F - Aluminium glossary

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Filiform corrosion

Filiform corrosion is a form of corrosion that only occurs with metallic surfaces covered with an organic coating. It derives its name from the...

Flame spraying

Flame spraying is a special form of thermal spraying. The material being sprayed as a coating is heated to a temperature of 1750 to 3100 °C in an oxy...

Flocculant

Aluminium is used in the treatment of drinking water as a so-called ‘flocculant’ in order to tie up inorganic particles, bacteria and other organisms...

Fluoride

Fluorides are deleterious substances that are formed during fused-salt electrolysis by the decomposition of the cryolite flux; they have to be...

Foil

Aluminium foil is produced by rolling; it has a thickness of between 0.005 and 0.02 mm. It is impervious to vapours and light, is soft and flexible...

Forging

Forging is a massive-forming technique using hammering or pressing. It leads to a change in the cross-section of the material as a result of the...

Forgings

A forging is the name given to a work piece produced by forging. One differentiates between open-die and closed-die forgings depending on the type of...

Four-high stand

A four-high mill is a rolling mill with four rolls arranged above one another whereby both inner rolls, the so-called ‘working rolls’, are smaller...

Fretting corrosion

Fretting corrosion is a form of corrosion that results from friction i.e. from an additional mechanical stress. Most damage due to fretting corrosion...

Friction

Friction is the resistance that develops between two surfaces sliding over each other.

Fuel

Fuels are chemicals that are characterised by a high energy density and limited stability. The energy they contain can be released during a chemical...

Fused-salt electrolysis

Fused-salt electrolysis is a process developed independently by the French Héroult and the American Hall in 1886; alumina obtained from bauxite is...