采用交变电场脉冲钝化技术表面改性Fe24Mn4Al5Cr反铁磁定膨胀合金.在1.0 mol/L Na2SO4溶液中通过脉冲钝化生长钝化膜,再在1.0 mol/L Na2SO4+0.5 mol/L H2SO4溶液中测定电位衰减曲线,以优化脉冲钝化工艺参数.利用AES和XPS分析优化工艺条件下生长的脉冲钝化膜化学组成、键合状态及其深度分布;利用阳极极化曲线和电化学阻抗谱测试脉冲钝化膜耐腐蚀性能,并与直流620 mV连续钝化15 min生长钝化膜相比较.研究发现,脉冲钝化膜中元素Al和Cr富集,元素Mn贫化,具有保护性的Al2O3和Cr2O3氧化物阻碍层增厚.脉冲钝化膜的阳极极化曲线呈自钝化,自腐蚀电位Ecorr由连续钝化膜的-360 mV增至-100 mV,维钝电流密度ip由2.6 μA/cm2降至0.7 μA/cm2,阳极极化性能与AISI 304不锈钢相当.脉冲钝化膜的EIS与连续钝化膜相比,其容抗弧直径及|Z|值增加,相位角平台变宽,利用等效电路Rs-(Rp//CPE)拟合的脉冲钝化膜电阻Rp由连续钝化膜的14.8 kΩ·cm2增至54.0 kΩ·cm2,计算的有效电容CB则由14.0 μF/cm2降至10.2 μF/cm2.Fe24Mn4Al5Cr反铁磁定膨胀合金脉冲钝化膜的绝缘性提高,耐蚀性改善.
参考文献
| [1] | Shi C X,Zhang Y S.Encycl Mater Sci Eng,1993;3(Suppl.):1719 |
| [2] | Casteletti L C,Lombardi N A,Totten G E,Heck S C,Fernandes F A P.J ASTM Int,2010; 7:102605 |
| [3] | Zhu X M,Zhang Y S.Corrosion,1998; 54:3 |
| [4] | Umino R,Liu X J,Sutou Y,Wang C P,Ohnuma I,Kainuma R,Ishida K.J Phase Equilb Diffus,2006; 27:54 |
| [5] | Gebhardt T,Music D,Kossmann D,Ekholm M,Abrikosov I A,Vitos L,Schneider J M.Acta Mater,2011; 59:3145 |
| [6] | Lee J W,Duh J G,Wang J H.Surf Coat Technol,2003;168:223 |
| [7] | Jaw J H,Cheng W C,Wang C J.Metall Mater Trans,2005; 36A:2289 |
| [8] | Su C W,Lee J W,Wang C S,Chao C G,Liu T F.Surf Coat Technol,2008; 202:1847 |
| [9] | Wang C H,Luo C W,Huang C F,Huang M S,Ou K L,Yu C H.J Alloys Compd,2011; 509:691 |
| [10] | Zhang Y S,Zhu X M,Liu M,Che R X.Appl Surf Sci,2004; 222:89 |
| [11] | Zhu X M,Liu M,Zhang Y S.Corros Eng Sci Technol,2007; 42:22 |
| [12] | Wendt J L,Chin D T.Corros Sci,1985; 25:889 |
| [13] | Wendt J L,Chin D T.Corros Sci,1985; 25:901 |
| [14] | Song G L,Cao C N,Wang Y,Lin H C.J Chin Soc Corros Protect,1991; 11:319(宋光铃,曹楚南,王友,林海潮.中国腐蚀与防护学报,1991;11:319) |
| [15] | Song G L,Cao C N,Lin H C,Xia B J.J Chin Soc Corros Protect,1992; 12:77(宋铃,曹楚南,林海潮,夏邦杰.中国腐蚀与防护学报,1992;12:77) |
| [16] | Mansfeld F,Lin S H,Kwiatkowski L.Corrosion,1994; 50:838 |
| [17] | Zhang J X,Yan L C,Wei Z F,Qiao Y N,Cao C N,Zhang J Q.Acta Metall Sin,2004; 40:404(张俊喜,颜立成,魏增福,乔亦男,曹楚南,张鉴清.金属学报,2004; 40:404) |
| [18] | Taveira L V,Montemor M F,Belo M D C,Ferreira M G,Dick L F P.Corros Sci,2010; 52:2813 |
| [19] | Doff J,Archibong P E,Jones G,Koroleva E V,Skeldon P,Thompson G E.Electrochim Acta,2011; 56:3225 |
| [20] | Liu X L,Xu Y X,Zhang T,Shao Y W,Meng G Z,Wang F H.Corros Sci Prot Technol,2009; 21:188(刘晓兰,徐雅欣,张涛,邵亚薇,孟国哲,王福会.腐蚀科学与防护技术,2009; 21:188) |
| [21] | Liu X L,Zhang T,Shao Y W,Meng G Z,Wang F H.Corros Sci,2009; 51:2685 |
| [22] | Sanz J M,Hofmann S.Surf Interface Anal,1986; 8:147 |
| [23] | Zhu X M,Zhang Y S.Appl Surf Sci,1998; 125:11 |
| [24] | Trompette J L,Massot L.Corros Sci,2012; 57:174 |
| [25] | Li Y C,Yan C W,Duan H P.J Chin Soc Corros Protect,2002; 22:375(李运超,严川伟,段红平.中国腐蚀与防护学报,2002;22:375) |
| [26] | Brug J,van den Eeden ALG,Sluyters-Rehbach M,Sluyters J H.J Electroanal Chem,1984; 176:275 |
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