碳钢在含氯离子环境中腐蚀机理的研究
CORROSION MECHANISM OF CARBON STEEL IN CHLORIDE SOLUTION
摘 要
通过对碳钢在3%NaCl溶液中进行50h浸渍干湿复合循环试验的锈层进行IR、XRD和SEM分析,确定腐蚀产物包括γ-FeOOH、α-FeOOH、 Fe3O4和少量β-FeOOH.并提出γ-FeOOH和有保护能力的α-FeOOH是由FeOH+吸附在Fe5HO8·4H2O表面促使其溶解并转化而来;β-FeOOH和Fe3O4都是由绿锈转化而来,β-FeOOH还可自动转化成大颗粒α-FeOOH,它们都与高速度腐蚀有关.
加速腐蚀
海洋大气
机理
Carbon steel
Accelerated corrosion
Marine atmosphere
Mechanism
Abstract
An accelerated corrosion test of immersion-dry-wet combined cycles for carbon steel in 3%NaCl solution for 50h was performed.The corrosion products were analyzed by meas of IR,XRD and SEM.The corrosion products were composed of γ-FeOOH,α-FeOOH,Fe3O4 and a little β-FeOOH.The γ-FeOOH and α-FeOOH were formed due to the transformation from Ferrihydrite(Fe5HO8·4H2O) which dissolved by FeOH+.β-FeOOH and Fe3O4 were transformed from green rust.The α-FeOOH with course grains was transformed from β-FeOOH automatically.The products were related to high corrosion rate.
中图分类号 TG172.5
所属栏目 试验研究
基金项目
收稿日期 2006/3/6
修改稿日期 2006/6/1
网络出版日期
作者单位点击查看
引用该论文: CHEN Hui-ling,LI Xiao-juan,WEI Yu. CORROSION MECHANISM OF CARBON STEEL IN CHLORIDE SOLUTION[J]. Corrosion & Protection, 2007, 28(1): 17～19
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【4】罗建成,莫烨强,郑丽群,刘志平,孙亮,侯艳宏, "局部腐蚀引起电感探针数据的失真",腐蚀与防护 35, 1044-1047(2014)
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参考文献
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【2】Marco J F,Gracia M,Gancedo J R,et al.Characterization of the corrosion products forned on carbon steel after exposure to the open atmosphere in the antarctic and easter island[J].Corrosion Science,2000,42:753-771.
【3】马子川,魏 雨,郑学忠,等.Fe(Ⅱ)浓度及pH值对γ-FeOOH相转化为α-Fe2O3时间的影响[J].磁性材料及气器件,1998,29(2):43-45,49.
【4】Hui Liu,Yu Wei,Yuhan Sun.The formation mechanism from ferrihydrite to hematite when Fe(Ⅱ) used as a catalyst[J] .Journal of Molecular Catalysis A:Chemical,2005,226:135-140.
【5】Nishimura T,Katayama H,Noda K.Electrochemical behavior of rust formed on carbon steel in a wet/dryenvironment containing chloride ions[J].Corrosion,2000,56(9):935-941.
【6】Asami K,Kikuchi M.In-depth distribution of rusts on a plain carbon steel and weathering steelsexposed to coastal-industrial atmosphere for 17 years[J].Corrosion Science,2003,45(11):2671-2688.
【7】Sei J.Oh,D.C.Cook,H.E.Townsend.Atmospheric corrosion of different steels in marine,rural and industrial eviroments[J].Corrosion Science,1999,41:1687-1702.
【8】克 舍.金属腐蚀[M].北京:化学工业出版社,1984,7:230-239.
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