Welders wear protective clothing, including
light and thin leather gloves and protective long sleeve shirts with high
collars, to avoid exposure to strong ultraviolet light. Due to the absence of
smoke in GTAW, the electric arc light is not covered by fumes and particulate
matter as in stick welding or shielded metal arc welding, and thus is a great
deal brighter, subjecting operators to strong ultraviolet light. The welding
arc has a different range and strength of UV light wavelengths from sunlight,
but the welder is very close to the source and the light intensity is very
strong. Potential arc light damage includes accidental flashes to the eye or
arc eye and skin damage similar to strong sunburn. Operators wear opaque
helmets with dark eye lenses and full head and neck coverage to prevent this
exposure to UV light. Modern helmets often feature a liquid crystal-type face
plate that self-darkens upon exposure to the bright light of the struck arc.
Transparent welding curtains, made of a polyvinyl chloride plastic film, are
often used to shield nearby workers and bystanders from exposure to the UV light
from the electric arc.
Welders are also often exposed to dangerous
gases and particulate matter. While the process doesn't produce smoke, the
brightness of the arc in GTAW can break down surrounding air to form ozone and
nitric oxides. The ozone and nitric oxides react with lung tissue and moisture
to create nitric acid and ozone burn. Ozone and nitric oxide levels are
moderate, but exposure duration, repeated exposure, and the quality and
quantity of fume extraction, and air change in the room must be monitored.
Welders who do not work safely can contract emphysema and oedema of the lungs,
which can lead to early death. Similarly, the heat from the arc can cause
poisonous fumes to form from cleaning and degreasing materials. Cleaning
operations using these agents should not be performed near the site of welding,
and proper ventilation is necessary to protect the welder.
More details, please feel free to contact us by email sales@chinatungsten.com.