1.0 Aluminium

Hazards/effects	Measures/regulations
Repair stage 1: (replacement of bolted components, dent removal) Repair stage 2: (repairs with bonding and riveting)	When a vehicle outer skin is ground, aluminium dust accumulates in small amounts. This dust can be removed with conventional exhaust extraction unit.
Repair stage 3: (repairs with welding) Explosion hazard due to high concentration of fine aluminium dust. Arising e.g. during straight-through grinding of coated components in the base material and large-surface grinding of bright-finish components. Explosion hazard due to swirling up of fine aluminium dust in cavities. Created by the necessary, thorough cleaning of machining surfaces and tools before and after machining aluminium.	Avoid high concentration of fine aluminium dust by means of continuous extraction. Use explosion-proof exhaust extraction unit Do not use compressed air when cleaning the workbay. Avoid swirling up dust when cleaning the workbay.
Spontaneous combustion of fine aluminium dust when ignition and fire sources are drawn in. E.g.: hot swarf, grinding sparks, cigarettes, etc.	Do not operate ignition and fire sources in the intake area of exhaust extraction unit.