高铁不锈钢焊接接头在海洋大气环境中的腐蚀行为
|
摘要
为了提高高铁的行车安全,通过现场暴露试验,采用数码显微镜、能量色散谱、拉曼光谱及电化学测量方法研究了高铁不锈钢焊接接头在万宁海洋大气环境中暴露2 a后的腐蚀行为规律。结果表明:暴晒2a后不锈钢焊接接头的腐蚀类型以点蚀为主,蚀坑密度较高;腐蚀产物主要有Fe_3O_4、α-Fe_2O_3、γ-Fe_2O_3、α-FeOOH、β-FeOOH和γ-FeOOH,不锈钢焊接试样在3.5%NaCl溶液中阳极行为存在一定钝化特性;各区域点蚀电位高低排序为筋板母材区>底板母材区>焊缝区。
In order to improve the driving safety of high-speed railway,the stainless steel welded joints for high-speed railway in Wanning marine atmosphere were exposed for 2 a by field exposure tests,and the corrosion behaviors were studied by digital microscope,energy dispersive spectrum,Raman spectrum and electrochemical measurement. Results showed that the dominant corrosion type of welded joints of stainless steel was pitting corrosion after exposure for 2 a,and the density of corrosion pits was high. The corrosion products were mainly composed of Fe_3O_4,α-Fe_2O_3,γ-Fe_2O_3,α-Fe OOH,β-Fe OOH and γ-Fe OOH,and the stainless steel welding sample presented a certain passivation characteristic in the anode in 3.5% Na Cl solution. Moreover,the order of pitting corrosion potential in each area was as follows:stiffened plate zone > bottom plate base material area > weld zone.
In order to improve the driving safety of high-speed railway,the stainless steel welded joints for high-speed railway in Wanning marine atmosphere were exposed for 2 a by field exposure tests,and the corrosion behaviors were studied by digital microscope,energy dispersive spectrum,Raman spectrum and electrochemical measurement. Results showed that the dominant corrosion type of welded joints of stainless steel was pitting corrosion after exposure for 2 a,and the density of corrosion pits was high. The corrosion products were mainly composed of Fe_3O_4,α-Fe_2O_3,γ-Fe_2O_3,α-Fe OOH,β-Fe OOH and γ-Fe OOH,and the stainless steel welding sample presented a certain passivation characteristic in the anode in 3.5% Na Cl solution. Moreover,the order of pitting corrosion potential in each area was as follows:stiffened plate zone > bottom plate base material area > weld zone.
引文
[1]黄俊霞.不锈钢在中国应用的新领域---城市轨道交通客车[J].中国冶金,2005,15(10):4-6.
[2]吕虹玮,董士刚,王静静,等.316L不锈钢焊缝腐蚀行为的电化学研究[J].科技导报,2013,31(增刊1):25-28
[3]刘郁.双相不锈钢焊接接头耐蚀性的研究进展[J].机械工程与自动化,2017(2):214-216.
[4]雷晓维,冯耀荣,张建勋,等.不锈钢焊接接头腐蚀行为研究进展[J].焊管,2015,38(2):37-41.
[5]BLASCO-TAMARIT E,García-García D M,Antón J G.Imposed potential measurements to evaluate the pitting corrosion resistance and the galvanic behaviour of a highly alloyed austenitic stainless steel and its weldment in a Li Br solution at temperatures up to 150℃[J].Corrosion Science,2011,53(2):784-795.
[6]QIAN M,DUPONT J N.Microsegregation-related pitting corrosion characteristics of AL-6XN superaustenitic stainless steel laser welds[J].Corrosion Science,2010,52(10):3 548-3 553.
[7]Sánchez-Tovar R,Monta1és M T,García-Antón J.Effect of the micro-plasma arc welding technique on the microstructure and pitting corrosion of AISI 316L stainless steels in heavy Li Br brines[J].Corrosion Science,2011,53(8):2 598-2 610.
[8]NAGE D D,RAJA V S.Effect of nitrogen addition on the stress corrosion cracking behavior of 904L stainless steel welds in 288℃deaerated water[J].Corrosion Science,2006,48(8):2 317-2 331.
[9]GARCIA C,TIEDRA M P D,BLANCO Y,et al.Intergranular corrosion of welded joints of austenitic stainless steels studied by using an electrochemical minicell[J].Corrosion Science,2008,50(4):1 184-1 194.
[10]佚名.万宁自然环境试验站[J].装备环境工程,2008,5(2):93-94.
[11]Dünnwald J,OTTO A.An investigation of phase transitions in rust layers using Raman spectroscopy=Etude des transitions de phase dans les couches de rouille par spectroscopie Raman[J].Corrosion Science,1989,29(9):1 167-1 176.
[12]胡涛,路欣,阎研,等.用纯铁氧化法生长的铁氧化物样品的拉曼光谱研究[J].光谱学与光谱分析,2004,24(9):1 072-1 074.
[13]MERL D K,PANJAN P,CEKADA M,et al.The corrosion behavior of Cr-(C,N)PVD hard coatings deposited on various substrates[J].Electrochimica Acta,2004,49(9):1 527-1 533.
[14]LIU C,BI Q,LEYLAND A,et al.An electrochemical impedance spectroscopy study of the corrosion behaviour of PVD coated steels in 0.5 N Na Cl aqueous solution:Part II.EIS interpretation of corrosion behaviour[J].Corrosion Science,2003,45(6):1 257-1 273.
[2]吕虹玮,董士刚,王静静,等.316L不锈钢焊缝腐蚀行为的电化学研究[J].科技导报,2013,31(增刊1):25-28
[3]刘郁.双相不锈钢焊接接头耐蚀性的研究进展[J].机械工程与自动化,2017(2):214-216.
[4]雷晓维,冯耀荣,张建勋,等.不锈钢焊接接头腐蚀行为研究进展[J].焊管,2015,38(2):37-41.
[5]BLASCO-TAMARIT E,García-García D M,Antón J G.Imposed potential measurements to evaluate the pitting corrosion resistance and the galvanic behaviour of a highly alloyed austenitic stainless steel and its weldment in a Li Br solution at temperatures up to 150℃[J].Corrosion Science,2011,53(2):784-795.
[6]QIAN M,DUPONT J N.Microsegregation-related pitting corrosion characteristics of AL-6XN superaustenitic stainless steel laser welds[J].Corrosion Science,2010,52(10):3 548-3 553.
[7]Sánchez-Tovar R,Monta1és M T,García-Antón J.Effect of the micro-plasma arc welding technique on the microstructure and pitting corrosion of AISI 316L stainless steels in heavy Li Br brines[J].Corrosion Science,2011,53(8):2 598-2 610.
[8]NAGE D D,RAJA V S.Effect of nitrogen addition on the stress corrosion cracking behavior of 904L stainless steel welds in 288℃deaerated water[J].Corrosion Science,2006,48(8):2 317-2 331.
[9]GARCIA C,TIEDRA M P D,BLANCO Y,et al.Intergranular corrosion of welded joints of austenitic stainless steels studied by using an electrochemical minicell[J].Corrosion Science,2008,50(4):1 184-1 194.
[10]佚名.万宁自然环境试验站[J].装备环境工程,2008,5(2):93-94.
[11]Dünnwald J,OTTO A.An investigation of phase transitions in rust layers using Raman spectroscopy=Etude des transitions de phase dans les couches de rouille par spectroscopie Raman[J].Corrosion Science,1989,29(9):1 167-1 176.
[12]胡涛,路欣,阎研,等.用纯铁氧化法生长的铁氧化物样品的拉曼光谱研究[J].光谱学与光谱分析,2004,24(9):1 072-1 074.
[13]MERL D K,PANJAN P,CEKADA M,et al.The corrosion behavior of Cr-(C,N)PVD hard coatings deposited on various substrates[J].Electrochimica Acta,2004,49(9):1 527-1 533.
[14]LIU C,BI Q,LEYLAND A,et al.An electrochemical impedance spectroscopy study of the corrosion behaviour of PVD coated steels in 0.5 N Na Cl aqueous solution:Part II.EIS interpretation of corrosion behaviour[J].Corrosion Science,2003,45(6):1 257-1 273.