5A06铝镁合金海水腐蚀电化学特性
收稿日期: 2014-08-11
修回日期: 2014-10-28
网络出版日期: 2014-11-29
基金资助
国家自然科学基金 (37689501)
Electrochemical features of corrosion of 5A06 Al-Mg alloy in seawater
Received date: 2014-08-11
Revised date: 2014-10-28
Online published: 2014-11-29
Supported by
National Natural Science Foundation of China (37689501)
对5A06铝镁合金进行海水腐蚀实验,测试腐蚀不同时间后的电化学阻抗谱和极化曲线。结合微观形貌,定性分析阻抗谱和极化曲线的变化规律;进而建立等效电路模型,并采用ZsimpWin拟合给出各等效元件的值,定量分析其变化规律。另一方面,利用极化曲线外延法计算腐蚀不同时间后的自腐蚀电位和自腐蚀电流密度,从而得到瞬时腐蚀速率的变化规律。结果表明:没有经过腐蚀的5A06铝镁合金在海水中的阻抗谱呈现双容抗弧特征;腐蚀1天后,随时间的延长,单一容抗弧呈现出先增大后减小的趋势。在整个腐蚀过程中,自腐蚀电流密度和腐蚀速率先减小后增大;腐蚀1天相对未经腐蚀的样品腐蚀电位(Ecorr)有所升高,随后逐渐下降,最终又呈现上升的趋势。
张艾艾 , 何晶靖 , 刘天娇 , 张卫方 . 5A06铝镁合金海水腐蚀电化学特性[J]. 航空学报, 2015 , 36(9) : 3147 -3154 . DOI: 10.7527/S1000-6893.2014.0305
A corrosion experiment of 5A06 Al-Mg alloy immersed in seawater is conducted. The electrochemical impedance spectra and polarization curves for different periods are tested. Combining the microstructure, analyze the changing of these impendence spectra and polarization curves qualitatively. Three different equivalent circuits are proposed and the values of each equivalence element are fitted using the software of ZsimpWin based on a suitable equivalent circuit. Then the change rules are quantified. At the same time self-corrosion electric potential and self-corrosion electric current density are obtained by extend curve of polarization curves, which reflects the change of the instantaneous corrosion rate. The results show that double capacitive reactance arcs have appeared for a fresh 5A06 Al-Mg alloy. When the alloy is corroded for more than one day, the capacitive reactance arc is increased and then decreased as the immersion time is prolonged. The self-corrosion electric current density and the instantaneous corrosion rate are decreased and then increased. The Ecorr increases when it is corroded for one day, then gradually declines and ultimately presents the rising trend.
[1] Huang L C, Liu H C, Gu A, et al. Corrosion fatigue behavior of 7075 aluminum alloy in saline water environment at different temperatures[J]. Acta Aeronautica et Astronautica Sinica, 2009, 30(6): 1145-1149 (in Chinese). 黄领才, 刘慧丛, 谷岸, 等. 7075铝合金在不同温度盐水环境中的腐蚀疲劳行为[J]. 航空学报, 2009, 30(6): 1145-1149.
[2] Jia B, Gai F F, Ma Z T, et al. Ballistic limit analysis of aluminum 5A06 single wall plate subjected to hypervelocity impact[J]. Materials Science and Technology, 2007, 15(5): 636-639 (in Chinese). 贾斌, 盖芳芳, 马志涛, 等. 5A06 铝合金单层板超高速撞击弹道极限分析[J]. 材料科学与工艺, 2007, 15(5): 636-639.
[3] Lin M S, Pang B J, Gong H P, et al. Damage of 5A06 Whipple shield caused by hypervelocity impact of Al 2017 sphere[J]. Journal of Astronautics, 2009, 30(4): 1686-1692 (in Chinese). 林木森, 庞宝君, 龚海鹏, 等. 球形弹丸超高速正撞击Whipple防护结构损伤分析[J]. 宇航学报, 2009, 30(4): 1686-1692.
[4] Xu F, Li X Y, Yang J, et al. Laser welding process of 5A06 aluminum alloy with filler wire[J]. Welding & Joining, 2008(8): 26-28 (in Chinese). 许飞, 李晓延, 杨璟, 等. 5A06 铝合金激光填丝焊工艺研究[J]. 焊接, 2008(8): 26-28.
[5] Mu Z T, Chen D H, Zhu Z T, et al. Fatigue crack growth behavior of aerospace aluminum alloy LD2 under corrosion[J]. Acta Aeronautica et Astronautica Sinica, 2013, 34(3): 574-579 (in Chinese). 穆志韬, 陈定海, 朱做涛, 等. 腐蚀条件下LD2航空铝合金裂纹扩展规律研究[J]. 航空学报, 2013, 34(3): 574-579.
[6] Liu J Z, Chen B, Ye X B, et al. Fatigue and crack growth behavior of pre-corroded aluminum alloy 2024-T62 and its life prediction based on fracture mechanics[J]. Acta Aeronautica et Astronautica Sinica, 2011, 32(1): 107-116 (in Chinese). 刘建中, 陈勃, 叶序彬, 等. 含腐蚀预损伤铝合金2024-T62的疲劳断裂行为及基于断裂力学的寿命预测[J]. 航空学报, 2011, 32(1): 107-116.
[7] Cui C H, Gao K Y, Nie Z R, et al. Corrosion behavior and microstructure of Er containing 5083 and 5A06 Al-Mg alloys[J]. Corrosion & Protection, 2011, 32(2): 94-98 (in Chinese). 崔昌华, 高坤元, 聂祚仁, 等. 含Er中高Mg含量铝合金热轧板材腐蚀性能及微观结构的研究[J]. 腐蚀与防护, 2011, 32(2): 94-98.
[8] Li J F, Zheng Z Q, Zhang Z, et al. Electrochemical impedance spectroscopy of Al alloys during exfoliation corrosion[J]. Journal of Chinese Society for Corrosion and Protection, 2005, 5(1): 48-52 (in Chinese). 李劲风, 郑子樵, 张昭, 等. 铝合金剥蚀过程的电化学阻抗谱分析[J]. 中国腐蚀与防腐学报, 2005, 5(1): 48-52.
[9] Aziz I, Zhang Q, Xiang M. Corrosion inhibition of SiCp/5A06 aluminum metal matrix composite by cerium conversion treatment[J]. Chinese Journal of Aeronautics, 2009, 22(6): 670-676.
[10] Aziz I, Zhang Q, Xiang M. Using EIS to evaluate anti-corrosion properties of the SiCp/5A06 aluminium MMC treated by cerium conversion coatings[J]. Journal of Rare Earths, 2010, 28(1): 109-116.
[11] Conde A, de Damborenea J. Electrochemical modeling of exfoliation corrosion behavior of 8090 alloy[J]. Electrochimica Acta, 1998, 43(8): 849-860.
[12] Conde A, de Damborenea J. Evaluation of exfoliation susceptibility by means of the electrochemical spectroscopy[J]. Corrosion Science, 2000, 42(8): 1363-1377.
[13] Rowland H T, Dexter S C. Effects of the sea water carbon dioxide system on the corrosion of aluminum[J]. Corrosion, 1980, 36(9): 458-467.
[14] Lin L Y, Zhao Y H. Severe corrosivity and its eletrochemical mechanism of seawater in Xiamen sea area to Al-Mg alloys[J]. Electrochemistry, 2003, 9(3): 299-303 (in Chinese). 林乐耘, 赵月红. 厦门海域海水对铝镁合金腐蚀的苛刻性及其电化学机理[J]. 电化学, 2003, 9(3): 299-303.
[15] Lin L Y, Zhao Y H, Cui D W, et al. The corrosion behavior of aluminium magnesium alloy is influenced by "electrolyte effect" of water system[C]//Proceedings of Corrosion Resistant Metal Materials of the 10th Academic Conference. Xian: Chinese Society for Corrosion and Protection, 2007: 115-119 (in Chinese). 林乐耘, 赵月红, 崔大为, 等. 铝镁合金的腐蚀行为受水系统"电解质效应"的影响规律[C]//耐蚀金属材料第十届学术年会论文集. 西安: 中国腐蚀与防护学会, 2007: 115-119.
[16] Jia Z, Dai C S, Chen L. Electrochemical measurement methods[M]. Beijing: Chemical Industry Press, 2006: 14-178 (in Chinese). 贾铮, 戴长松, 陈玲. 电化学测量方法[M]. 北京: 化学工业出版社, 2006: 14-178.
[17] Li J F, Zhang Z, Cheng Y L, et al. Electrochemical features of the corrosion of an aluminum-lithium alloy in 3.0% NaCl solution[J]. Acta Metallurgica Sinica, 2002, 38(7): 760-764 (in Chinese). 李劲风, 张昭, 程英亮, 等, NaCl溶液中Al-Li合金腐蚀过程的电化学特征[J]. 金属学报, 2002, 38(7): 760-764.
[18] Zhou H R, Li X G, Dong C F, et al. Corrosion of aluminum alloy 7A04 under thin electrolyte layers[J]. Journal of University of Science and Technology Beijing, 2008, 30(8): 880-887 (in Chinese). 周和荣, 李晓刚, 董超芳, 等. 7A04 铝合金在薄液膜下腐蚀行为[J]. 北京科技大学学报, 2008, 30(8): 880-887.
[19] Xia C L, Wu T, Liu H N, et al. The measurement for polarization curve of iron and research of application experiments[J]. Chemical of University, 2003, 18(5): 38-41 (in Chinese). 夏春兰, 吴田, 刘海宁, 等. 铁极化曲线的测定及应用实验研究[J]. 大学化学, 2003, 18(5): 38-41.
[20] Li J F, Zheng Z Q. Function mechanism of secondary phase on localized corrosion of Al alloy[J]. Materials Review, 2005, 19(2): 81-83 (in Chinese). 李劲风, 郑子樵. 第二相在铝合金局部腐蚀中的作用机制[J]. 材料导报, 2005, 19(2): 81-83.
[21] Chen X F, Lin L G, Mu Z J, et al. The mechanic of LF6M Al-Mg alloy alclad bubbling[C]//Proceedings of International Conference on Corrosion and Protection of Water Environment. Zhangjiajie: Chinese Society for Corrosion and Protection, 2010: 29-36 (in Chinese). 陈翔峰, 林乐耕, 穆振军, 等. LF6M铝镁合金发生包铝鼓泡的机理研究[C]//水环境腐蚀与防护学术研讨会论文集. 张家界: 中国腐蚀与防护学会, 2010: 29-36.
[22] An B G, Zhang X Y, Han E H. The effect of salt species during the precipitation in the atmosphere on the corrosion of LY12CZ alloy[C]//15th International Corrosion Congress. Granda, Spain, 2002.
[23] Huang G Q. Study of the corrosion potential of metals in seawater[J]. Corrosion & Protection, 2000, 21(1): 8-11 (in Chinese). 黄桂桥. 金属在海水中的腐蚀电位研究[J]. 腐蚀与防护, 2000, 21(1): 8-11.
[24] Burleigh T D, Smith A T. A simple impedance spectra method to measure the thickness of nonporous anodic oxides on aluminum[J]. Journal of the Electrochemical Society, 1991, 138(8): 34-35
[25] Shao L. Corrosion behavior and impressde current cathodic protection of aluminum alloy in 3.5%NaCl sodioum chloride solution[D]. Harbin: Harbin Engineering University, 2012 (in Chinese). 邵麟. 铝合金在3.5%NaCl溶液中的腐蚀行为研究及外加阴极电流保护[D]. 哈尔滨: 哈尔滨工程大学, 2012.
/
| 〈 |
|
〉 |
CJA