Abstract： AS 1627.4:2005 pdf download.Metal finishing-Preparation and pretreatment of surfaces Part 4: Abrasive blast cleaning of steel. 1.3.14 Grit Particles that are predominantly angular, that have fractured faces and sharp edges and that are less...

AS 1627.4:2005 pdf download.Metal finishing-Preparation and pretreatment of surfaces Part 4: Abrasive blast cleaning of steel.

1.3.14 Grit

Particles that are predominantly angular, that have fractured faces and sharp edges and that are less than half-round in shape.

1.3.15 High-carbon cast-steel grit

A metallic blast cleaning abrasive obtained by crushing high-carbon cast-steel shot into sharp-edged angular particles.

1.3.16 Ilmenite

Natural occurring mineral sand which is separated, dried and sieved and prepared for use as a blast cleaning abrasive.

1.3.17 Preparation classes

Classification describing the quality of preparation achieved by a method of surface cleaning.

1.3.18 Profile

See ‘Surface profile’.

1.3.19 Profile comparator

See ‘Surface profile comparator’.

1.3.20 Rust grades (Initial rust grades)

Classification describing the initial amount of mill scale and rust on a steel surface before any surface preparation has taken

place.

1.3.21 Spot (Selective) blasting

The abrasive blast cleaning of a previously coated surface to produce areas of bare exposed metal and areas of brush-blasted

surface.

1.3.22 Shot

See ‘Cast steel shot’.

1.3.23 Slag

A metal silicate abrasive manufactured by granulation in water, drying and sieving.

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