运用Mott-Schottky图可分析混凝土中钢筋钝化膜的半导体特性.对饱和氢氧化钙溶液中和混凝土中钢筋钝化膜的测定表明,在-0.8 V～0.3 V范围,混凝土中钢筋钝化膜的C-2 SC-E呈Mott-Schottky线性关系,且斜率为正,即钢筋钝化膜为n-型半导体,施主密度为1026m-3数量级.在本实验条件下,在模拟孔隙液中添加氯离子,钝化膜破坏严重;而硫酸根离子对钢筋钝化膜无明显影响;亚硝酸根离子能缓解和修补氯离子对钢筋钝化膜的破坏.
参考文献
| [1] | R S莫里森著.吴辉煌译.半导体与金属氧化膜的电化学[M].北京:科学出版社,1988.128. |
| [2] | Ramirez C W,Borgard B,Jones D,et al.Laboratory simulation of corrosion reinforced concrete [J].Material Performance,1990(11) :33. |
| [3] | J H Kennedy,K W Frese,Jr.Flatband potentials and donor densities of polycrystalline α - Fe2O3 determined from Mott Schottky plots[J] .J.Electrochem.Soc.,1978,125(5) :723. |
| [4] | A M Sukhotin,M S Grilikhes,E V Lisovaya.The influence of passivation on the kinetics of the dissolution of iron - I.Outer layer of the passivating film as a heavy dopedthin semiconductor and Mort - Schottky equation [J].Electrochimica Acta,1989,34(2):109. |
| [5] | Ge Honghua,Zhou Guoding,Wu Wenquan.Passivation model of 316 stainless steel in simulated cooling water and the effect of sulfide on the passive film [J].Applied Surface Science,2003,211(4) :321. |
| [6] | Cheng Y F,Yang C,Luo J L.Determination of the diffusivity of point defects in passive films on carbon steel[J].Thin Solid Films,2002,416(9):169. |
| [7] | Cheng Y F,Luo J L.Electronic structure and pitting suscepti bility of passive film on carbon steel[J].Electrochimica Acta,1999,44(4) :2947. |
| [8] | N E Hakiki,M Da Cunha Belo,A M P Simoes,et al.Semicon ducting properties of passive films formed on stainless steels[J].J Electrochem Soc,1998,145(11) :3821. |
| [9] | Berke N S,Sundberg K M.The Effects of Admixtures and Concrete Mix Designs on Long - term Concrete Durability in Chloride Environments[C].Corrosion/89,National Association of Corrosion Engineers,1989,No.386 |
| [10] | Michael J Kane.Corrosion Mechanisms of Steel Reinforcement in Concrete,Dissertation of Ph.D,University of Phode Island,1996. |
| [11] | Akolzin A P,Ghosh P,Kharitonov Yu.Ya,Application and Peculiarity of Ca(OH)2 as inhibitor in presence of corrosion activators[J].British Corrosion Journal,1985(20):32. |
| [12] | 汪鹰,史苑乡,储宝明.用XPS研究钢筋钝化膜和Cl-对钝化膜的影响[J].中国腐蚀与防护学报,1998,18(2):107. |
| [13] | M H Dean and U Stimming.Capacity of semiconductor electrodes with multiple bulk electronic states [J].J Electroanal Chem,1987,228:135. |
| [14] | 刘晓敏,史志明,许刚,等.硫酸盐和温度对钢筋腐蚀行为的影响[J].中国腐蚀与防护学报,1999,19(1):55. |
| [15] | 洪定海.混凝土中钢筋的腐蚀与保护[M].北京:中国铁道出版社,1998.26. |
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