采用电弧熔炼(CA)和机械合金化(MA)通过热压烧结工艺制备了晶粒尺寸差别较大的Cu-40Ni合金,借助于PARM273A和M5210电化学综合测量仪,利用动电位扫描法和交流阻抗技术对比研究了上述合金在酸性含Cl-介质中的腐蚀电化学性能以及腐蚀机制.结果表明:两种合金的腐蚀电位随时间逐渐稳定,在中性Na2SO4溶液中加入H2SO4和NaCl后,两种合金的自腐蚀电位负移;晶粒细化后,两种合金的自腐蚀电位则正移.两种合金在中性及酸性含Cl-介质中均存在钝化现象,但在酸性含Cl-介质中钝化区间很短,钝化能力较弱.两种合金的交流阻抗谱均由单容抗弧组成,反应由电化学过程控制.晶粒细化后,合金中存在大量晶界,参与腐蚀反应的活性原子数增加,促使MACu-40Ni合金的腐蚀速度高于CACu-40Ni合金.
参考文献
| [1] | 范景莲,黄伯云,张传福,曲选辉,汪登龙.纳米钨合金粉末的制备技术与烧结技术[J].硬质合金,2001(04):225-231. |
| [2] | 李新勇,李树本.纳米半导体研究进展[J].化学进展,1996(03):231. |
| [3] | Lu K .Nanocrystalline metal crystallized from amorphous solid:nanocrystallization,structure and properties[J].MATERIAL SCIENCE AND ENGINEERING,1996,16:161. |
| [4] | Benjamin J S .Dispersion strengthened superalloys by mechanical alloying[J].Metallurgical Transactions,1970,1:2943. |
| [5] | Benjamin J S;Volin T E .The mechanism of mechanical alloying[J].METALLURGICAL TRANSACTIONS,1974,5:1929. |
| [6] | Murphy B R;Courtney T H .Synthesis of Cu-NbC nanocomposites bymechanical alloying[J].Nano-Structured Materials,1994,4:365. |
| [7] | Abe S;Saji S;Hori S .Mechanical alloying of Al-20% Ti mixed powders[J].Journal of the Japan Institute of Metals,1990,54:895. |
| [8] | Zdujic E M;Kobayashi K F;Shingu P H .Mechanical alloying of Al-3% Mo powders[J].Zeitschrift fur Metallkunde,1990,81:380. |
| [9] | Xu J.;Klasse T.;Averback RS.;Herr U. .FORMATION OF SUPERSATURATED SOLID SOLUTIONS IN THE IMMISCIBLE NI-AG SYSTEM BY MECHANICAL ALLOYING[J].Journal of Applied Physics,1996(8 Pt.1):3935-3945. |
| [10] | Hideki Araki Shigeoki;Tsuyoshi Okabe et al.Consolidation of mechanical alloyed Al-10.7%Ti powder at low temperature and high pressure of 2 GPa[J].Materials Transactions-Japan Institute of Metals,1995,36:465. |
| [11] | Hahn H;Logas J;Avverback R S .Sintering characteristics of nanocrystalline TiO2[J].Journal of Materials Research,1990,5:609. |
| [12] | Haugsrud R;Per Kofstad .On the high-temperature oxidation of Cu-rich Cu-Ni alloys[J].Oxidation of Metals,1998,50:189. |
| [13] | Syrett B C;Macdonald D D;Wing S S .Corrosion of copper-nickel alloys in sea water polluted with sulfide and sulfide oxidation products[J].CORROSION,1979,35(04):409. |
| [14] | Milosev I;Metikos-Hukovic M .Passive films on 90Cu-Ni alloy:the mechanism of breakdown in chloride containing solutions[J].Journal of the Electrochemical Society,1991,138(01):61. |
| [15] | Wang G;Gleeson B;Douglass D L .A diffusional analysis of the oxidation of binary multiphase alloys[J].OXIDATION OF METALS,1990,35(03):333. |
| [16] | Hart E W .On the role of dislocation in bulk diffusion[J].Acta Metalluraica,1957,5(05):597. |
| [17] | 曹楚南.腐蚀电化学[M].北京:化学工业出版社,1990:94. |
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%