Preferential Corrosion Behavior of Carbon Steel Weld in Simulation Pore Solution and the Inhibition Performance of Nitrite
LIU Liang1, XU Yunze1, WANG Xiaona2, HE Limin1, HUANG Yi1
1 School of Naval Architecture Engineering, Dalian University of Technology, Dalian 116024; 2 School of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian 116024
Abstract: Through the development of an eight-channel multi-electrode array sensor system and the immersion test, the corrosion process of carbon steel weld and the inhibition performance of nitrite on weld were studied in simulation pore solution. The galvanic corrosion among weld metal, heat affected zone and base metal and the inhibition performance of nitrite were studied by measuring the individual open circuit potential, coupled potential and galvanic current. The measurement results of multi-electrode array sensor system and immersion test showed the weld metal and the nearby area of weld metal would corrode preferentially. The inhibitor NaNO2 performed well inhibition effect for the welding corrosion by reducing the galvanic current apparently.
1 Hemmingsen T, Hovdan H, Sanni P, et al. The influence of electrolyte reduction potential on weld corrosion[J]. Electrochim Acta, 2002,47(24):3949. 2 Nimmo W, Griffiths A J, Orkney L, et al. Evaluation of techniques for measuring corrosion activity of carbon steel welds[J]. British Corros J, 2002,37(3):182. 3 Cui Y, Lundin C D. Evaluation of initial corrosion location in E316L austenitic stainless steel weld metals[J]. Mater Lett, 2005,59(12):1542. 4 Alawadhi K, Robinson M J. Preferential weld corrosion of X65 pipeline steel in flowing brines containing carbon dioxide[J]. Corros Eng Sci Technol, 2011,46(4):318. 5 Chaves I A, Melchers R E. Pitting corrosion in pipeline steel weld zones[J]. Corros Sci, 2011,53(12):4026. 6 Alawadhi K, Aloraier A S, Joshi S, et al. Investigation on preferential corrosion of welded carbon steel under flowing conditions by EIS[J]. J Mater Eng Perform, 2013,22(8):2403. 7 Alawadhi K, Martinez M, Aloraier A. Effect of inhibitors on prefe-rential weld corrosion under sweet conditions[J]. Corros Eng Sci Technol, 2014,3(61):172. 8 Bautista A, Paredes E C, Alvarez S M, et al. Welded, sandblasted, stainless steel corrugated bars in non-carbonated and carbonated mortars: A 9-year corrosion study[J]. Corros Sci, 2016,102:363. 9 Ayyub B M, Naji AI-Mutair, Peter Chang. Structural strength of bridge decks reinforced with weld wire fabric[J]. J Struct Eng, 1996,122(9):989. 10Gilbert R I, Sakka Z I. Strength and ductility of reinforced concrete slabs containing welded wire fabric and subjected to support settlement[J]. Eng Struct, 2010,32(6):1509. 11Medeiros-Junior R A d, Lima M G d, Brito P C d, et al. Chloride penetration into concrete in an offshore platform-analysis of exposure conditions[J]. Ocean Eng, 2015,103:78. 12Song Y, Song L, Zhao G. Factors affecting corrosion and approaches for improving durability of ocean reinforced concrete structures[J]. Ocean Eng, 2004,31(5-6):779. 13Poursaee A. Corrosion of steel bars in saturated Ca(OH)2 and concrete pore solution[J]. Concr Res Lett, 2010,1(3):90. 14Huang Y, Yang L J, Xu Y Z, et al. A novel system for corrosion protection of reinforced steels in the underwater zone[J]. Corros Eng Sci Technol, 2016,51(8):566. 15Dong Z H, Shi W, Zhang G A, et al. The role of inhibitors on the repassivation of pitting corrosion of carbon steel in synthetic carbonated concrete pore solution[J]. Electrochim Acta, 2011,56(17):5890. 16Sideris K K, Savva A E. Durability of mixtures containing calcium nitrite based corrosion inhibitor[J]. Cem Concr Compos, 2005,27(2):277. 17Dong Z H, Shi W, Guo X P. Localized corrosion inhibition of carbon steel in carbonated concrete pore solutions using wire beam electrodes[J]. Acta Phys Chim Sin, 2011,27(1):127. 董泽华,石维,郭兴蓬. 用丝束电极研究模拟碳化混凝土孔隙液中缓蚀剂对碳钢局部腐蚀的抑制行为[J]. 物理化学学报, 2011,27(1):127. 18Dong Z H, Shi W, Guo X P. Initiation and repassivation of pitting corrosion of carbon steel in carbonated concrete pore solution[J]. Corros Sci, 2011,53(4):1322. 19Legat A, Leban M, Bajt Ž. Corrosion processes of steel in concrete characterized by means of electrochemical noise[J]. Electrochim Acta, 2004,49(17-18):2741. 20Tan Y J, Bailey S, Kinsella B. The monitoring of the formation and destruction of corrosion inhibitor films using electrochemical noise ansys (ENA)[J]. Corros Sci, 1996,38(10):1681. 21Xu Y Z, Yang L J, He L M, et al. The monitoring of galvanic corrosion behavior caused by mineral deposit in pipeline working conditions using ring form electronic resistance sensor system[J]. Corros Eng Sci Technol, 2016,51(8):606. 22Yang L, Cragnolino G, Sridhar N. Comparison of localized corrosion of Fe-Ni-Cr-Mo alloys in chloride solutions using a coupled multielectrode array sensor[C]//Proceeding Conference Corrosion. Houston, NACE Intemational, 2002.23Yang L, Sun X. Measurement of cumulative localized corrosion rate using coupled multi-electrode array sensors [C]//Proceeding Confe-rence Corrosion 2007. Houston, NACE International, 2007. 24Sun X, Yang L. Real-time monitoring of localized and general corrosion rates in drinking water systems utilizing coupled multi-electrode sensors[C]//Proceeding Conference Corrosion 2007. Houston, NACE International, 2006. 25Yang L, Chiang K, Yu H, et al. Threshold chloride levels for loca-lized carbon steel corrosion in simulated concrete pore solution using coupled multi-electrode array sensors[J]. Corrosion, 2012,70(8):142. 26Fushimi K, Naganuma A, Azumi K, et al. Current distribution du-ring galvanic corrosion of carbon steel welded with type-309 stainless steel in NaCl solution[J]. Corros Sci, 2008,50(3):903. 27Legat A. Monitoring of steel corrosion in concrete by electrode arrays and electrical resistance probes[J]. Electrochim Acta, 2007,52(27):7590. 28Shi W, Dong Z H, Kong D J, et al. Application of wire beam electrode technique to investigate initiation and propagation of rebar corrosion[J]. Cem Concr Res, 2013,48:25.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2017, Vol. 31 
