7475高强铝合金在海洋和乡村大气环境中的腐蚀行为研究
|
摘要
目的研究海洋和乡村大气环境对7475高强铝合金腐蚀行为的影响,为7475高强铝合金环境适应性设计提供支撑。方法在万宁和北京大气环境试验站开展了7475高强铝合金为期36个月的户外暴露试验,通过腐蚀失重分析方法研究了7475高强铝合金在我国2种典型大气环境中的腐蚀动力学规律;借助环境扫描电镜(ESEM)、金相显微镜和X射线光电子能谱(XPS)等表征技术研究了7475高强铝合金的微观腐蚀形貌和锈层成分。结果2种大气环境中,铝合金腐蚀都呈现出初始阶段腐蚀迅速发展,之后腐蚀速率减慢,最后进入腐蚀扩展相对平稳时期的变化规律。在海洋大气环境中户外暴露36个月后,7475高强铝合金呈现明显的点腐蚀特征,腐蚀产物组成为Al(OH)_3、Al_2O_3和Al_2Cl_3。7475高强铝合金在乡村大气环境中表面腐蚀非常轻微,个别表面出现非常小且浅的腐蚀点。结论在乡村大气环境和海洋大气环境中,7475高强铝合金腐蚀动力学遵循幂函数规律。相比较乡村大气环境,7475高强铝合金在海洋大气环境中表现出非常强的腐蚀敏感性。
The work aims to investigate the effect of marine and rural atmosphere environments on corrosion behavior of7475 high-strength aluminium alloy,and provide the support for the environment worthiness design of 7475 high-strength aluminium alloy.A 36-month outdoor exposure test was carried out to 7475 high-strength aluminium alloy in Wanning and Beijing atmosphere environment test sites and the atmospheric corrosion kinetics law of 7475 high-strength aluminium alloy in two Chinese typical atmosphere environment was investigated by dint of the weight loss.The micro-morphology and the composition of the rust of 7425 high-strength aluminium alloy were studied by the environmental scanning electron microscope(ESEM),metallographic microscope and X-ray photoelectron spectroscopy(XPS).The atmospheric corrosion rate of 7475high-strength aluminium alloy exposed in two atmosphere environments exhibited the same change law.The corrosion rate developed rapidly,then decreased with the prolongation of exposure time,and finally came to the stable stage of corrosion expansion.7475 high-strength aluminium alloy exposed in marine atmosphere environment for 36 months exhibited obvious pitting corrosion,and the corrosion product were mainly composed of AlCl_3,Al(OH)_3 and Al_2O_3.The corrosion on the surface of 7475high-strength aluminium alloy exposed in rural atmosphere environment was very slight and only small and shallow corrosion pits appeared on very few surface.In rural atmosphere and marine environments,the atmospheric corrosion kinetics of 7475high-strength aluminium alloy follows the power function.Compared with rural atmosphere environment,7475 high-strength aluminium alloy exhibited the strong corrosion susceptibility in marine atmosphere environment.
The work aims to investigate the effect of marine and rural atmosphere environments on corrosion behavior of7475 high-strength aluminium alloy,and provide the support for the environment worthiness design of 7475 high-strength aluminium alloy.A 36-month outdoor exposure test was carried out to 7475 high-strength aluminium alloy in Wanning and Beijing atmosphere environment test sites and the atmospheric corrosion kinetics law of 7475 high-strength aluminium alloy in two Chinese typical atmosphere environment was investigated by dint of the weight loss.The micro-morphology and the composition of the rust of 7425 high-strength aluminium alloy were studied by the environmental scanning electron microscope(ESEM),metallographic microscope and X-ray photoelectron spectroscopy(XPS).The atmospheric corrosion rate of 7475high-strength aluminium alloy exposed in two atmosphere environments exhibited the same change law.The corrosion rate developed rapidly,then decreased with the prolongation of exposure time,and finally came to the stable stage of corrosion expansion.7475 high-strength aluminium alloy exposed in marine atmosphere environment for 36 months exhibited obvious pitting corrosion,and the corrosion product were mainly composed of AlCl_3,Al(OH)_3 and Al_2O_3.The corrosion on the surface of 7475high-strength aluminium alloy exposed in rural atmosphere environment was very slight and only small and shallow corrosion pits appeared on very few surface.In rural atmosphere and marine environments,the atmospheric corrosion kinetics of 7475high-strength aluminium alloy follows the power function.Compared with rural atmosphere environment,7475 high-strength aluminium alloy exhibited the strong corrosion susceptibility in marine atmosphere environment.
引文
[1]刘静安.谢水生.铝合金材料应用与开发[M].北京:冶金工业出版社,2011.LIU Jing-an,XIE Shui-sheng.Exploitation and application of aluminium alloy[M].Beijing:Metallurgical Industry Press,2011.
[2]曹楚南.中国材料的自然环境腐蚀[M].北京:化学工业出版,2005.CAO Chu-nan.Material natural environmental corrosion of China[M].Beijing:Chemical Industry Press,2005.
[3]宣卫芳,胥泽奇,肖敏,等.装备与自然环境试验·基础篇[M].北京:航空工业出版,2009.XUAN Wei-fang,XU Ze-qi,XIAO Min,et al.Equipment and natural environmental test·basic course[M].Beijing:Aviation Industry Press,2009.
[4]LEYGRAF C,GRAEDEL T.Atmospheric corrosion[M].New York:John Wiley&Sons,Inc,2000.
[5]SUN Shuang-qing,ZHENG Qi-fei,LI De-fu,et al.Long-term atmospheric corrosion behaviour of aluminium alloys 2024 and 7075 in urban,coastal and industrial environments[J].Corrosion science,2009,51(4):719-727.
[6]WANG B B,WANG Z Y,HAN W,et al.Atmospheric corrosion of aluminium alloy 2024-T3 exposed to salt lake environment in western China[J].Corrosion science,2012,59:63-70.
[7]YANG Xiao-kui,ZHANG Lun-wu,ZHANG Shi-yan,et al.Properties degradation and atmospheric corrosion mechanism of 6061 aluminum alloy in industrial and marine atmosphere environments[J].Materials and corrosion,2017,68(5):529-535.
[8]ABALLE A,BETHENCOURT M,BOTANA F J,et al.Using EIS to study the electrochemical response of alloy AA5083 in solution of NaCl[J].Materials and corrosion,2001,52(3):185-192.
[9]王振尧,王彬彬,曹公望,等.盐沉积条件下CO2对LY12铝合金大气腐蚀的影响[J].表面技术,2017,46(4):79-83.WANG Zhen-yao,WANG Bin-bin,CAO Gong-wang,et al.Effects of CO2 on salt deposition-induced atmospheric corrosion of aluminum alloy LY12[J].Surface technology,2017,46(4):79-83.
[10]GUILLAUMIN V,MANKOWSKI G.Localized corrosion of 6056-T6 aluminum alloy in chloride media[J].Corrosion science,2000,42(1):105-125.
[11]BETHENCOURT M,BOTANA F J,CANO M J,et al.Behavior of the alloy AA2017 in aqueous solutions of NaCl.Part I:Corrosion mechanisms[J].Corrosion science,2009,51(3):518-524.
[12]WANG Bin,ZHANG Lun-wu,SU Yan,et al.Investigation on the corrosion behavior of aluminum alloys 3A21and 7A09 in chloride aqueous solution[J].Materials and design,2013,50:15-21.
[13]中国航空材料手册编辑委员会.中国航空材料手册(铝合金?镁合金)[M].北京:中国标准出版社,2002.China aviation materials handbook editorial committee.China aviation materials handbook(aluminum,magnesium)[M].Beijing:China Standard Press,2002.
[14]张晓君,宋绪丁,上官晓峰.盐雾腐蚀对7475铝合金疲劳寿命的影响[J].热加工工艺,2013,42(4):46-49.ZHANG Xiao-jun,SONG Xu-ding,SHANGGUAN Xiaofeng.Effect of salt spray corrosion on fatigue life of 7475Al alloy[J].Hot working technology,2013,42(4):46-49.
[15]宫玉辉,刘铭,张坤,等.不同腐蚀环境对7475-T7351铝合金疲劳性能及裂纹扩展速率的影响[J].材料工程,2010,30(9):71-73.GONG Yu-hui,LIU Ming,ZHANG Kun,et al.Effects of different corrosion environments on fatigue property and crack growth rate in 7475-T7351 aluminum alloy[J].Journal of materials engineering,2010,30(9):71-73.
[16]CUI Z Y,LI X G,XIAO K,et al.Atmospheric corrosion behaviour of pure Al 1060 in tropical marine environment[J].Corrosion engineering,science and technology,2015,50(6):438-448.
[17]DE L D,CASTA?O J G,MORCILLO M.Long-term atmospheric corrosion of zinc[J].Corrosion science,2007,49(3):1420-1436.
[18]YANG Xiao-kui.ZHANG Lun-wu,LIU Ming,et al.Atmospheric corrosion behaviour of 30CrMnSiA highstrength steel in rural,industrial and marine atmosphere environments[J].Corrosion engineering,science and technology,2017,52(3):226-235.
[19]MOULDER J F,STICKLE W F,SOBOL P E,et al.Handbook of X-ray photoelectron spectroscopy[M].Norwalk:Perkin-Elmer Corporation,1992.
[20]RUMBLE J R,BICKHAM D M,POWELL C J,et al.The NIST X-ray photoelectron spectroscopy database[J].Surface and interface analysis,1992,19:241-246.
[21]MENDOZA A R,CORVO F.Outdoor and indoor atmospheric corrosion of non-ferrous metals[J].Corrosion science,2000,42(7):1123-1147.
[22]LUNT T T,SCULLY J R,BRUSAMARELLO V,et al.Spatial interactions among localized corrosion sites:Experiments and modeling[J].Journal of electrochemical social,2002,149:163-173.
[23]LUCENTE A M,SCULLY J R.Pitting and alkaline dissolution of an amorphous-nanocrystalline alloy with solute-lean nanocrystals[J].Corrosion science,2007,49(5):2351-2361.
[24]MACDONALD D D.The point defect model for the passive state[J].Journal of electrochemical social,1992,139(12):343-3449.
[2]曹楚南.中国材料的自然环境腐蚀[M].北京:化学工业出版,2005.CAO Chu-nan.Material natural environmental corrosion of China[M].Beijing:Chemical Industry Press,2005.
[3]宣卫芳,胥泽奇,肖敏,等.装备与自然环境试验·基础篇[M].北京:航空工业出版,2009.XUAN Wei-fang,XU Ze-qi,XIAO Min,et al.Equipment and natural environmental test·basic course[M].Beijing:Aviation Industry Press,2009.
[4]LEYGRAF C,GRAEDEL T.Atmospheric corrosion[M].New York:John Wiley&Sons,Inc,2000.
[5]SUN Shuang-qing,ZHENG Qi-fei,LI De-fu,et al.Long-term atmospheric corrosion behaviour of aluminium alloys 2024 and 7075 in urban,coastal and industrial environments[J].Corrosion science,2009,51(4):719-727.
[6]WANG B B,WANG Z Y,HAN W,et al.Atmospheric corrosion of aluminium alloy 2024-T3 exposed to salt lake environment in western China[J].Corrosion science,2012,59:63-70.
[7]YANG Xiao-kui,ZHANG Lun-wu,ZHANG Shi-yan,et al.Properties degradation and atmospheric corrosion mechanism of 6061 aluminum alloy in industrial and marine atmosphere environments[J].Materials and corrosion,2017,68(5):529-535.
[8]ABALLE A,BETHENCOURT M,BOTANA F J,et al.Using EIS to study the electrochemical response of alloy AA5083 in solution of NaCl[J].Materials and corrosion,2001,52(3):185-192.
[9]王振尧,王彬彬,曹公望,等.盐沉积条件下CO2对LY12铝合金大气腐蚀的影响[J].表面技术,2017,46(4):79-83.WANG Zhen-yao,WANG Bin-bin,CAO Gong-wang,et al.Effects of CO2 on salt deposition-induced atmospheric corrosion of aluminum alloy LY12[J].Surface technology,2017,46(4):79-83.
[10]GUILLAUMIN V,MANKOWSKI G.Localized corrosion of 6056-T6 aluminum alloy in chloride media[J].Corrosion science,2000,42(1):105-125.
[11]BETHENCOURT M,BOTANA F J,CANO M J,et al.Behavior of the alloy AA2017 in aqueous solutions of NaCl.Part I:Corrosion mechanisms[J].Corrosion science,2009,51(3):518-524.
[12]WANG Bin,ZHANG Lun-wu,SU Yan,et al.Investigation on the corrosion behavior of aluminum alloys 3A21and 7A09 in chloride aqueous solution[J].Materials and design,2013,50:15-21.
[13]中国航空材料手册编辑委员会.中国航空材料手册(铝合金?镁合金)[M].北京:中国标准出版社,2002.China aviation materials handbook editorial committee.China aviation materials handbook(aluminum,magnesium)[M].Beijing:China Standard Press,2002.
[14]张晓君,宋绪丁,上官晓峰.盐雾腐蚀对7475铝合金疲劳寿命的影响[J].热加工工艺,2013,42(4):46-49.ZHANG Xiao-jun,SONG Xu-ding,SHANGGUAN Xiaofeng.Effect of salt spray corrosion on fatigue life of 7475Al alloy[J].Hot working technology,2013,42(4):46-49.
[15]宫玉辉,刘铭,张坤,等.不同腐蚀环境对7475-T7351铝合金疲劳性能及裂纹扩展速率的影响[J].材料工程,2010,30(9):71-73.GONG Yu-hui,LIU Ming,ZHANG Kun,et al.Effects of different corrosion environments on fatigue property and crack growth rate in 7475-T7351 aluminum alloy[J].Journal of materials engineering,2010,30(9):71-73.
[16]CUI Z Y,LI X G,XIAO K,et al.Atmospheric corrosion behaviour of pure Al 1060 in tropical marine environment[J].Corrosion engineering,science and technology,2015,50(6):438-448.
[17]DE L D,CASTA?O J G,MORCILLO M.Long-term atmospheric corrosion of zinc[J].Corrosion science,2007,49(3):1420-1436.
[18]YANG Xiao-kui.ZHANG Lun-wu,LIU Ming,et al.Atmospheric corrosion behaviour of 30CrMnSiA highstrength steel in rural,industrial and marine atmosphere environments[J].Corrosion engineering,science and technology,2017,52(3):226-235.
[19]MOULDER J F,STICKLE W F,SOBOL P E,et al.Handbook of X-ray photoelectron spectroscopy[M].Norwalk:Perkin-Elmer Corporation,1992.
[20]RUMBLE J R,BICKHAM D M,POWELL C J,et al.The NIST X-ray photoelectron spectroscopy database[J].Surface and interface analysis,1992,19:241-246.
[21]MENDOZA A R,CORVO F.Outdoor and indoor atmospheric corrosion of non-ferrous metals[J].Corrosion science,2000,42(7):1123-1147.
[22]LUNT T T,SCULLY J R,BRUSAMARELLO V,et al.Spatial interactions among localized corrosion sites:Experiments and modeling[J].Journal of electrochemical social,2002,149:163-173.
[23]LUCENTE A M,SCULLY J R.Pitting and alkaline dissolution of an amorphous-nanocrystalline alloy with solute-lean nanocrystals[J].Corrosion science,2007,49(5):2351-2361.
[24]MACDONALD D D.The point defect model for the passive state[J].Journal of electrochemical social,1992,139(12):343-3449.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |