G - Aluminium glossary

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Galvanic corrosion

‘Galvanic corrosion’ is also referred to as ‘contact corrosion’. It can occur when two metals are joined electrically via an electrolyte. The less...

Gas porosity

The term ‘gas porosity’ refers to the hollow spaces in castings that form during the cooling and solidification of the molten metal; it is caused by...

Gating and feeding techniques

Gating is the term used to describe all measures associated with a carefully designed and dimensioned gating system for the casting process. The...

Glass bead procedure (Ballotini Method)

The glass bead procedure is a surface-treatment, in which the surface is irradiated under pressure with granulate material of little glass beads....

Grain-refinement hardening

Grain-refinement hardening is a process used to increase the strength of a material. Grain refinement produces more grain boundaries, which in turn...

Granules

Granules are solid or hollow “droplets” that are produced by the solidification of molten metal.

Grit

Aluminium grit consists of small, granular particles with a diameter of 0.4 to 3 mm. Grit is produced either by shredding foil or the solidification...