Progress on Cr(Ⅵ) in Stainless Steel Welding Fumes

In this paper, the related influencing factors, detection, control and generation mechanism of hexavalent chromium (Cr (Ⅵ) ) in stainless steel welding fumes were reviewed and analyzed. It was found that the proportion of amount of Cr (VI) in the whole Cr in the fumes increased with the increase of oxidation of welding shielding gas. The K and Na elements in welding consumables, having tendency to cause chemical reactions with CrO₄^2- and Cr₂O₇^2- to form stable Cr (Ⅵ) compounds, should be limited to a certain range. Furthermore, the solid-liquid extraction detection method has remarkable advantages of low cost, easy operation, and suitable for the quantitative detection compared with the solid species detection method.