论文信息 - Optical measurement for the concentrations of the pickling acid with near infrared spectroscopy in steel making industry

Optical measurement for the concentrations of the pickling acid with near infrared spectroscopy in steel making industry

In the manufacturing process of stainless steel, it is essential to pickle the oxide layer of steel surface for high corrosion resistance and fine surface quality. Pickling liquor of stainless steel is commonly composed of mixed hydrofluoric and nitric acid. Real time monitoring of concentrations of each acid is crucial to optimize pickling process. It also reduces cost of production and decreases the generation of waste acid. We used non-contact near infrared spectroscopy technique and rapid analysis method, for the quantification of each acid in an on-line manner. Multivariate calibration such as partial least square regression method is employed for the better prediction results.

[1] Quansheng Chen,et al. Determination of total polyphenols content in green tea using FT-NIR spectroscopy and different PLS algorithms. , 2008, Journal of pharmaceutical and biomedical analysis.

[2] Ronei J. Poppi,et al. Application of mid infrared spectroscopy and iPLS for the quantification of contaminants in lubricating oil , 2005 .

[3] Hoeil Chung,et al. Near-Infrared Spectroscopy for Monitoring Wafer Etchant Solution Using a Teflon Tube , 2005, Applied spectroscopy.

[4] Hoeil Chung,et al. Improving prediction selectivity for on-line near-infrared monitoring of components in etchant solution by spectral range optimization. , 2008, Analytica Chimica Acta.

[5] James B. Callis,et al. Quantification of hydrofluoric acid species by chemical-modeling regression of near-infrared spectra , 1997 .

[6] Kaj Lindroos. Determination of free hydrofluoric and nitric acids in pickling bath liquors using a fluoride-selective electrode and alkalimetric titration , 1987 .