Journal of Thermal Spray Technology

, Volume 13, Issue 4, pp 503–507 | Cite as

Corrosion behavior in boiling dilute HCI solution of different ceramic coatings fabricated by plasma spraying

  • Dianran Yan
  • Jining He
  • Xiangzhi Li
  • Yanchun Dong
  • Jianxin Zhang
  • Yangai Liu
Technical Note

Abstract

An Al2O3 ceramic coating (A), a 13 wt.% TiO2-Al2O3 (13TA) composite ceramic coating, and a Ni-Al-13wt.%TiO2-Al2O3 (NA-13TA) gradient composite ceramic coating were prepared on Q235 steel by plasma spraying. The corrosion behavior of samples sprayed with these coatings in a boiling 5% HCl solution was investigated. It was shown that an A ceramic coating and a 13TA composite ceramic coating were destroyed after immersion for 17 and 23 h, respectively. The NA-13TA gradient composite ceramic coating was still sound after 14 days of immersion. The corrosion resistance of samples with the NA-13TA gradient composite ceramic coating was sharply improved due to the decreased amount of connected pores in the coating. The corrosion of the sample sprayed with the gradient ceramic coating included the partial corrosion of the surface ceramic coating and the interlayer coatings. The corrosion weight loss depended on the degree of open porosity.

Keywords

ceramic coating corrosion mechanism gradient coating plasma spraying 

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Copyright information

© ASM International 2004

Authors and Affiliations

  • Dianran Yan
    • 1
  • Jining He
    • 1
  • Xiangzhi Li
    • 1
  • Yanchun Dong
    • 1
  • Jianxin Zhang
    • 1
  • Yangai Liu
    • 2
  1. 1.School of Materials Science and EngineeringHebei University of TechnologyTianjinPeoples Republic of China
  2. 2.School of Materials Science and EngineeringTsinghua UniversityPeople’s Republic of China

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