Metallurgical and Materials Transactions A

, Volume 33, Issue 7, pp 1981–1989 | Cite as

Modification of 27Cr cast iron with alloying yttrium for enhanced resistance to sliding wear in corrosive media

  • Tiancheng Zhang
  • D. Y. Li


Yttrium has been found to be beneficial to the wear resistance of (Cr, Al)-containing alloys in corrosive environments. In this study, the performance of chill-cast 27Cr white iron alloyed with yttrium during sliding wear in different media, including tap water, dilute NaOH, and HNO3 solutions, was investigated. Compared to Y-free 27Cr cast iron, the Y-containing cast iron showed improved wear resistance. The study demonstrated that chill-cast 27Cr white iron containing 1 wt pct yttrium performed the best and that too much yttrium, however, deteriorated the material. In order to understand the beneficial role that yttrium played, mechanical properties of Y-containing and Y-free cast irons and their passive films were investigated. The electron work function, corrosion, and anodic polarization behavior of the materials were also studied. It was clarified that the beneficial role of yttrium was attributable to improved passivation capability with enhanced passive film. For comparison, sandcast 27Cr white iron was also investigated.


Material Transaction Yttrium Cast Iron Passive Film Electron Work Function 
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Copyright information

© ASM International & TMS-The Minerals, Metals and Materials Society 2002

Authors and Affiliations

  • Tiancheng Zhang
    • 1
  • D. Y. Li
    • 1
  1. 1.the Department of Chemical and Materials EngineeringUniversity of AlbertaEdmontonCanada

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