Corrosion behaviour of direct current and active screen plasma carburised AISI 316 stainless steel in boiling sulphuric acid solutions

SC Gallo, Hanshan Dong

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Active screen plasma is a recently developed plasma surface alloying technique, which has shown potential for addressing some drawbacks associated with conventional direct current plasma processes. In this study, the corrosion performance of untreated, direct current and active screen plasma carburised AISI 316 was investigated by immersion in a boiling solution of sulphuric acid. The experimental results show that the corrosion behaviour of expanded austenite produced by low temperature plasma carburising is controlled by the type and density of surface defects; the corrosion properties of the active screen plasma carburised material are superior to that produced by direct current plasma because of the significantly reduced edge effect and surface defects; and the bias level used in the active screen carburising treatment has a profound effect on the corrosion performance of the material. Based on the experimental results, the corrosion mechanisms involved are discussed.
Original languageEnglish
Pages (from-to)8-16
Number of pages9
JournalCorrosion Engineering Science and Technology
Volume46
Issue number1
DOIs
Publication statusPublished - 1 Feb 2011

Keywords

  • Active screen
  • Corrosion
  • Austenitic stainless steel
  • Sulphuric acid
  • Plasma carburising

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