Hot Metal and Flames
Hot objects making contact with the skin or eyes, or flames impinging on unprotected areas are responsible for what are known as 'dry' burns causes can include:
- Preheated or welded components, which may be very hot for some time before or after welding.
- Spatter and sparks emitted during welding.
The degree of burn from these sources depends on the temperature, the duration of contact, the area of contact, and the speed of application of first aid or medical intervention.
Most of the sources mentioned so far are fairly obvious as you can see and often feel the effect almost immediately, but perhaps one area which gets overlooked most often is radiation from the electric welding arc.
The severity of an isolated injury is related to the power of the arc, the distance from the arc, and the duration of exposure.
Electrical burns are caused when electricity of sufficient current and voltage passes through the body.
Liquid nitrogen, oxygen, and all other liquid gases, and solid CO2, can cause severe damage due to exposure to extreme cold, and these are known as 'cold' burns.
The most likely source of chemical burns are acids or caustic solutions, which are used in pre-treatment or cleaning shops to remove grease and dirt, or in analytical laboratories which are used for etching welds.
Lasers produce parallel beams of visible light, are sources of intense heat and will burn.