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Influence of boron concentration on the corrosion resistance of high boron white cast iron to liquid zinc bath

  • Shengqiang Ma
  • , Jiandong Xing
  • , Dawei Yi
  • , Jianjun Zhang
  • , Shengchao Ma
  • , Guofeng Liu
  • Xi'an Jiaotong University
  • Chang'an University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The influence of boron concentration on corrosion resistance of high boron white cast iron dipped into a pure liquid zinc bath at 460°C was investigated. The results reveal that high boron white cast iron containing 3.5 wt.%B exhibits excellent corrosion resistance due to the dense continuous netlike or parallel Fe2B phase which hinders the Fe/Zn interface reaction. The corrosion rate decreases significantly when the boron concentration increases, but the corrosion rate declines slightly when the boron concentration exceeds 3.5wt.%. EDS results indicate the coarse and compact δ phase generated near the matrix and a large amount of massive and blocky ζ phase occurred close to the liquid zinc. The corrosion process includes Fe/Zn interface reaction and the spalling and fracture of Fe2B. The failure of Fe2B is mainly caused by the microcrack of phase transformation.

Original languageEnglish
Title of host publicationScience and Processing of Cast Iron IX
PublisherTrans Tech Publications Ltd
Pages219-224
Number of pages6
ISBN (Print)9780878492275
DOIs
StatePublished - 2011
Event9th International Symposium on Science and Processing of Cast Iron, SPCI-9 - Luxor, Egypt
Duration: 10 Nov 201013 Nov 2010

Publication series

NameKey Engineering Materials
Volume457
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

Conference9th International Symposium on Science and Processing of Cast Iron, SPCI-9
Country/TerritoryEgypt
CityLuxor
Period10/11/1013/11/10

Keywords

  • Corrosion
  • High boron white cast iron
  • Interface reaction
  • Liquid zinc
  • Microcrack

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