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Metalworking Fluids and Microbial Exposure Risks

Metalworking fluids (MWFs) are used to reduce heat and friction and to remove metal particles in industrial machining and grinding operations. There are numerous formulations, ranging from straight oils (such as petroleum oils) to water-based fluids, which include soluble oils, and semi-synthetic and synthetic fluids. When MWFs are used, a primary concern is the presence of contaminants that encourage the growth of bacteria and fungi. The Occupational Safety and Health Administration (OSHA) reports that millions of workers engaged in the manufacture of automobiles, farm equipment, aircraft, heavy machinery, and other hardware are exposed to machining fluids. The agency also goes on to warn that metalworking fluids can cause adverse health effects through skin contact with contaminated materials, spray, or mist, and through inhalation from breathing MWF mist or aerosol. Regarding exposure risks, OSHA offers the following words of caution: While MWFs are used by many workers safely, problems can develop when good hygiene practices are not followed or when fluids are not properly managed or maintained. Major health concerns of improperly managed fluids or when good hygiene practices are not followed include skin irritation, allergic contact dermatitis, irritation of the eyes, nose and throat, and, occasionally, breathing difficulties such as bronchitis and asthma. Although rare, some workers have contacted hypersensitivity pneumonitis (HP) from improperly managed fluids. HP is an allergic type reaction in the lungs that may be caused by exposure to certain microbial products. HP is marked by chills, fever, shortness of breath and a deep cough - similar to a cold that will not go away. To help protect workers from exposure risks, potential hazards due to MWFs are addressed in specific OSHA standards for general industry, maritime, and construction. These are just a few of the many things to know about metalworking fluids and occupational exposure risks. To learn more about this or other industrial hygiene, indoor air quality, environmental, health, or safety issues, please visit the websites shown below. Clark Seif Clark https://www.csceng.com EMSL Analytical, Inc. https://www.emsl.com LA Testing https://www.latesting.com Zimmetry Environmental https://www.zimmetry.com CTSI https://www.ctsiweb.com Healthy Indoors Magazine https://www.healthyindoors.com