This paper presents the results of research on the corrosion behavior of brass CuZn42 in an acidic environment, in the presence of copper ions. Based on the recorded anodic polarization curves, it was concluded that as the concentration of copper ions in the tested solution increases, the corrosion current densities also increase. This is reflected in the occurrence of the decinking process of brass, during which zinc is deposited on its surface, while the remaining porous copper stays within the brass mass.

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.

This study presents preliminary research on corrosion conditions and mitigation strategies in the hot water distribution system in the town of Bor, Serbia. It aims to provide a foundation for further investigations into corrosion rates, the feasibility of cathodic protection for the system's pipes, appropriate water treatment, and the use of suitable inhibitors. The paper characterises pipe material and water in the secondary network. In the peripheral parts of the network, the heat-transfer water is not of adequate quality, resulting in corrosion acceleration and leaks in the system during the heating season.

Corrosion-induced material loss can lead to significant degradation of the mechanical properties and load-bearing capacity of steel structural elements. The resulting material behaviour can be associated with the mechanisms of void nucleation, growth and coalescence characteristic of ductile fracture. This paper presents the implementation of a material damage model based on the Complete Gurson Model (CGM) in Abaqus/Standard using a user-defined UMAT subroutine. The implemented model incorporates the Gurson-Tvergaard-Needleman approach and the Thomason failure criterion, enabling the simulation of material degradation and ductile fracture. The input material parameters and state variables required for the numerical analysis are presented, together with the interaction procedure between Abaqus and the UMAT subroutine. The proposed implementation provides an extended material model for numerical analysis of steel elements affected by corrosion and other surface damage mechanisms.

This study investigates the neutralization of wastewater generated after the cementation process in copper metallurgy. Samples of wastewater were mixed with influent wastewater from the industrial wastewater treatment plant at different ratios (10:1 and 20:1). The mixtures were neutralized with 10% Ca(OH)₂ solution to pH 8.5, followed by the addition of a flocculant. The results demonstrated that the concentrations of copper, zinc, chromium, and iron decreased significantly. For mixtures at a 20:1 ratio, the concentrations of all examined metals were below the prescribed emission limit values (ELVs). The study confirms that neutralization with Ca(OH)₂ is an effective treatment method for ensuring compliance with environmental standards before discharge into natural recipients.