E - Aluminium glossary

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EAA

The European Aluminium Association (EAA) is a European organisation for the aluminium industry whose aim is to improve cooperation between its...

Edge bending

Edge bending is a deformation technology for plates/sheets, in which one part of the face is flapped over in respect to the rest of the sheet/plate.

Edge rolling

Edge rolling is a process that is used to bend large components. The work piece is rolled between two drive rolls and a pressure roll and thus bent....

Elastic modulus

The elastic modulus (or Young’s modulus) is a measure of how strongly a material deforms elastically under a given load.

Electrical conductivity

Electrical conductivity is a measure of the ability of materials to conduct electricity. Whether and to what extent a given material will conduct...

Electric-arc spraying

Electric-arc spraying is a thermal spraying process and it is used to apply protective metal coatings to aluminium alloys. Two spray wires with an...

Electrolysis

Electrolysis is the decomposition of an electrically conductive fluid (an electrolyte) by electric current.

Electroplating

Electroplating is a surface treatment process. It is an electrolytic process in which a metallic coating deposits out of a solution onto a material....

Electrostatic powder coating

Electrostatic powder coating and the closely related tribostatic powder coating process are enamelling processes. The powder to be applied is placed...

Embossing

‘Embossing’ is the term used to describe the rolling of aluminium strip with specially designed embossing rolls that raises or indents a design in...

Emissions

The term ‘emissions’ describes the discharge of pollutants in gaseous, liquid or solid form into rivers and lakes, the atmosphere or the soil. Under...

Enamelling

Enamelling is the application of organic coatings to a metal. Amongst other things, enamelling ensures good corrosion protection, which is also...

Erosion

Erosion is the wearing away and removal of layers of the earth’s crust, especially by water. Metals can be attacked in a similar way.

Erosion-corrosion

Two phenomena occur during erosion corrosion: the mechanical removal of material from the metal surface via a medium such as water (erosion) and...

Etched foil

An etched foil is a foil that has been roughened in a chemical or electrochemical process. The objective of the treatment is to increase the surface...

Eutectic

When an alloy melt cools from the molten to the solidified state, decreasing temperature first results in crystallisation to a single crystal form,...

Eutectic composition

Alloys have a eutectic composition if this allows simultaneous crystallisation of both forms of crystals, namely alpha solid solution and crystals of...

Exfoliation corrosion

The term ‘exfoliation corrosion’ is used to describe attack that occurs exclusively in the zones of segregation in an aluminium component. The...

Extrusion

Extrusion is a forming process in which profiles are produced using an extrusion press. An extrusion billet is forced through a shape-forming tool, a...

Extrusion bending

Extrusion bending is a special processing technique that is particularly suitable for small production runs. The work piece is compressed directly or...

Extrusion billet

Extrusion billets are a form of cast ingots and are the starting material for extrusion. They can be produced in various sizes and from different...

Extrusion effect

A peculiar feature of forgings is that the grains parallel to the fibres have greater strength than those in the transverse direction. With profiles...

Extrusion over a mandrel

Extrusion over a mandrel is a process for making seamless hollow profiles (tubes). A fixed or moving mandrel is used to produce the internal shape of...