不同时效态7050铝合金板材腐蚀速率测量

doi:10.11902/1005.4537.2016.025

中国腐蚀与防护学报

2017, Vol. 37

Issue (3): 287-292 DOI: 10.11902/1005.4537.2016.025

本期目录 | 过刊浏览

不同时效态7050铝合金板材腐蚀速率测量

宋丰轩¹(

),赵启忠¹,李飞龙¹,任月路¹,黄奎¹,张新明^1,²

1 广西南南铝加工有限公司南宁 530031
2 中南大学材料科学与工程学院长沙 410083

Effect of Aging Treatment on Corrosion Rate of 7050 Al-alloy Plate

Fengxuan SONG¹(

),Qizhong ZHAO¹,Feilong LI¹,Yuelu REN¹,Kui HUANG¹,Xinming ZHANG^1,²

1 Guangxi Alnan Aluminum Inc., Nanning 530031, China
2 School of Materials Science and Engineering, Central South University, Changsha 410083, China

全文: PDF(2177 KB) HTML

摘要:

采用失重、动电位极化和裂纹扩展速率测试方法,对不同时效态7050铝合金板材的腐蚀速率进行测定,并利用金相显微镜对浸蚀表面和纵截面的腐蚀形貌进行观察。结果表明：随着时效程度的增加,合金腐蚀类型由局部腐蚀逐渐向均匀腐蚀转变,腐蚀速率逐渐增加;而腐蚀裂纹扩展方式由沿晶腐蚀逐渐向穿晶腐蚀转变,导致腐蚀裂纹扩展速率不断减小;峰值时效态合金的腐蚀电流密度最大,欠时效态的次之,过时效态的最小。

关键词 ： 7050铝合金板, 腐蚀速率, 动电位极化, 腐蚀裂纹, 时效

Abstract：

Three groups of the same 7050 Al-alloy plates were all aged firstly at 121 ℃ for 6 h and then aged subsequently at 163 ℃ for 0, 12 and 24 h respectively. The corrosion performance of the aging treated alloy plates was characterized by means of mass loss measurement, potentiodynamic polarization curve measurement and corrosion cracking propagation measurement, as well as optical microscope (OM). The results show that the corrosion type of the aged alloy plates changed from localized corrosion to general corrosion gradually with increasing ageing time and the corrosion rate decreased constantly. Meanwhile, the manner of corrosion cracking propagation for the aged alloys transformed from intergranular to transgranular gradually with the increasing ageing time. This makes the rate of corrosion cracking propagation become lower continuously. The corrosion current density for the different aged alloy plates were assessed by potentiodynamic polarization technique, which may be ranked as the following order: peak-aged state >under-aged state > over-aged state.

Key words： 7050 aluminum alloy plate corrosion rate potentiodynamic polarization corrosion cracking aging

收稿日期: 2016-02-22

基金资助:国家国际科技合作专项 (2014DFA50210)

	服务

	把本文推荐给朋友
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	宋丰轩
	赵启忠
	李飞龙
	任月路
	黄奎
	张新明
44.8K

引用本文:

宋丰轩,赵启忠,李飞龙,任月路,黄奎,张新明. 不同时效态7050铝合金板材腐蚀速率测量[J]. 中国腐蚀与防护学报, 2017, 37(3): 287-292.
Fengxuan SONG, Qizhong ZHAO, Feilong LI, Yuelu REN, Kui HUANG, Xinming ZHANG. Effect of Aging Treatment on Corrosion Rate of 7050 Al-alloy Plate. Journal of Chinese Society for Corrosion and protection, 2017, 37(3): 287-292.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2016.025 或 https://www.jcscp.org/CN/Y2017/V37/I3/287

图1 7050铝合金不同时效态样品失重量和失重速率测量结果

图2 不同时效态7050铝合金样品的极化曲线和腐蚀速率

图3 7050铝合金纵截面最大腐蚀深度和平均腐蚀深度随浸泡时间的变化

图4 7050铝合金在3.5%NaCl溶液中浸泡12 h后的表面和纵截面腐蚀形貌

图5 合金晶界附近电势分布随时效程度的变化示意图 (灰度越高,电势越负)

[1]	Starke Jr E A, Staley J T. Application of modern aluminum alloys to aircraft[J]. Prog. Aerosp. Sci., 1996, 32: 131
[2]	Heinz A, Haszler A, Keidel C, et al.Recent development in aluminium alloys for aerospace applications[J]. Mater. Sci. Eng., 2000, A280: 102
[3]	Cao F H.Electrochemical study on the iocalized corrosion behavior of high strength aircraft aluminum alloys [D]. Hangzhou: Zhejiang University, 2005
[3]	(曹发和. 高强度航空铝合金局部腐蚀的电化学研究 [D]. 杭州: 浙江大学, 2005)
[4]	Zhao F, Lu F Y, Mu N, et al.Relations between microstructure and exfoliation corrosion resistance of 7050 Al-alloy[J]. J. Chin. Soc. Corros. Prot., 2015, 35: 423
[4]	(赵凤, 鲁法云, 穆楠等. 7050铝合金板材晶粒结构与抗剥落腐蚀性能的关系[J]. 中国腐蚀与防护学报, 2015, 35: 423)
[5]	Davis J R.Corrosion of Aluminum and Aluminum Alloys[M]. Materials Park, Ohio: ASM International, 1999
[6]	Ramgopal T, Gouma P I, Frankel G S.Role of grain-boundary precipitates and solute-depleted zone on the intergranular corrosion of aluminum alloy 7150[J]. Corrosion, 2002, 58: 687
[7]	Song F X, Zhang X M, Liu S D, et al.The effect of quench rate and overageing temper on the corrosion behaviour of AA7050[J]. Corros. Sci., 2014, 78: 276
[8]	Cao C N.Corrosion Electrochemistry-Corrosion and Protection [M]. Beijing: Chemical Industry Press, 1994
[8]	(曹楚南. 腐蚀电化学-腐蚀与防护全书 [M]. 北京: 化学工业出版社, 1994)
[9]	Zhang X M, Song F X, Liu S D, et al.Influence of two-step aging on exfoliation corrosion properties of 7050 aluminum alloy plate[J]. J. Central South. Univ.(Sci. Technol.), 2011, 42: 2252
[9]	(张新明, 宋丰轩, 刘胜胆等. 双级时效对7050铝合金板材剥蚀性能的影响[J]. 中南大学学报(自然科学版), 2011, 42: 2252)
[10]	Sun S Q, Zheng Q F, Li D F, et al.Long-term atmospheric corrosion behaviour of aluminium alloys 2024 and 7075 in urban, coastal and industrial environments[J]. Corros. Sci., 2009, 51: 719
[11]	Syed S.Influence of the environment on atmospheric corrosion of aluminium[J]. Corros. Eng. Sci. Technol., 2010, 45: 282
[12]	Xing S B, Li X G, Li L, et al.Corrosion behavior of 7A04 aluminium alloy in xisha marine atmosphere[J]. Corros. Prot., 2013, 34: 796
[12]	(邢士波, 李晓刚, 李丽等. 7A04铝合金在西沙海洋大气中的腐蚀行为[J]. 腐蚀与防护, 2013, 34: 796)
[13]	Liu Y J, Wang Z Y, Ke W.Corrosion behavior of 2024-T3 aluminum alloy in simulated marine atmospheric environment[J]. Chin. J. Nonferrous Met., 2013, 23: 1208
[13]	(刘艳洁, 王振尧, 柯伟. 2024-T3铝合金在模拟海洋大气环境中的腐蚀行为[J]. 中国有色金属学报, 2013, 23: 1208)
[14]	ASM International.ASM Handbook: Volume 4: Heat Treating[M]. 10th Ed. Ohio: ASM International, 1991
[15]	Knight S P, Birbilis N, Muddle B C, et al.Correlations between intergranular stress corrosion cracking, grain-boundary microchemistry, and grain-boundary electrochemistry for Al-Zn-Mg-Cu alloys[J]. Corros. Sci., 2010, 52: 4073
[16]	Perez N.Electrochemistry and Corrosion Science Protection[M]. Boston, US: Springer, 2004

[1]	张浩, 杜楠, 周文杰, 王帅星, 赵晴. 模拟海水溶液中Fe³⁺对不锈钢点蚀的影响[J]. 中国腐蚀与防护学报, 2020, 40(6): 517-522.
[2]	贾世超, 高佳祺, 郭浩, 王超, 陈杨杨, 李旗, 田一梅. 再生水水质因素对铸铁管道的腐蚀研究[J]. 中国腐蚀与防护学报, 2020, 40(6): 569-576.
[3]	武栋才,韩培德. 中温时效处理对SAF2304双相不锈钢耐蚀性的影响[J]. 中国腐蚀与防护学报, 2020, 40(1): 51-56.
[4]	赵国仙,黄静,薛艳. 某油田地面集输管道用材腐蚀行为研究[J]. 中国腐蚀与防护学报, 2019, 39(6): 557-562.
[5]	任建平,宋仁国. 双级时效对7050铝合金力学性能及氢脆敏感性的影响[J]. 中国腐蚀与防护学报, 2019, 39(4): 359-366.
[6]	王霞,任帅飞,张代雄,蒋欢,古月. 豆粕提取物在盐酸中对Q235钢的缓蚀性能[J]. 中国腐蚀与防护学报, 2019, 39(3): 267-273.
[7]	孙永伟,钟玉平,王灵水,范芳雄,陈亚涛. 低合金高强度钢的耐模拟工业大气腐蚀行为研究[J]. 中国腐蚀与防护学报, 2019, 39(3): 274-280.
[8]	刘丽,于思荣. 添加Gd对AM60镁合金耐腐蚀性能的影响[J]. 中国腐蚀与防护学报, 2019, 39(2): 185-191.
[9]	李洋, 李承媛, 陈旭, 杨佳星, 王欣彤, 明男希, 韩镇泽. 超级13Cr不锈钢在海洋油气田环境中腐蚀行为灰关联分析[J]. 中国腐蚀与防护学报, 2018, 38(5): 471-477.
[10]	张志英, 汤迦南, 余杰, 王旭东, 黄罗超, 邹俊文, 唐浩, 张继康, 陈亚涛, 程东鹏. 铜基非晶合金复合材料在NaCl溶液中的腐蚀行为研究[J]. 中国腐蚀与防护学报, 2018, 38(5): 478-486.
[11]	焦明远, 金伟良, 毛江鸿, 李腾, 夏晋. 电化学修复过程混凝土内环境对钢筋表面析氢影响的实验研究[J]. 中国腐蚀与防护学报, 2018, 38(5): 463-470.
[12]	逄旭光, 刘润青, 王文涛, 史艳华, 李飞, 梁平. 时效温度对S32750超级双相不锈钢组织和抗氢氟酸腐蚀性能的影响[J]. 中国腐蚀与防护学报, 2017, 37(6): 519-525.
[13]	朱明,余勇,张慧慧. L245钢在不同温度下的油气田模拟水中的腐蚀行为研究[J]. 中国腐蚀与防护学报, 2017, 37(3): 300-304.
[14]	张子阳,王善林,章恒瑜,柯黎明. AZ31镁合金搅拌摩擦焊接头腐蚀行为[J]. 中国腐蚀与防护学报, 2017, 37(2): 117-125.
[15]	白强,邹妍,孔祥峰,高杨,刘岩,董胜. 奥氏体焊条水下湿法焊接CCSE40钢在海水中的腐蚀电化学行为研究[J]. 中国腐蚀与防护学报, 2016, 36(5): 427-432.

Viewed

Full text

Abstract

Cited

Shared

Discussed