Turbidimetric Spectroscopy for the Evaluation of Metalworking Fluids Stability
Turbidimetric Spectroscopy for the Evaluation of Metalworking Fluids Stability
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DOI：
10.1080/10402004.2011.653871
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发表时间：
2012-01-01
影响因子：
2.1
通讯作者：
Guardani, Roberto
中科院分区：
文献类型：
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作者：
Glasse, Benjamin;Fritsching, Udo;Guardani, Roberto
作为金属加工液的水包油(O/W)乳状液的稳定性是整个金属加工过程经济和环境平衡的关键因素，因为使用过的和破碎的液体必须回收或处理。在这项研究中，评估了紫外光和可见光范围内的浊度光谱检测金属加工液失稳的能力。通过添加氯化钙来实现不稳定，从而实现加速老化，从而导致聚合、乳状化和完全乳状液分离。使用由光学探头组成的在线测量的光谱浊度计来监测在去离子水中体积浓度为5%的金属加工液的稳定性。还通过测量后向散射光和透射光的垂直分布来监测不稳定。将这种离线测量系统的结果与在线光谱传感器的结果进行了比较，表明后者可以提供关于乳化液失稳的本地实时信息，从而能够采取控制行动。
The stability of oil-in-water (O/W) emulsions used as metalworking fluids is a key factor for the economical and environmental balance of the entire metalworking process because used and broken fluids must be recycled or disposed. In this study, the ability of turbidimetric spectroscopy in the ultraviolet and visible light range to detect metalworking fluids destabilization was evaluated. Destabilization was achieved by adding calcium chloride, thus achieving accelerated aging, which leads to coalescence, creaming, and complete emulsion separation. The stability of the metalworking fluids at 5% volumetric concentration in deionized water was monitored using a spectroscopic turbidimeter composed of an optical probe for in-line measurements. Destabilization was also monitored by measuring the vertical profile of backscattered and transmitted light. The results of this offline measurement system were compared with those from the in-line spectroscopic sensor, indicating that the latter can provide local, real-time information on emulsion destabilization, thus enabling control actions.