title: Identification and measurement of dirt composition of manufactured steel plates using laser-induced breakdown spectroscopy.
abstract: Laser-induced breakdown spectroscopy (LIBS) was used for the characterization of the main components of the surface residual dirt produced in cold-rolled steel plates as a consequence of the manufacturing stages. At laser fluences between 0.05 J/cm(2) < F < 0.30 J/cm(2), dirt ablation takes place without any contribution from the substrate. Results show that the main components of the dirt are fine particles of Fe mostly homogeneously distributed in a thin layer of grease and soaps. In the primary stages of the manufacturing process carbon residuals can also be found. By measuring light emission from the lambda = 495.9 nm line of Fe(I) after laser ablation, we developed a real-time on-line method for the determination of the concentration of iron particles present in the surface dirt. The obtained results open new possibilities in the design of real-time instruments for industrial applications as a quality control of products and processes.
authors.affiliation: Centro de Investigaciones Opticas (CONICET-CIC) y Universidad Nacional de La Plata, Casilla de Correo 124, (1900) La Plata, Argentina.
authors.forename: Daniel J O
authors.initials: DJ
authors.lastname: Orzi
authors.forename: Gabriel M
authors.initials: GM
authors.lastname: Bilmes
mesh_terms: D004391:Dust / Q000032:analysis* / Q000517:prevention & control; D004866:Equipment Contamination / Q000517:prevention & control; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D008420:Manufactured Materials / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012987:Soil / Q000032:analysis*; D013057:Spectrum Analysis / Q000295:instrumentation* / Q000379:methods; D013232:Steel / Q000032:analysis* / Q000737:chemistry*
chemical_list: D004391:Dust; D012987:Soil; D013232:Steel