研究静载荷对LY12CZ铝合金在3%NaCl水溶液中点蚀萌生、扩展的影响.当施加载荷时,LY12CZ合金的环状阳极极化曲线中的点蚀电位和保护电位都有一定程度的负移,表明外加载荷增大了点蚀敏感性,缩短了点蚀萌生期.在点蚀扩展阶段,点蚀的深度扩展与腐蚀时间之间符合幂函数的规律,与外加应力之间符合指数函数的关系.
The influence of applied stress on pitting behavior of LY12CZ aluminum alloy in 3% NaCl aqueous solution was investigated.Experimental results showed that breakdown potential and protection potential of LY12CZ in 3%NaCl aqueous solution showed obvious negative shift, which indicated that applied stress enhanced the pitting susceptibility of LY12CZ and reduced pitting initiation time.It was showed during the growth period that the relationship between the pitting depth and corrosion time accorded with power function and the relationship between the pit depth and applied stress accorded with exponential function.
参考文献
| [1] | 古特曼.金属力学化学与腐蚀防护[M].北京:科学出版社,1989. |
| [2] | Bonora P L, Andrei M, Eliezer A. Corrosion behavior of stressed magnesium alloys[J]. Corros. Sci., 2002, 44: 729. |
| [3] | 王政富,李劲.应变幅与应变速率在形变加速腐蚀过程中的作用[J].金属学报,1994,30(5):213. |
| [4] | 王俭秋.腐蚀疲劳过程中形变与电化学交互作用研究[D].沈阳:中国科学院金属腐蚀与防护研究所,1995. |
| [5] | 王景茹,朱立群,饶思贤.A3钢在弹性形变范围内的应变电极行为[J].中国腐蚀与防护学报,2005,25(4):226. |
| [6] | Gutman E M, Solovioff G, Eliezer D. The mechanochem- ical behavior of type 316L stainless steel[J]. Corros. Sci., 1996, 38(7): 1141. |
| [7] | 何建平,樊蔚勋,袁庆铭.慢应变速率下铝合金的腐蚀行为[J].中国腐蚀与防护学报,2003,23(1):17. |
| [8] | Iwanaga H, Oki T. Effect of applied stress on anodic polar- ization behavior and pitting corrosion of stainless steel[J]. J. Soc. Mater. Sci., 1981, 30: 394. |
| [9] | France Jr W D. Effect of stress and plastic deformation on the corrosion of steel[A]. The Fourth International Congress on Metallic Corrosion[C]. The Netherland, 1970. |
| [10] | Saito K, Kuniya J. Mechanichemical model to predict stress corrosion crack growth of stainless steel in high tem- perature water[J]. Corros. Sci., 2001, 43: 1751. |
| [11] | 王景茹,外加应力对若干典型材料自然环境下腐蚀电化学规律的影响的探索研究[D].北京:北京航空航天大学,2005. |
| [12] | Chen G S, Wan K C, Gao M, et al. Transition from pitting to fatigue crack growth-modeling of corrosion fatigue crack nucleation in a 2024-T3 aluminum alloy[J]. Mater. Sci. Eng., 1996, A219: 126. |
| [13] | Burynski Jr R M, Chen G S, Wei R P, et al. Evolution of pitting corrosion in a 2024 T3 aluminum alloy[A]. ASME International Mechanical Engineering Congress on Struc- tural Integrity of Aging Aircraft[C]. New York, 1995. |
| [14] | Godard H P, Jepson W B, Bothwell M R, et al. The Cor- rosion of Light Metals[M]. New York: Wiley, 1967. |
| [15] | Johnson W K. Recent developments in pitting corrosion of aluminum[J]. Br. Corros., 1971, 6(1): 200. |
| [16] | Godard H P. Corrosion behavior of aluminum in natural waters[J]. Can. Chem. Eng., 1960, 38: 167. |
| [17] | 曹楚南.中国材料的自然环境腐蚀[M].北京:化学工业出版社,2005. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%