎn)物主要由鐵和鈷的氧化物以及它們的氯化物組成。同時FeCo基大塊非晶合金腐蝕程度隨著Co含量的變化而變化，其鹽霧腐蝕耐蝕性規(guī)律與電化學(xué)腐蝕耐蝕性規(guī)律一致。

    Abstract:

    The corrosion resistance of Fe24 xCo24-xCr15Mo14C15B6Y2 (X=0, 2, 4, 6, 17) bulk amorphous alloy was investigated by electrochemical test methods and neutral salt spray experiment, respectively. The alloy formed wide passivation zone in 1mol/L HCl, its EIS spectra was composed of a single capacitive loop, which showing a good corrosion resistance. Combined with the results of polarization curves and AC impedance analysis, it can be obtained that the corrosion resistance of the alloy increases first and then decreases with the increasing of Co content. It gets the best corrosion resistance when the Co content of 20%. Using spectroscopy (EDS) and atomic force microscopy (AFM) to analyze the salt spray result, it can be known that the corrosion products mainly composed of iron and cobalt oxides and their chlorides. Meanwhile, FeCo-based bulk amorphous alloy corrosion degree was changed with Co content varied, and its salt spray corrosion resistance rule is consistent with electrochemical corrosion resistance rule.

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陳慶軍,蔣薇,張法碧,董應(yīng)虎,周賢良. FeCo基大塊非晶合金鹽霧與電化學(xué)腐蝕研究[J].稀有金屬材料與工程,2016,45(9):2322~2326.[chen qing jun, jiang wei, zhang fa bi, dong ying hu, zhou xian liang. Research on salt spray and electrochemical corrosion of FeCo-based bulk amorphous alloys[J]. Rare Metal Materials and Engineering,2016,45(9):2322~2326.]
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  • 收稿日期:2014-07-18
  • 最后修改日期:2014-12-11
  • 錄用日期:2015-01-13
  • 在線發(fā)布日期: 2016-10-09
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