Dimitrijević Stevan P, Dimitrijević Silvana B, Koerdt Andrea, Ivanović Aleksandra, Stefanović Jelena, Stanković Tanja, Gerengi Husnu
Innovation Centre, Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia.
Mining and Metallurgy Institute Bor, Alberta Ajnštajna 1, 19210 Bor, Serbia.
Materials (Basel). 2025 Mar 12;18(6):1253. doi: 10.3390/ma18061253.
The production of fruit brandies is based on distilling fermented fruit juices. Distillation equipment is usually made of copper. In traditional manufacturing, it consists of a boiler (batch) distiller, a boiler (pot), a steam pipe, and a condenser, all of which are made of pure copper. This study determined the corrosion parameters for copper (Cu) and Cu72Zn28 (in wt%) alloy in fermented apricot juice at room temperature. The fermentation process examined in this research utilized natural strains of yeast and bacteria, supplemented by active dry yeast strains. This research used the following methods: open circuit potential (OCP), linear polarization resistance (LPR), and Tafel extrapolation to identify corrosion parameters. Cu had a 3.8-times-lower value of corrosion current density than brass, and both were within the range of 1-10 μA·cm, with an excellent agreement between LRP and Tafel. This study proved that Cu is an adequate material for the distillation of fruit brandies from a corrosion perspective. Despite this, there are occasional reports of corrosion damage from the field. Significant corrosion impacts can arise, as evidenced by laboratory tests discussed in this paper. In the absence of a highly corrosive environment, this study indicates that, to some extent, microbiologically influenced corrosion (MIC) can influence the degradation of the equipment material.
水果白兰地的生产基于对发酵果汁的蒸馏。蒸馏设备通常由铜制成。在传统制造中，它由一个釜式（间歇式）蒸馏器、一个釜（罐）、一根蒸汽管和一个冷凝器组成，所有这些均由纯铜制成。本研究测定了铜（Cu）和Cu72Zn28（重量百分比）合金在室温下于发酵杏汁中的腐蚀参数。本研究中考察的发酵过程利用了天然酵母和细菌菌株，并添加了活性干酵母菌株。本研究采用了以下方法：开路电位（OCP）、线性极化电阻（LPR）和塔菲尔外推法来确定腐蚀参数。铜的腐蚀电流密度值比黄铜低3.8倍，两者均在1 - 10 μA·cm范围内，线性极化电阻（LRP）和塔菲尔之间具有良好的一致性。本研究证明，从腐蚀角度来看，铜是用于水果白兰地蒸馏的合适材料。尽管如此，仍有来自现场的偶尔腐蚀损坏报告。如本文所讨论的实验室测试所示，可能会产生重大的腐蚀影响。在不存在高腐蚀性环境的情况下，本研究表明，在一定程度上，微生物影响的腐蚀（MIC）会影响设备材料的降解。
