STUDIES ON BIODETERIORATION OF METAL WORKING FLUIDS

Of the twenty triazole compounds studied, benzotriazole, 5-chloro benzotriazole and tolyltriazole have very good antimicrobial properties in specialty lubricants tested, and this property was potentiated by EDTA.;Third part of the study showed that inhibitory properties of Dowicide A. Milidin TI-10 and Dowicil 75 were enhanced by filtering agents like cellulose in petroleum base products. On synthetic and semi-synthetic coolants bentonite, diatomaceous earth, and cellulose increased the activities of Proxel CRL, Dowicide A and Sodium Omodine. Only the inhibitory properties of Tris Nitro were reduced by the filtering agents in all three classes of coolants.;Final part of the study showed that mixing preservatives and cutting fluid concentrates, showed marked decrease in antimicrobial properties of the preservatives.;Second part of the study showed that of the thirty-three morpholine compounds studied methylene dimorpholine, N-aminomorpholine, N-(2-chloroethyl) morpholine, N-(aminopropyl) morpholine, 2-nitrobutyl morpholine and morpholine borane have good antimicrobial properties, but this activity was greatly reduced when morpholine compounds were mixed with formaldehyde releasers.