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中国腐蚀与防护学报  2002, Vol. 22 Issue (4): 198-201     
  研究报告 本期目录 | 过刊浏览 |
冷加工对304不锈钢孔蚀敏感性的影响
胡钢;许淳淳;张新生
北京化工大学材料科学与工程学院
EFFECT OF COLD WORKING ON PITTINGSUSCEPTIBILITY OF 304 STAINLESS STEEL
Gang Hu;Chunchun Xv;Xinsheng Zhang
北京化工大学材料科学与工程学院
全文: PDF(141 KB)  
摘要: 对304不锈钢设备由于冷加工产生的马氏体相变进行现场测 试.结果表明,室温下经不同方式、不同程度冷加工后,相关部位的马氏体相变量约在05 %~10%.用电化学动电位极化法、恒电流电位—时间曲线测定法和模拟闭塞电池法研究经 70℃不同程度拉伸变形的304不锈钢在35%NaCl水溶液(50℃±1℃)中的孔蚀击穿电位( Eb)、稳态孔蚀成核电位(Enp)和自腐蚀电位(Ecorr)与马氏体相 变量的关系.在马氏体含量为01%(材料未经冷变形)至115%(材料冷拉伸形变量为10%) 范围内,随马氏体含量增大,Eb、Enp、Ecorr值变负(马氏体 含量为5%时最负),闭塞区内pH值降低,阳极腐蚀电流密度变大,表明冷加工变形不仅诱发 304不锈钢孔蚀,并加速孔蚀发展.
关键词 304不锈钢马氏体孔蚀模拟闭塞电池    
Abstract:Cold working induced martensite content on type 304 stainless steel equipment was examined on-site.With different modes and differe nt degree of cold working at room temperature,the martensite content was about 0 . 5%~10%.By potentiodynamic polarization,galvanostatic polarization and simulated occluded corrosion cell methods,the relationship between pitting potential(E b),pitting initiation potential(Enp),corrosion potential(E corr) and martensite content on 304 stainless steel which had been prepared by low temperature(70℃) tensile deformation was investigated in 3.5%NaCl solut ion.Experimental result showed that when the martensite content was between 0.1% (the material without low temperature tensile deformation) and 11.5%(the mate rial with 10% low temperature tensile deformation),with the increas ing of martensite content the potential of Eb,Enp and Ec orr changed negative(when then martensite content is 5%,the potentials were th e most negative),the pH value in occluded cell dropped and the current density i ncreased.It meant that cold working not only accelerated pitting initiation,but also accelerated pitting propagation of 304 stainless steel.
Key words304 stainless steel    martensite    pitting    simulated occlu ded cell
收稿日期: 2001-06-29     
ZTFLH:  TG172.5  
通讯作者: 许淳淳     E-mail: chunchunxu@163.com
Corresponding author: Chunchun Xv     E-mail: chunchunxu@163.com

引用本文:

胡钢; 许淳淳; 张新生 . 冷加工对304不锈钢孔蚀敏感性的影响[J]. 中国腐蚀与防护学报, 2002, 22(4): 198-201 .
Gang Hu, Chunchun Xv, Xinsheng Zhang. EFFECT OF COLD WORKING ON PITTINGSUSCEPTIBILITY OF 304 STAINLESS STEEL. J Chin Soc Corr Pro, 2002, 22(4): 198-201 .

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2002/V22/I4/198

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