Development of new surface treatments for the adhesive bonding of aluminum surfaces

Bi-functional water-soluble polymers have been investigated as bonding layers (BL) on aluminum surfaces to promote the adhesion of adhesives for structural bonding applications in the automotive sector. The BLs are located at the interface between two parts: the aluminum substrate and the adhesive (...

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Bibliographic Details
Published inInternational journal of adhesion and adhesives Vol. 117; p. 103006
Main Authors Layec, Justine, Ansart, Florence, Duluard, Sandrine, Turq, Viviane, Aufray, Maelenn, Labeau, Marie-Pierre
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.09.2022
Elsevier BV
Elsevier
Subjects
Adhesive bonding
Aluminum
Aluminum alloy
Automobile industry
Bonding layer
Engineering Sciences
Materials
Mechanical properties
Mechanical tests
Photoelectrons
Process parameters
Substrates
Surface treatment
Water soluble polymers
Weight reduction
X ray photoelectron spectroscopy
Mechanical properties
Bonding layer
Adhesive bonding
Surface treatment
Aluminum alloy
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Summary:Bi-functional water-soluble polymers have been investigated as bonding layers (BL) on aluminum surfaces to promote the adhesion of adhesives for structural bonding applications in the automotive sector. The BLs are located at the interface between two parts: the aluminum substrate and the adhesive (an epoxy-dicyandiamide). The formation and the morphology are studied mainly by transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Many process parameters have been investigated such as: i) long or short immersion time in the treatment baths containing the polymers, ii) formulation using three different concentrations. The performances of the BLs under these different operating conditions are evaluated via several mechanical tests: micro-scratch, three-point bending, single lap shear. Results were compared with results obtained with already existing products, launched for the same application, surface treatment prior to structural adhesive bonding of aluminum in transportation.
ISSN:0143-7496
1879-0127
DOI:10.1016/j.ijadhadh.2021.103006