This work presents the methods for testing the resistance of materials due to corrosion of structural steel, in the presence of corrosion agents in the immediate vicinity of the industrial complex RTB in Bor. General corrosion testing was performed near the Sulfuric Acid Plant, Electrolytic Refining Plant and next to the automatic air quality monitoring station in Bor for 6 months, as well as in the salt chamber for 120h and 240h and by immersion of samples in electrolyte solution from the Electrolytic Refining Plant for of a month. The results were compared with the standard samples stored in the laboratory. A method based on measuring the loss of mass was used to evaluate the material corrosion resistance. Samples are rectangular, dimensions adopted according to the standard EN 10002-1. The steel used is S235, and its mechanical characteristics were obtained from the tensile test.

This paper presents the technological and structural design solution of a tunnel-shaped underpass constructed for the coal conveyor belt of a combined transport system, serving the Roof Exploitation Zone of the Gacko - Central Field open-pit coal mine. The underpass has a clear opening of 6.1 meters in width and 2.5 meters in height and is positioned at an azimuth of 140 degrees. It is integrated beneath a haul road intended for ultra-heavy-duty mining trucks, specifically BELAZ trucks with a payload capacity of 110 tonnes, used for overburden transport. The underpass is equipped with wing walls on all sides, to ensure structural stability and seamless integration with the surrounding terrain. The solution ensures uninterrupted operation of the conveyor system while maintaining the safety and functionality of the haul road for continuous mining operations.

The aim of this study was evaluation of atmospheric corrosion of structural steel S235JR in an industrial environment. General corrosion testing was carried out for six months in the field, at selected atmospheric corrosion stations, near the Sulphuric acid plant, in the Electrolytic refining plant and next to the automatic air quality monitoring station in the city of Bor, Serbia. The results were compared with the standard specimens stored in the laboratory. The steel S235JR specimens were characterized regarding mechanical characteristics by tensile testing. With the aim of assessing the mutual effect of corrosion and polluted industrial environment meteorological parameters were also determined, as well as pollutants in the atmosphere (mainly SO2). The X-ray diffraction method was used to identify the composition of corrosion products. Research within this work enabled a better understanding of the behavior of structural steel S235JR in which there was a reduction in load capacity due to corrosion. The corrosion rates obtained under each tested exposure condition showed noticeable differences. It was found that depending on the content of pollutants in the atmosphere and the location of the steel specimen, the corrosion products represented different compounds and solid phases.

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 Saccharomyces cerevisiae 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⁻², 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.

The aim of this paper is to present a method for determine a model for accelerated corrosion testing of S235 steel. The experiment was conducted in two parts. In the first part, steel specimens were placed in the Electrolytic Refining Plant, in real conditions, in a indoor. This part of the experiment lasted 6 months. In the second part of the experiment, an attempt was made to obtain a model for accelerated corrosion testing that would accurately simulate real conditions in the Electrolysis. The steel specimens were therefore immersed in the electrolyte solution from the Electrolysis for a month. After cleaning the specimens, mass loss measurements were performed, and then these values were used to determine the corrosion rate after extended exposure. The results show that a shorter experimental duration should be chosen for specimens immersed in the electrolyte solution.

The paper presents an approach to managing the development of the main mining project for an X-Ray sensor-based coal sorting plant under complex technical and organizational conditions at the Gacko open-pit mine. The project team was virtual in nature, consisting of members from multiple countries and disciplines. Through the application of modern project management tools (OBS, WBS, MS Project), the efficiency of planning, control, and risk management was analyzed. The results highlight the importance of a multidisciplinary and digitally integrated approach in the implementation of complex mining projects.