top of page

                                                               Outsmart corrosion –                                                10.04.2022

a key challenge for dissimilar refill friction stir spot welding

In a bid to enhance the corrosion resistance of dissimilar refill friction stir spot welding (RFSSW) joints between aluminum and steel, a new strategy employing Dupont Betamate 1822 sealant has been implemented as detailed in D 1.4 . This innovative approach aims to address the potential vulnerability of such joints to corrosion, which can lead to structural integrity issues and reduced longevity.

The use of Betamate 1822 sealant in these joints provides several key benefits. Firstly, it fills any imperfections in the RFSSW joint, enhancing joint integrity and strength. Additionally, the sealant forms a durable protective barrier, safeguarding the joint against corrosive elements and prolonging its service life. Moreover, the sealant offers excellent adhesion to both aluminum and steel, ensuring compatibility with dissimilar materials used in the shock tower and B-pillar body structure application.

lap shear-specimens

Example of lap shear- specimens with sealant application

RFCS.png
EU_flag_1.png

This project has received funding from the Research Fund for Coal and Steel, a programme managed by the European Commission, supporting research in the coal and steel sectors in Europe under grant agreement No. 101034068. 

© 2025 Stir4Steel

Facts and Figures

  • Start date:     1st of September 2021

  • Duration:       36 months

  • EC Funding:  EUR 1.17 M

bottom of page