Morphological study of silver corrosion in highly aggressive sulfur environments

Daniel Minzari, Morten Stendahl Jellesen, Per Møller, Rajan Ambat

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A silicone coated power module, having silver conducting lines, showed severe corrosion, after prolonged use as part of an electronic device in a pig farm environment, where sulfur containing corrosive gasses are known to exist in high amounts. Permeation of sulfur gasses and humidity through the silicone coating to the interface has resulted in three corrosion types namely: uniform corrosion, conductive anodic filament type of Ag2S growth, and silver migration with subsequent formation of sulfur compounds. Detailed morphological investigation of new and corroded power modules was carried out, and possible theoretical explanation for various corrosion mechanisms has been attempted.
Original languageEnglish
JournalEngineering Failure Analysis
Volume18
Issue number8
Pages (from-to)2126-2136
ISSN1350-6307
DOIs
Publication statusPublished - 2011

Keywords

  • Coating failures
  • Electronic-device failures
  • Corrosion
  • Failure analysis

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