Desenvolvimento de um sistema de monitoramento da corrosão em estruturas metálicas para draga aruangwa utilizando técnicas online e offline

Abstract

This internship report, entitled “Development of a Corrosion Monitoring System for Metallic Structures of the Dredger Aruangwa Using Online and Offline Techniques”, was carried out at EMODRAGA, E.P. The main objective of this study is to design an innovative system for continuous corrosion monitoring in metallic components, combining automated measurements and visual inspections to improve structural integrity control and predictive maintenance. The methodology applied involves the Electrical Resistance (ER) technique as the online method, complemented by visual and ultrasonic inspections for real-time evaluation of material degradation. The proposed system integrates corrosion sensors, process transducers (pressure and flow), a Programmable Logic Controller (Siemens S7-1200 PLC) and a Human-Machine Interface (HMI) for data processing, visualization, and alarm management. Expected results indicate that the system will reduce maintenance costs, increase operational safety, and extend the service life of the dredger’s metallic structures. The total investment of USD 9,740 has an estimated payback period of two years, demonstrating its technical and economic feasibility. This project represents a significant contribution to the modernization of maritime maintenance in Mozambique, combining technology, sustainability, and industrial innovation.