氮对2205双相不锈钢在NaCl溶液中耐腐蚀性能的影响
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摘要
在实验室条件下,以氮代镍冶炼节约型双相不锈钢2205-N,并采用电化学阻抗技术和电化学极化曲线法研究了试验钢在3.5%Na Cl(质量分数)溶液中的腐蚀行为。试验结果表明:在N含量(质量分数) 0. 11%～0. 35%范围内,随着N含量的增大,试验钢奥氏体相逐渐增多且晶粒细化、容抗弧半径逐渐增大、极化电阻R_p逐渐增大、腐蚀电流I_(corr)逐渐减小,2205-N双相不锈钢的抗腐蚀性随着N含量的增大逐渐增强。试验证明,以氮代镍生产节约型双相不锈钢是行之有效的。
Under laboratory conditions,an economical duplex stainless steel 2205-N was produced by using nitrogen to replace nickel,and the corrosion resistance of the tested steel in 3.5% NaCl( mass fraction) solution was investigated by electrochemical impedance spectroscopy and electrochemical polarization curves.The experimental results show that austenite phase in the tested steel increases with increasing nitrogen content in the range of 0.11%-0.35%,and the grain size is refined.The capacitive arc radius and the polarization resistance increase as the nitrogen content increases,however,the corrosion current gradually decreases.The corrosion resistance of the 2205-N DSS gradually increases with the increase of nitrogen content.The method of nitrogen replacing nickel is proved to be an effective way to produce economized duplex stainless steel.
Under laboratory conditions,an economical duplex stainless steel 2205-N was produced by using nitrogen to replace nickel,and the corrosion resistance of the tested steel in 3.5% NaCl( mass fraction) solution was investigated by electrochemical impedance spectroscopy and electrochemical polarization curves.The experimental results show that austenite phase in the tested steel increases with increasing nitrogen content in the range of 0.11%-0.35%,and the grain size is refined.The capacitive arc radius and the polarization resistance increase as the nitrogen content increases,however,the corrosion current gradually decreases.The corrosion resistance of the 2205-N DSS gradually increases with the increase of nitrogen content.The method of nitrogen replacing nickel is proved to be an effective way to produce economized duplex stainless steel.
引文
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[14]Lu Y C,Bandy R,Clayton C R,et al.Surface enrichment of Nitrogen during passivation of a highly resistant stainless steel[J].Journal of the Electrochemical Society,1983,130(8):1774-1776.
[15]Grabke H J.The role of nitrogen in the corrosion of iron and steels[J].ISIJ International,1996,36(7):777-786.
[16]崔大伟,曲选辉,李科.高氮低镍奥氏体不锈钢的研究进展[J].材料导报,2005,12(12):64-67.Cui Dawei,Qu Xuanhui,Li Ke.Research progress in high-nitrogen low-nickel austenitic stainless steel[J].Materials Review,2005,12(12):64-67.
[2]范强强,华丽.2205双相不锈钢腐蚀行为的影响因素[J].腐蚀科学与防护技术,2014,26(2):178-182.Fan Qiangqiang,Hua Li.Factors affecting corrosion behavior of 2205duplex stainless steel[J].Corrosion Science and Protection Technology,2014,26(2):178-182.
[3]刘佐嘉,程学群,李晓刚,等.点缺陷模型在2205双相不锈钢中的应用[J].中国腐蚀与防护学报,2013,33(2):90-96.Liu Zuojia,Cheng Xuequn,Li Xiaogang,et al.Application of PDM(point defect model)on 2205 duplex stainless steel[J].Journal of Chinese Society for Corrosion and Protection,2013,33(2):90-96.
[4]张天翼,吴俊升,郭海龙,等.模拟海水中HSO-3对2205双相不锈钢钝化膜成分及耐蚀性能的影响[J].中国腐蚀与防护学报,2016,36(6):535-542.Zhang Tianyi,Wu Junsheng,Guo Hailong,et al.Influence of HSO-3on passive film composition and corrosion resistance of 2205 duplex stainless steel in simulated seawater[J].Journal of Chinese Society for Corrosion and Protection,2016,36(6):535-542.
[5]Wu Wei,Liu Zhiyong,Hu Shanshan,et al.Effect of p H and hydrogen on the stress corrosion cracking behavior of duplex stainless steel in marine atmosphere environment[J].Ocean Engineering,2017,146:311-323.
[6]Dong Chaofang,Luo Hong,Xiao Kui,et al.Effect of temperature and Clconcentration on pitting of 2205 duplex stainless steel[J].Journal of Wuhan University of Technology Material Science Editian,2011,26(4):641-647.
[7]杨斌,陈吉,耿越,等.2205双相不锈钢在Na Cl溶液中的疲劳裂纹扩展行为[J].材料保护,2017,50(9):27-30.Yang Bin,Chen Ji,Geng Yue,et al.Corrosion fatigue crack propagation behavior of 2205 duplex stainless steel in Na Cl solution[J].Materials Protection,2017,50(9):27-30.
[8]Xu Dake,Zhou Enze,Zhao Ying,et al.Enhanced resistance of 2205Cu-bearing duplex stainless steel towards microbiologically influenced corrosion by marine aerobic Pseudomonas aeruginosa biofilms[J].Journal of Materials Science&Technology,2018,34(8):1325-1336.
[9]孙贵训.高氮无镍奥氏体不锈钢力学行为及其变形机制的研究[D].长春:吉林大学,2017.Sun Guixun.The mechanical behavior and relevant mechanisms of high nitrogen nickel-free austenitic stainless steel[D].Changchun:Jilin University,2017.
[10]王耘涛,布茂东.低镍和无镍奥氏体不锈钢的研究现状及进展[J].金属热处理,2013,38(1):15-20.Wang Yuntao,Bu Maodong.Present research and progress on lownickel and nickel-free austenitic stainless steels[J].Heat Treatment of Metals,2013,38(1):15-20.
[11]孙永庆,刘振宝,王长军,等.N含量对0Cr16Ni5Mo马氏体不锈钢力学性能和组织的影响[J].金属热处理,2019,44(3):69-73.Sun Yongqing,Liu Zhenbao,Wang Changjun,et al.Effect of Ncontent on mechanical properties and microstructure of 0Cr16Ni5Mo martensitic stainless steel[J].Heat Treatment of Metals,2019,44(3):69-73.
[12]Florian Mansfeld,Keith B Oldham.A modification of the Stern-Geary linear polarization equation[J].Corrosion Science,1971,11(10):787-796.
[13]钟佩文,方亮,胡佳,等.铝合金表面化学镀Ni-Co-P/SiC复合镀层的组织与性能研究[J].表面技术,2013,42(4):47-51.Zhong Peiwen,Fang Liang,Hu Jia,et al.Study on the microstructure and properties of electroless Ni-Co-P/SiC composite coatings on Al alloys[J].Surface Technology,2013,42(4):47-51.
[14]Lu Y C,Bandy R,Clayton C R,et al.Surface enrichment of Nitrogen during passivation of a highly resistant stainless steel[J].Journal of the Electrochemical Society,1983,130(8):1774-1776.
[15]Grabke H J.The role of nitrogen in the corrosion of iron and steels[J].ISIJ International,1996,36(7):777-786.
[16]崔大伟,曲选辉,李科.高氮低镍奥氏体不锈钢的研究进展[J].材料导报,2005,12(12):64-67.Cui Dawei,Qu Xuanhui,Li Ke.Research progress in high-nitrogen low-nickel austenitic stainless steel[J].Materials Review,2005,12(12):64-67.