Hexavalent chromium compound
Hexavalent chromium is a toxic, carcinogenic substance that forms during arc welding of high-alloy stainless steels. It requires strict protective measures and extraction.
Physicochemical mechanism
Hexavalent chromium is a high oxidation state of chromium that forms through the reaction of chromium with oxygen in the air. This oxidation can occur during arc welding of stainless steels, especially when the weld pool is not well shielded or when deoxidation is insufficient.
Metallurgical relevance & welding risks
The release of hexavalent chromium can cause serious health problems, including cancer. It is especially dangerous for the respiratory tract and skin. Without proper protective measures and extraction, it can concentrate in the air and endanger workers' health.
Shop practice & action items
To avoid hexavalent chromium, strict protective measures must be followed when arc welding high-alloy stainless steels. These include:
• Using deoxidizers in the weld pool
• Regularly cleaning and maintaining the weld pool
• Using high-efficiency fume extraction systems
• Wearing protective clothing (face masks, gloves, clothing)
• Performing air quality measurements in the work area