Optical Spectroscopy for Analysis and Monitoring of Metalworking Fluids

Johannes Kiefer* (Corresponding Author), Benedikt Seidel, Daniel Meyer

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

For various industrial manufacturing processes, water-based metalworking fluids (MWFs) are of high relevance due to their cooling and lubricating ability. They commonly form oil-in-water emulsions or solutions and hence their composition and stability is crucial for their performance in the metalworking process. To ensure a long service life of the MWF, intense monitoring is obligatory. However, examination techniques which display comprehensive and precise information about the actual state of the cooling lubricant in use are currently not available. The present study aims at testing the suitability of spectroscopic methods in terms of Fourier transform infrared, Raman, and laser-induced fluorescence spectroscopy for analyzing and monitoring MWFs. It is shown that all three techniques are capable of determining the initial composition, i.e., the ratio of water and concentrate. Fourier transform infrared provides the best performance regarding monitoring the state of the fluid over an extended period of time. The spectral signatures show distinct changes during a five-month service life in a technical environment.

Original languageEnglish
Pages (from-to)1790-1797
Number of pages8
JournalApplied Spectroscopy
Volume72
Issue number12
Early online date24 Jul 2018
DOIs
Publication statusPublished - Dec 2018

Keywords

  • Emulsion
  • metalworking fluid
  • laser-induced fluorescence
  • LIF
  • Raman
  • Fourier transform infrared
  • FT-IR
  • INFRARED-SPECTROSCOPY
  • OIL CONCENTRATION
  • IONIC LIQUID
  • EMULSIONS
  • GLUCOSE
  • SYSTEM

Cite this