Hexavalent Chromium Exposure During Stainless Steel Welding
Hexavalent chromium is a toxic, carcinogenic gas that forms during stainless steel welding through oxidation. It must be strictly extracted and respiratory protection must be followed.
Physicochemical mechanism
Hexavalent chromium is a highly toxic, carcinogenic compound of chromium in its hexavalent form. It forms during thermal joining of stainless steels through oxidation of chromium in the weld pool and during cooling of the weld.
Metallurgical relevance & welding risks
Hexavalent chromium can have serious health effects, including cancer. It can enter the body through the air and damage the lung tissue. If extraction or respiratory protection is insufficient, other organs can also be affected.
Shop practice & action items
To minimize hexavalent chromium exposure, technical extraction measures must be in place. This includes using high-quality fume extraction systems and ensuring effective air circulation in the shop. Also, respiratory protection like masks or face shields must always be worn, especially during prolonged or intense work. After welding, the weld area should be thoroughly extracted and cleaned.