5. Automotive

5.1 Benefits and history of bonding

The first metal bonding operations in the automotive industry were the bonding of stiffeners to the inside of hoods, starting in 1954.

In the past, these stiffeners were spot-welded, but this had three disadvantages:
- multiple spot welding (dozens for a hood) required highly complex and expensive machines with dozens of electrodes to weld a hood on a chain in a single operation;
- the weld marks on the outer sheets meant that they had to be coated before painting to achieve a perfect surface finish;
- the welding points, more or less spaced out, didn't provide perfect stiffening, and the sheets...

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Automotive

The costs of the various types of adhesive are shown in table 1 .

...

(1) - - Catalogues et documentation technique Vantico (ex. Ciba-Geigy).
(2) - CLEARFIELD (M.M.), McNAMARA (D.K.), DAVIS (G.) - Surface Preparation of metals dans Adhesives and Sealants. - ASM international (1990).

Highlights of bonding applications in the aerospace and automotive sectors are shown in figures 1 and

Adhesives – Preparation of metal supports for laboratory test specimens. - NF T76-201 - 12-82
Structural adhesives – Permanent shear strength tests. - NF T76-122 - 05-85
Structural adhesives – Shear method for determining the stress-strain curve of an adhesive in a bonded...

(non-exhaustive list)

Suppliers of adhesives and related products for metal bonding
- VANTICO (ex CIBA-GEIGY): brands ARALDITE ^Ò (epoxy adhesives), EPOCAST ^Ò (syntactic adhesives and reinforcing pastes) EPIBOND ^Ò...