When the temperature becomes conducive to microbial growth, they proliferate and emit a foul odor! An explanation of the smell of cutting oil and its causes.
Water-soluble cutting oils tend to increase in temperature as the weather warms from late May to mid-October, reaching a temperature range (20-40°C) that is conducive to the proliferation of microorganisms, which can lead to the release of unpleasant odors.
These microorganisms include aerobic bacteria, which thrive in the presence of air (oxygen), and anaerobic bacteria, which reproduce in the absence of air (oxygen), both of which feed on the same organic materials to grow.
Anaerobic bacteria reproduce more slowly than aerobic bacteria, but they produce a strong odor reminiscent of rotten eggs, which is the source of the unpleasant smell. Additionally, black mold, which prefers dark areas such as the bottom of tanks, can also develop at the boundary of the oil level in the tank.
Since anaerobic bacteria reproduce slowly, it is often observed that when machines are left idle for extended periods during factory holidays or long breaks, these anaerobic bacteria proliferate and fill the factory with unpleasant odors.
*For more details, please refer to the PDF document or feel free to contact us.*