AFM and KPFM investigation of high strength aluminium brazing sheets

Research output: Contribution to conferencePosterResearch

External Organisational units

  • AMAG Austria Metall AG

Abstract

High strength aluminum brazing compounds used in car-cooler systems become susceptible to corrosion after brazing. An intermediate layer has to be inserted to separate the 4xxx filler-material from the 7xxx base-material. The effectivity of this layer in preventing corrosion was investigated using atomic force microscopy (AFM) and Kelvin probe force microscopy (KPFM). Samples were subjected to a simulated brazing cycle and exposed to a corrosive medium. The investigations revealed the presence of cathodic inclusions in the Al-matrix. Further, a line of up to 3 µm wide holes is formed at the transition between intermediate layer and base material.

Details

Original languageEnglish
Publication statusPublished - 2015
EventÖPG Jahrestagung 2015 - Technische Universität Wien, Vienna, Austria
Duration: 1 Sept 20154 Sept 2015

Conference

ConferenceÖPG Jahrestagung 2015
Country/TerritoryAustria
CityVienna
Period1/09/154/09/15