Performance of dissimilar metal Self-Piercing Riveting (SPR) joint and coating behaviour under corrosive environment

H. R. Kotadia, A. Rahnama, I. R. Sohn, J. Kim, S. Sridhar

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The present paper investigates the effect of corrosive environments on the degradation and mechanical properties of Self-Piercing Riveting (SPR) joints between dissimilar metals. The investigations were carried out on a lap-shear joint of 5182 aluminium with pure zinc (GI), and a zinc––aluminium––magnesium (ZM or PosMAC ® 1.5) coated 590DP steel. The experimental results show that corrosion significantly influences the lap shear performance and failure mechanism of the joint depends on the type of coating and pre-treatment with and without primed (80% zinc, 10% aluminium). Detailed microstructural analysis of the SPR specimen and coating reveal the actual mechanism for mechanical property degradation. In ZM coated steel the formation of Mg 2+ and Al 3+ ions delay transformation of basic zinc salts to ZnO, and thereby retard the rate of corrosion. The experimental evidence supports the proposition that ZM coated steels have four-times superior corrosion resistance compared to zinc-coated steels.

Original languageEnglish (US)
Pages (from-to)259-270
Number of pages12
JournalJournal of Manufacturing Processes
Volume39
DOIs
StatePublished - Mar 2019
Externally publishedYes

Keywords

  • 590DP steel
  • Aluminium
  • Corrosion
  • Dissimilar material joining
  • Self-Pierce Rivet

ASJC Scopus subject areas

  • Strategy and Management
  • Management Science and Operations Research
  • Industrial and Manufacturing Engineering

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