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Posts Tagged ‘compatibility of aluminium’

The use of aluminium in building construction involves its close association with many other materials. Aluminium is compatible with most, but there are a few which require some special attention.

Metallic building materials
Chromium plate

Providing the plating is correctly applied there is no acceleration of attack on aluminium.

Copper and copper alloys

Contact between copper and aluminium will result in severe corrosion. Where joining these metals is unavoidable always use plastic ferrules and washers. Water must not be allowed to drip from copper and its alloys onto aluminium.

Iron and steel

For relatively clean rural and urban atmospheres the contact areas of steel should be painted with a bituminous or red oxide / zinc chromate paint. Existing steelwork should have any rust removed by scratch brushing. Lead-free paint should be used on any new steelwork that will be in contact with aluminium.

In extremely corrosive environments, a nonabsorbent gasket, such as PVC or similar should be used in addition to paint.

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