Abstract: |
Fumes emitted during welding are more and more a concern in workshops. In the case of stainless steel welding, the fumes contain hexavalent chromium (CrVI) content to a very low level by replacing all the sodium and potassium compounds present in the coating by lithium compounds however, up to now such products were never commercialised due to their poor operative weldability and the brittleness of the coatings. That is no more the case thanks to a judicious choice of the raw materials entering in the constitution of the products. A new range of stick electrodes appears on the market offering a solid and resistant coating and very good operative weldability. These electrodes which combine a decrease of the fume emission rate (divided by 2) and a decrease of the hexavalent chromium in the fumes, allow to devide by 8 the generation of CrVI. Similarly, new flux cored wires also make it possible to lower the CrVI content without sacrificing the operative performances.
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