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OUYANG Minghui, LIU Huanan, YE jixuan. Effect of Alloying Elements on Corrosion Resistance of Foundry Fe-Cr Ferritic Stainless Steels in Concentrated Sulfuric Acid[J]. Corrosion & Protection, 2017, 38(10): 761-766. DOI: 10.11973/fsyfh-201710005
Citation: OUYANG Minghui, LIU Huanan, YE jixuan. Effect of Alloying Elements on Corrosion Resistance of Foundry Fe-Cr Ferritic Stainless Steels in Concentrated Sulfuric Acid[J]. Corrosion & Protection, 2017, 38(10): 761-766. DOI: 10.11973/fsyfh-201710005
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Effect of Alloying Elements on Corrosion Resistance of Foundry Fe-Cr Ferritic Stainless Steels in Concentrated Sulfuric Acid

  • The Institute of Xuanda Corrosion-Resistant Special Metals of Zhejiang Province, Yongjia 325105, China

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  • Received Date: March 19, 2016
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    • Abstract
  • The effects of alloying elements on the corrosion behavior of foundry Fe-Cr ferritic stainless steels in concentrated sulfuric acid were studied by electrochemical techniques, immersion corrosion and energy dispersive spectroscopy (EDS). The results show that the corrosion resistance of Fe-Cr alloys in concentrated sulfuric acid improved with the increase of Cr content. However, the single Cr alloyed Fe-Cr alloy was unable to reach self-passivation in 98% H2SO4 at 60℃. Mo addition enhanced the corrosion resistance and promoted the passivation and self-passivaiton of Fe-Cr25-Mo alloys. Elements Ni and Cu can also promoted the passivation and self-passivation of Fe-Cr25Mo2 alloys, whereas Ti and Nb only had a little influence on the passivation.
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