|
|
|
| MONITORING THE PITTING SUSCEPTIBILITY OF AUSTENITIC STAINLESS STEEL IN NaCl SOLUTION BY ELECTRONIC SPECKLE PATTERN INTERFEROMETRY |
| XU Shan,DU Nan,ZHAO Qing,YE Mingyang |
| Key Laboratory for NDT Technology of the Ministry of Education, Nanchang Hangkong University, Nanchang 330063 |
|
|
|
|
Abstract The pitting susceptibility of 1Cr18Ni9Ti、304 and 316 austenitic stainless steel in 3.5 %NaCl solution was monitored by potential dynamic polarization and electrochemical impedance spectroscope. The pitting induction time (τ) and in-situ changes of electrode surface for the three types of materials in 3.5 %NaCl solution were monitered by electronic speckle pattern interferometry (ESPI) and the chrono amperometry. The results indicated that, bright speckles in ESPI images show pitting corrosion occurring on metal surface. The speckles in ESPI were caused by the pitting corrosion products. The value of pitting induction time (τ) for 1Cr18Ni9Ti and 304 steel were 1 s and 9 s. The value of pitting induction time (τ) for 316 steel was more than 50 s. The results of ESPI showed that, in the 3.5 %NaCl solution, the pitting susceptibility of 1Cr18Ni9Ti was the worst of the three types of materials, and the 316 steel was the best. The result of ESPI was in agreement with that of potential dynamic polarization and electrochemical impedance spectroscope. ESPI can be used as a laboratory technique to monitor the initial pitting susceptibility of metals.
|
|
Received: 11 August 2009
|
|
|
| [1] Hu L H，Du N，Wang M F，et al．Pitting electrochemical features of 1Cr18Ni9Ti stainless steel in acidic NaCl solution [J]．Failure Anal. Prev., 2006, 1(3): 6-9
(胡丽华，杜楠，王梅丰等．1Cr18Ni9Ti不锈钢在酸性NaCl溶液中的点蚀电化学特征 [J]. 失效分析与预防, 2006, 1(3): 6-9)
[2] Zhang J Q，Zhang Z，Wang J M, et al．Analysis and application of electrochemical noise-Ⅰ．Theory of electrochemical noise analysis [J]．J．Chin．Soc．Corros．Prot., 2001，21(5)：310-320
(张鉴清，张昭，王建明等．电化学噪声的分析与应用-Ⅰ．电化学噪声的分析原理 [J]．中国腐蚀与防护学报，2001，21(5)：310-320)
[3] Butter J N，Leendertz J A．Speckle pattern and holographic techniques in engineering metrology [J]．Opt. Laser Technol.，1971，3(36)：26-30
[4] Silva Gomes J F，Monteiro J M．NDI of interfaces in coating systems using digital interferometry [J]．Mech. Mater.，2000，3(32)：837-843
[5] Wang M F，Du N，Li X G，et al．Monitoring initial pitting corrosion of 45 steel in NaCO3-NaCl solution by ESPI [J]．J．Chin．Soc．Corros．Prot．，2009，29(3)：210-214
(王梅丰，杜楠，李晓刚等．利用电子散斑干涉技术研究45碳钢在NaCO3-NaCl体系中的早期点蚀行为 [J]．中国腐蚀与防护学报，2009，29(3)：210-214)
[6] Wang M F．Study on initial pitting corrosion behaviors and mechanisms of metals using electronic speckle pattern interferometry [D]．Beijing：University of Science and Technology Beijing，2008
(王梅丰．利用激光电子散斑研究金属点蚀早期腐蚀行为及机理 [D]．北京：北京科技大学，2008)
[7] Cao C N．Introduction of Electrochemical Impedance Spectroscopy [M]．Beijing：Science Press，2002：190-192
(曹楚南．电化学阻抗谱导论 [M]．北京：科学出版社，2002：190-192)
[8] Li J F，Zhang C，Cheng Y L，et al．Electrochemical corrosion characteristics of Al-Li alloy in NaCl solution [J]．Acta Metal.Sin., 2002，38(7)：760-764
(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)
[9] Wang M F，Li X G，Du N，et al．Direct evidence of initial pitting corrosion [J]．Electrochem. Commun.，2008，10(7)：1000-1004
[10] Wang M F，Du N，Li X G，et al．Initial stage monitoring of pitting corrosion of 1Cr18Ni9Ti stainless steel in sodium chloride solution using ESPI [J]．Corros. Prot.，2009，30(1)：29-31
(王梅丰，杜楠，李晓刚等．激光电子散斑干涉技术监测1Cr18Ni9Ti不锈钢在氯化钠溶液中的早期点蚀行为 [J]．腐蚀与防护，2009，30(1)：29-31) |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
