工程科学学报，第40卷，第7期：833-841,2018年7月 Chinese Journal of Engineering,Vol.40,No.7:833-841,July 2018 DOI:10.13374/j.issn2095-9389.2018.07.009;http://journals.ustb.edu.cn 工业海洋大气环境下阳极氧化6061铝合金的电偶腐 蚀行为 王沙沙)，杨浪)，肖葵12)，黄运华12)区，李晓刚12) 1)北京科技大学腐蚀与防护中心，北京1000832)腐蚀与防护教育部重点实验室，北京100083 区通信作者，E-mail:huangyh@mater.usth.edu.cm 摘要在青岛典型的工业海洋大气环境下，进行硼硫酸阳极氧化6061铝合金与不同表面状态的30 CrMnSiNi2A结构钢偶接 件的户外大气暴露试验，通过电化学测试、腐蚀产物分析、力学性能检测，断口分析等，研究了偶接件中阳极氧化6061铝合金 的腐蚀规律与机理.结果表明：经1户外大气暴露试验后，与镀镉钛结构钢偶接的6061阳极氧化铝合金力学性能最优，其强 度σ，和延伸率δ分别比原始试样下降6.45%和4.39%，远优于与结构钢裸材偶接的阳极氧化6061铝合金试样（分别下降 10%和62.28%)，略优于未偶接试样（分别下降6.77%和10.74%）.沿晶腐蚀和表面点蚀是导致阳极氧化6061铝合金力学 性能下降的主要原因，最严重的沿晶腐蚀裂纹深度达150μm.青岛大气中的硫化物不仅会侵蚀试样表面形成硫酸铝，还会浸 入到晶界促进沿晶腐蚀 关键词阳极氧化6061铝合金；电偶腐蚀；工业海洋大气环境；力学性能；沿晶腐蚀 分类号TG172.3 Galvanic corrosion of anodized 6061 aluminum alloy in an industrial-marine atmospher- ic environment WANG Sha-sha),YANG Lang),XIAO Kui),HUANG Yun-hua',LI Xiao-gang'2) 1)Corrosion and Protection Center,University of Science and Technology Beijing,Beijing 100083,China 2)Key Laboratory for Corrosion and Protection (MOE),Beijing 100083,China Corresponding author,E-mail:huangyh@mater.ustb.edu.cn ABSTRACT 6061 aluminum alloy is a material that is widely used for manufacturing aircraft.Boron-sulfuric acid anodization is of- ten used in the surface treatment of aluminum alloy to improve the corrosion resistance of the alloy in an outdoor atmosphere.However, few studies have been conducted on the galvanic corrosion of an anodized 6061 aluminum alloy coupled with high strength structural steel in an industrial-marine atmospheric environment.In this work,the outdoor atmospheric exposure test of an anodized 6061 alumi- num alloy coupled with 30CrMnSiNi2A steel of different surfaces was conducted in an industrial-marine atmospheric environment.The corrosion behavior and mechanism of the anodized 6061 aluminum alloy coupled with steel were investigated by means of electrochemi- cal measurement,corrosion product analysis,mechanical property testing,fracture analysis,and other measurements.After a one-year exposure test,the values of strength o and elongation 6 of the anodized 6061 aluminum alloy coupled with Cd-Ti plated 30CrMnSiNi2A steel decrease by 6.45%and 4.39%,respectively and have the lowest decline rate compared with the most serious de- cline rates of 10%and 62.28%,respectively,for the anodized 6061 coupled with naked 30CrMnSiNi2A steel and the moderate de- cline rates of 6.77%and 10.74%,respectively,for the uncoupled samples.The intergranular corrosion and pitting on the surface of anodized 6061 aluminum alloy result in a significant decrease in the mechanical property,with the deepest crack of intergranular corro- 收稿日期：2017-09-12 基金项目：国家自然科学基金资助项目(51471033)：国家重点研发计划资助项目(2016YFB0300604)工程科学学报,第 40 卷,第 7 期:833鄄鄄841,2018 年 7 月 Chinese Journal of Engineering, Vol. 40, No. 7: 833鄄鄄841, July 2018 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2018. 07. 009; http: / / journals. ustb. edu. cn 工业海洋大气环境下阳极氧化 6061 铝合金的电偶腐 蚀行为 王沙沙1) , 杨 浪1) , 肖 葵1,2) , 黄运华1,2) 苣 , 李晓刚1,2) 1) 北京科技大学腐蚀与防护中心, 北京 100083 2) 腐蚀与防护教育部重点实验室, 北京 100083 苣通信作者, E鄄mail: huangyh@ mater. ustb. edu. cn 摘 要 在青岛典型的工业海洋大气环境下,进行硼硫酸阳极氧化 6061 铝合金与不同表面状态的 30CrMnSiNi2A 结构钢偶接 件的户外大气暴露试验,通过电化学测试、腐蚀产物分析、力学性能检测、断口分析等,研究了偶接件中阳极氧化 6061 铝合金 的腐蚀规律与机理. 结果表明:经 1 a 户外大气暴露试验后,与镀镉钛结构钢偶接的 6061 阳极氧化铝合金力学性能最优,其强 度 滓b和延伸率 啄 分别比原始试样下降 6郾 45% 和 4郾 39% ,远优于与结构钢裸材偶接的阳极氧化 6061 铝合金试样(分别下降 10% 和 62郾 28% ),略优于未偶接试样(分别下降 6郾 77% 和 10郾 74% ). 沿晶腐蚀和表面点蚀是导致阳极氧化 6061 铝合金力学 性能下降的主要原因,最严重的沿晶腐蚀裂纹深度达 150 滋m. 青岛大气中的硫化物不仅会侵蚀试样表面形成硫酸铝,还会浸 入到晶界促进沿晶腐蚀. 关键词 阳极氧化 6061 铝合金; 电偶腐蚀; 工业海洋大气环境; 力学性能; 沿晶腐蚀 分类号 TG172郾 3 收稿日期: 2017鄄鄄09鄄鄄12 基金项目: 国家自然科学基金资助项目(51471033);国家重点研发计划资助项目(2016YFB0300604) Galvanic corrosion of anodized 6061 aluminum alloy in an industrial鄄marine atmospher鄄 ic environment WANG Sha鄄sha 1) , YANG Lang 1) , XIAO Kui 1,2) , HUANG Yun鄄hua 1,2) 苣 , LI Xiao鄄gang 1,2) 1) Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China 2) Key Laboratory for Corrosion and Protection (MOE), Beijing 100083, China 苣Corresponding author, E鄄mail: huangyh@ mater. ustb. edu. cn ABSTRACT 6061 aluminum alloy is a material that is widely used for manufacturing aircraft. Boron鄄鄄sulfuric acid anodization is of鄄 ten used in the surface treatment of aluminum alloy to improve the corrosion resistance of the alloy in an outdoor atmosphere. However, few studies have been conducted on the galvanic corrosion of an anodized 6061 aluminum alloy coupled with high strength structural steel in an industrial鄄marine atmospheric environment. In this work, the outdoor atmospheric exposure test of an anodized 6061 alumi鄄 num alloy coupled with 30CrMnSiNi2A steel of different surfaces was conducted in an industrial鄄marine atmospheric environment. The corrosion behavior and mechanism of the anodized 6061 aluminum alloy coupled with steel were investigated by means of electrochemi鄄 cal measurement, corrosion product analysis, mechanical property testing, fracture analysis, and other measurements. After a one鄄year exposure test, the values of strength 滓b and elongation 啄 of the anodized 6061 aluminum alloy coupled with Cd鄄鄄 Ti plated 30CrMnSiNi2A steel decrease by 6郾 45% and 4郾 39% , respectively and have the lowest decline rate compared with the most serious de鄄 cline rates of 10% and 62郾 28% , respectively, for the anodized 6061 coupled with naked 30CrMnSiNi2A steel and the moderate de鄄 cline rates of 6郾 77% and 10郾 74% , respectively, for the uncoupled samples. The intergranular corrosion and pitting on the surface of anodized 6061 aluminum alloy result in a significant decrease in the mechanical property, with the deepest crack of intergranular corro鄄