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首页> 外文期刊>Corrosion Engineering, Science and Technology >Corrosion properties of nickel free austenitic stainless steels in 0·5M H2SO4 and 0·5M H2SO4 plus 0·4M NaCl
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Corrosion properties of nickel free austenitic stainless steels in 0·5M H2SO4 and 0·5M H2SO4 plus 0·4M NaCl

机译：无镍奥氏体不锈钢在0·5M H 2 SO 4 和0·5M H 2 SO 4 加0·4M NaCl

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摘要

The corrosion behaviour of four nickel free austenitic stainless steels were investigated in 0·5M H2SO4 and 0·5M H2SO4 plus 0·4M NaCl solutions by means of potentiodynamic and potentiostatic anodic polarisation testing. The performances of the nickel free alloys are compared to those of an experimental intermediate nickel alloy (4%Ni) and a standard AISI 304 steel grade. Once passivity was reached all alloys displayed similar current densities ip in 0·5M H2SO4, independent from alloying. Mo and Cu were shown to be beneficial in decreasing the active dissolution currents and icrit values. The commercial AISI 304 steel displayed superior resistance to pit initiation during potentiodynamic testing, and AISI 304 steel displayed the highest Epit value of all alloys tested. When tested potentiostatically the N and Mo alloyed nickel free alloys showed excellent resistance to pit initiation and growth. The dominant effect of N was associated with repassivation of incipient pits, while Mo appeared to act at an earlier stage, suppressing initiation.
机译：研究了四种无镍奥氏体不锈钢在0·5M H 2 SO 4 和0·5M H 2 SO 下的腐蚀行为> 4 加上0·4M NaCl溶液，通过电位动力学和恒电位阳极极化测试。将无镍合金的性能与实验中间镍合金（4％Ni）和标准AISI 304钢等级的性能进行了比较。一旦达到钝化度，所有合金在0·5M H 2 SO 4 中的电流密度i p 相似，与合金化无关。钼和铜被证明对降低活性溶解电流和i crit 值有利。商用AISI 304钢在电位动力学测试中表现出优异的抗点蚀能力，而AISI 304钢在所有测试合金中均表现出最高的E pit 值。当进行恒电位测试时，N和Mo合金化的无镍合金显示出优异的抗坑蚀和生长性能。 N的主要作用与初期凹坑的钝化有关，而Mo似乎在较早阶段起作用，抑制了引发。

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  • 来源
    《Corrosion Engineering, Science and Technology》 |2009年第5期|394-400|共7页
  • 作者

    Milititsky M.; Verhaege M.; de Wispelaere N.; Peguet L.; Ferreira J.Z.; H?nninen H.;

  • 作者单位

    Department of Metallurgy, Ghent University, Technologiepark 903 B-9052 Zwijnaarde (Ghent), Belgium, Email: marcio.milititsky@ugent.be;

    Department of Metallurgy, Ghent University, Technologiepark 903 B-9052 Zwijnaarde (Ghent), Belgium;

    Arcelor Mittal Research Institute Ghent, OCAS, John Kennedylaan 3, B-9060 Zelzate, Belgium;

    UGINE-ALZ Research Centre (Arcelor/Mittal group), BP 15, 62330 Isbergues, France;

    Materials Department, Universidade Federal do Rio Grande do Sul, PPGEM, Av. Bento Gon?alves 9500, Setor 4, Prédio 74, 91501-970, Porto Alegre, Brazil;

    Laboratory of Engineering Materials, Helsinki University of Technology, Puumiehenkuja 3, FIN-02150, Espoo, Finland;

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