研究了TP304H钢表面电沉积CeO2薄膜在610-770℃水蒸气中的氧化行为的变化.结果表明,沉积CeO2薄膜可有效减缓氧化速度.SEM和EDX分析显示,氧化膜表面形貌由多层结构转化为单层,Cr元素扩散进入CeO2膜层而形成Cr-Ce复合氧化物膜层.表面形成的氧化膜中Cr浓度显著提高,CeO2膜处于外层氧化膜与基体之间,内氧化消失.根据CeO2特性和试验结果,由于CeO2中Ce离子具有处于富氧/贫氧环境中具有Ce4+/Ce3+两价和高氧空位浓度特性,认为沉积CeO2薄膜对氧向内扩散具有一定的阻挡作用,限制了CeO2薄膜/基体界面处的氧分压,使得Cr优先扩散穿过CeO2薄膜在CeO2薄膜/气体界面处氧化,从而推迟了Fe氧化物形成的时间.
参考文献
| [1] | 李辛庚,齐慧滨,王学刚,何家文.火电厂锅炉再热器管高温腐蚀研究[J].材料保护,2003(06):9-11. |
| [2] | Hou P Y;Shui Z R;Chuang G Y;Stringer J .Effect of reactive element oxide coatings on the high temperature oxidation behavior of a FeCrAl alloy[J].Journal of the Electrochemical Society,1992,139(04):1119-1126. |
| [3] | S. Chevalier;C. Nivot;J. P. Larpin .Influence of Reactive Element Oxide Coatings on the High Temperature Oxidation Behavior of Alumina-Forming Alloys[J].Oxidation of Metals,2004(3/4):195-217. |
| [4] | Whittle D P;Stringer J .Improvements in high temperature oxidation resistance by additions of reactive elements or oxide dispersions[J].Philosophical Transactions of the Royal Society of London,1980,295(1413):309-329. |
| [5] | He Y D;Stott F H .The effect of thin surface applied oxide coating films on the selective oxidation of alloys[J].Corrosion Science,1996,38(11):1853-1868. |
| [6] | Fernandes S M C;Ramanathan L V .Rare earth oxide coatings to decrease high temperature degradation of chromia forming alloys[J].Materials Research,2004,7(01):135-139. |
| [7] | Zhitomirsky I;Petric A .Electrophoretic deposition of electrolyte materials for solid oxide fuel cells[J].Journal of Materials Science,1999,40:263-268. |
| [8] | Lu Xinying;Zhu Rizhang;He Yedong .Electrodeposited thin oxide films[J].Surface and Coatings Technology,1996,79:19-24. |
| [9] | 李辛庚,傅敏,何家文.喷丸对TP304H钢高温水蒸气氧化行为的作用[J].材料科学与工艺,2004(03):253-257. |
| [10] | 王磊,马建新,路小峰,宗方.稀土氧化物上SO2和NO的催化还原Ⅰ.催化剂的活化特性和机理[J].催化学报,2000(06):542-546. |
| [11] | Adele Qi Wang;Teresa Diane Golden .Anodic Electrodeposition of Cerium Oxide Thin Films[J].Journal of the Electrochemical Society,2003(9):C616-C620. |
| [12] | Teresa Diane Golden;Adele Qi Wang .Anodic Electrodeposition of Cerium Oxide Thin Films[J].Journal of the Electrochemical Society,2003(9):C621-C624. |
| [13] | Y. He;H. Qi;D. Wang .Synergistic Effects of Surface Micro-Crystallization and Ce Addition on Selective Oxidation of Ni-20Cr Alloy[J].HIGH TEMPERATURE MATERIALS AND PROCESSES,2000(2):71-77. |
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%