Kinetics study of cold rolling lubricant degradation through advanced instrumental techniques

IF 1.8 4区 工程技术 Q3 ENGINEERING, CHEMICAL
Subho Chakraborty, Suvendu Sekhar Giri, Ashwin Pandit, Amarnath Bhagat, Ajay Kumar Jha
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引用次数: 0

Abstract

Research was focused on understanding the degradation kinetics of cold rolling oil used in the rolling mill at Tata Steel. Aged rolling oil leads to various surface defects. Ageing phenomenon is influenced through thermo-mechanical behaviour, oxidation, hydrolysis and presence of iron fines. Ageing of cold rolling oil in presence of iron fines was systematically performed at various temperature followed by thermo-mechanical wear tests. With variation in intensity of ageing, change in physico-chemical parameters and fatty acid distribution (FAD) within triglycerides could be observed. The impact of the controlled ageing on performance parameters like lubrication, evaporation kinetics and oxidative stability were also studied. Thermo-oxidative ageing depletes antioxidant concentration within the rolling oil resulting in rapid oxidation of unsaturated fats. This leads to rapid build-up of high molecular weight ingredients resulting in formation of fatty acid soaps or scum. The resultant scum negatively impacts the boundary lubrication and evaporation kinetics of rolling oil.

利用先进的仪器技术研究冷轧润滑油降解动力学
研究的重点是了解塔塔钢铁轧钢厂使用的冷轧油的降解动力学。老化的轧制油会导致各种表面缺陷。老化现象受热力学行为、氧化、水解和铁粉存在的影响。在不同的温度下系统地进行了冷轧油在铁粉存在下的老化,然后进行了热机械磨损试验。随着衰老强度的变化,可以观察到甘油三酯中理化参数和脂肪酸分布(FAD)的变化。研究了控制老化对润滑、蒸发动力学和氧化稳定性等性能参数的影响。热氧化老化消耗轧制油中的抗氧化剂浓度,导致不饱和脂肪的快速氧化。这导致高分子量成分的快速积累,从而形成脂肪酸皂或浮渣。由此产生的浮渣对轧制油的边界润滑和蒸发动力学产生不利影响。
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来源期刊
Lubrication Science
Lubrication Science ENGINEERING, CHEMICAL-ENGINEERING, MECHANICAL
CiteScore
3.60
自引率
10.50%
发文量
61
审稿时长
6.8 months
期刊介绍: Lubrication Science is devoted to high-quality research which notably advances fundamental and applied aspects of the science and technology related to lubrication. It publishes research articles, short communications and reviews which demonstrate novelty and cutting edge science in the field, aiming to become a key specialised venue for communicating advances in lubrication research and development. Lubrication is a diverse discipline ranging from lubrication concepts in industrial and automotive engineering, solid-state and gas lubrication, micro & nanolubrication phenomena, to lubrication in biological systems. To investigate these areas the scope of the journal encourages fundamental and application-based studies on: Synthesis, chemistry and the broader development of high-performing and environmentally adapted lubricants and additives. State of the art analytical tools and characterisation of lubricants, lubricated surfaces and interfaces. Solid lubricants, self-lubricating coatings and composites, lubricating nanoparticles. Gas lubrication. Extreme-conditions lubrication. Green-lubrication technology and lubricants. Tribochemistry and tribocorrosion of environment- and lubricant-interface interactions. Modelling of lubrication mechanisms and interface phenomena on different scales: from atomic and molecular to mezzo and structural. Modelling hydrodynamic and thin film lubrication. All lubrication related aspects of nanotribology. Surface-lubricant interface interactions and phenomena: wetting, adhesion and adsorption. Bio-lubrication, bio-lubricants and lubricated biological systems. Other novel and cutting-edge aspects of lubrication in all lubrication regimes.
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