The Lubricity Analysis of Cutting Fluid Emulsions

AUTOR(ES)

Santos, Erinéia da Silva, Camargo, Ana Paula de Paula, Faria, Edália Azevedo de, Oliveira Junior, Francisco Adriano Ferreira de, Alves, Salete Martins, Barros Neto, Eduardo Lins de

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

2017

RESUMO

The new generation of cutting fluids should have some characteristics, such as low toxicity and biodegradability. A bio-cutting fluid emulsion are an excellent option because they present those properties, as well as good mechanical performance. The present study aims to investigate the lubricity of O/W emulsions (cutting fluid emulsion), varying the concentration of anionic surfactant (1%, 2.5% and 5%) and epoxidized oil (5%, 10%, 15%, 20% e 25%). A sunflower oil was chemically modified by epoxidation reaction, then its viscosity, iodine and oxirane index, density, and acidity were characterized. The performances of the emulsions were evaluated using a tribometer HFRR (High Frequency Reciprocating Rig), under hydrodynamic lubrication conditions. The ball wear scars were analyzed using an optical microscopy. The results showed that a low concentration of surfactant promote friction and wear reduction. Based on the tribological performance, the emulsions with 5% and 10% of epoxidized oil are more suitable.

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