A turbidimetric method for the rapid evaluation of MWF emulsion stability

J. Deluhery, N. Rajagopalan

Research output: Research - peer-reviewArticle

Abstract

The stability of metalworking emulsions is a critical characteristic impacting its usefulness as a lubricant and rust inhibitor. Loss of stability usually results in replacement of the fluid leading to both economic loss and environmental discharge. In this paper, the loss of stability caused by accumulation of hardness ions is examined by a turbidimetric method. The method is based on following the change in the wavelength exponent of the emulsions caused by changing particle size. The stability as determined by this method is compared to conventional testing based on phase separation over 24 h. The turbidimetric method is shown to be a more conservative estimate of emulsion stability. The simplicity of the method makes it useful for both product formulation and process control.

LanguageEnglish (US)
Pages145-149
Number of pages5
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume256
Issue number2-3
DOIs
StatePublished - Apr 22 2005

Fingerprint

emulsions
evaluation
Emulsions
rust fungi
lubricants
inhibitors
economics
hardness
exponents
formulations
fluids
estimates
products
wavelengths
ions
Phase separation
Discharge (fluid mechanics)
Process control
Lubricants
Hardness

Keywords

  • Metalworking fluid
  • Oil-in-water emulsions
  • Stability
  • Turbidity

ASJC Scopus subject areas

  • Colloid and Surface Chemistry

Cite this

A turbidimetric method for the rapid evaluation of MWF emulsion stability. / Deluhery, J.; Rajagopalan, N.

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 256, No. 2-3, 22.04.2005, p. 145-149.

Research output: Research - peer-reviewArticle

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