Enhancing the antimicrobial properties of borates in coolant fluids

Abstract

Studied the effects of C10H16O8N2 ethylenediaminetetraacetic acid (EDTA) and its C10H14O8N2Na2 disodium salt (trilon B) on the antimicrobial properties of lithium monoborate (LiBO2), sodium (NaBO2) and potassium (KBO2) in 3% emulsion coolant «Ukrinol-1». Established that the listed monoborates have antimicrobial properties in 3% emulsion coolant «Ukrinol-1». The addition of EDTA and trilon B separately at concentration of 1 g/l, enhances almost 2 times the antimicrobial activity of monoborates in the coolant emulsion. Thus, the addition of 30 g/l of sodium monoborate in combination with 1 g/l of EDTA increases the service life of 3% emulsion of «Ukrinol-1» coolant fluid up to 87 days. In combination with trilon B the term of the antimicrobial action of borates in 3% emulsion of the coolant «Ukrinol-1» increases to greater extent than in the presence of EDTA and its service life increases up to 110 days. All this allows us to recommend the studied composition as the antimicrobial additive to improve the sanitary and hygienic working conditions of machine workers and increasing the service life of the 3% emulsion coolant «Ukrinol-1» used for machining of metals.