Improvement of tribological behavior of stainless steels in food cleaning process by sodium hydrogen carbonate

IF 6.1 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Kaouthar Bouguerra , Yan-Ming Chen , Alexandre Romaine , Nadège Ducommun , Pierre-François Cardey , Eric Bourhis , Pascal Andreazza , Damien Valente , Micka Bah , Caroline Richard
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引用次数: 0

Abstract

Stainless steel pumps in food industries are prone to seizure during sanitation operations. To understand the tribocorrosion phenomena induced during the cleaning routine, tribological and tribocorrosion tests were carried out using three inexpensive, eco-friendly domestic cleaning solutions: 8 % acetic acid, and 5 % sodium hydrogen carbonate. Some tests were conducted in demineralized water, which served as a reference medium. High friction and wear were observed with AISI 316 L stainless steel in vinegar and water, consistent with current observations in food cleaning processes. However, in sodium hydrogen carbonate, an unprecedented tribological behavior was recorded under specific test conditions. Worn surface analysis results indicate that this phenomenon is associated with the formation of a passive film composed of chromium oxides/hydroxides and iron oxides/hydroxides, with the emergence of a nickel-rich sublayer. The electrical activity of the passive film demonstrated its insulating behavior. Due to the synergistic interactions between the mechanical wear of the passive film and chemical reactions of AISI 316L stainless steel in sodium hydrogen carbonate, significant improvement in the frictional properties of AISI 316L has been found, which can play an important role in increasing the mechanical life of equipment and energy efficiency.
用碳酸氢钠改善不锈钢在食品清洗过程中的摩擦学特性
食品工业中的不锈钢泵在卫生操作过程中很容易发生故障。为了了解在日常清洁过程中引起的摩擦腐蚀现象,我们使用三种廉价、环保的家用清洁溶液进行了摩擦学和摩擦腐蚀试验:8 % 的醋酸和 5 % 的碳酸氢钠。有些测试是在去矿物质水中进行的,作为参考介质。在醋和水中,AISI 316 L 不锈钢的摩擦和磨损程度较高,这与目前在食品清洁过程中观察到的情况一致。然而,在碳酸氢钠中,在特定的测试条件下记录到了前所未有的摩擦学行为。磨损表面分析结果表明,这种现象与由铬氧化物/氢氧化物和铁氧化物/氢氧化物组成的被动膜的形成有关,同时还出现了富镍子层。被动膜的电活性证明了其绝缘性能。由于被动膜的机械磨损与 AISI 316L 不锈钢在碳酸氢钠中的化学反应之间的协同作用,AISI 316L 的摩擦性能得到了显著改善,这对于提高设备的机械寿命和能源效率具有重要作用。
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来源期刊
Tribology International
Tribology International 工程技术-工程:机械
CiteScore
10.10
自引率
16.10%
发文量
627
审稿时长
35 days
期刊介绍: Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.
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