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Technical Information

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Affinity for plastics

Elsewhere, anodising as a preparation for various paint systems is well-established. But the ability of anodised aluminium to bond strongly to plastic is now allowing engineers to produce complex, light-weight components with the metal seamlessley integrated into the design.

Everything from complicated plastic roof mouldings with aluminium shouldering the burden of wear and rigidity, to relatively simple plastic air-intakes that rely on the metal for cosmetic high definition appearance, make use of aluminium.

The intimate relationship possible between the two materials has also been responsible for much of the growth in replacing brass and steel components with plastic mouldings containing anodised aluminium thread forms, bearing surfaces etc: fuel pumps for example. Advances in resin technology have helped make the most of the metal in this respect.

Such combined mouldings are becoming increasingly common-place in the automotive industry where aluminium can be anodised to provide corrosion resistance, colour matching and bondability in the same operation. But many other areas of manufacturing are still underusing these aluminium/anodising advantages.