Which solution is preferred for dealing with toxic air contaminants caused by surface coatings during welding?

The preferred solution for dealing with toxic air contaminants caused by surface coatings during welding is the substitution of crimping/joining processes. This option addresses the issue at its source by minimizing or eliminating the use of harmful materials that can release toxic contaminants into the air during the welding process. By opting for alternative methods that do not require surface coatings known to be hazardous, the risks associated with toxic exposure can be greatly reduced.

This proactive approach not only protects the workers' health but is also beneficial for the environment by reducing overall emissions of harmful substances. In contrast, while increased ventilation, use of masks, and dust extraction systems can help mitigate exposure after the fact, they do not eliminate the primary source of contamination. Such options may provide temporary solutions but do not address the fundamental concern of the materials being used. Therefore, substitution is ultimately the most effective method for promoting long-term safety in the workplace.