通过动电位极化曲线,电化学阻抗谱以及Mott-Schottky曲线的测试,研究了预钝化电位对模拟混凝土孔溶液中钢筋的钝化作用及氯离子对钢筋钝性的影响.结果表日月,在室温下相对于饱和甘汞电极电位为-0.200-0.200 V范围于不同电位分别预钝化4800 s后,钢筋表面均处于钝态;钝化膜内浅层施主浓度随预钝化电位的升高而减少,深层施主浓度则增加;预钝化电位为0.200 V时,钢筋钝化膜的电荷转移电阻最大;预钝化后的钢筋在含氯离子0.01-0.08 mol/L,pH值为1250的模拟混凝土孔溶液中浸泡24 h后,其表面钝化膜表现为高掺杂的n型半导体,在015-0.47 V电位区间内表现为一种类型的施主浓度,施主浓度随氯离子浓度的升高而减小.
参考文献
| [1] | Kumar V.Corros Rev,1988; 16:317 |
| [2] | Koleva D A,de Wit J H W,van Breugel K,Lodhi g F,Ye G.J Electrochem Soc,2007; 154:C261 |
| [3] | Du R G,Hu R G,Huang R S,Lin C J.Anal Chem,2006; 78:3179 |
| [4] | Sénchez M,Gregori J,Alonso M C,Garcia-Jareno J J,Vicente F.Electrochim Acta,2006; 52:47 |
| [5] | Hamadou L,Kadri A Benbrahim N.Appl Surf Sci,2005; 252:1510 |
| [6] | Alves Valéria A,Brett Christopher M A.Electrochim Acta,2002; 47:2081 |
| [7] | Cheng Y F,Luo J L.Electrochirn Acta,1999; 44:2947 |
| [8] | Cheng Y F,Luo J L.Electrochirn Acta,1999; 44:4795 |
| [9] | Sosa E,Cabrera-Sierra R,Oropeza M T,Oropeza M T,Hernández F,Casillas N,Tremont R,Cabrera C,González I.Electrochirn Acta,2003; 48:1665 |
| [10] | Deng H H,Nanjo H,Qian P,Santosa A,Ishikawa I,Kurata Y.Electrochirn Acta,2007; 52:4272 |
| [11] | Kitowski C J,Wheat H G.Corrosion,1997; 53:216 |
| [12] | Sagoés A A,Kranc S C,Moreno E I.Corros Sci,1995; 37:1097 |
| [13] | Gomes W P,Vanmaekelbergh D.Electrochim Acta,1996; 41:967 |
| [14] | Zeng Y M,Luo J L.Electrochim Acta,2003; 48:3551 |
| [15] | Davenport A J,Sansone M.J Electrochem Soc,1995; 142:725 |
| [16] | Kruger J,Long G G,In:McCafferty E,Brodd R J,eds.,Surfaces,Inhibition and Passivation,Pennington,NJ:The Electrochemical Society,1986:210 |
| [17] | Sikora Elzbieta Macdonald,Digby D.J Electrochem Soc,2000; 147:4087 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%