利用自制的微参比电极定点测量了双相不锈钢中铁素体相与奥氏体相在NaCl水溶液中的腐蚀电位差异, 并建立了微电化学测量系统, 在HNO3和FeCl3混合溶液中对双相不锈钢铁素体和奥氏体相分别进行电化学行为和腐蚀差异性的研究. 实验表明, 铁素体相电位比奥氏体相电位低. 微电化学技术的研究结果能够解释双相不锈钢宏观的优选腐蚀行为, 有利于进一步深化对双相不锈钢的优选腐蚀机理的认识.
The Ag-AgCl micro-reference electrodes were fabricated and used to determine the potentials of ferrite and austenite in duplex stainless steel in NaCl solutions separately. The result shows that ferrite has lower corrosion potential than that of austenite. To determine the corrosion behavior for the single phases accurately and obtain more information about the selective corrosion, a capillary-based micro electrochemical system was established. The electrochemical determinations of ferrite and austenite were performed respectively in solutions containing nitric acid and FeCl3. According to the results, ferrite has more noble corrosion potential and low current density in 1.5 mol/L HNO3 and 1.5 mol/L HNO3 + 0.5 mol/L FeCl3 solutions, thus selective corrosion occurred in austenite phase, while, in 1.5 mol/L HNO3+0.1 mol/L FeCl3 solutions, the potential differences between two phases are not obvious, which result in little selective corrosion.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] | |
| [10] | |
| [11] | |
| [12] | |
| [13] | |
| [14] | |
| [15] | |
| [16] | |
| [17] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%