| Abstract [eng] |
Given the significant generation of electronic waste, approaches are being sought to address this growing problem, which is a growing concern due to the large amount of waste generated and the rather complex recycling process that may be involved. The prospect of etching metals into a solution that can be subsequently utilized for the recovery and reuse of valuable metals is currently under extensive investigation. However, these solutions are known to be aggressive and corrosive, not only to waste but also to the process equipment. The present study investigates the corrosion resistance properties of three structural steels in model media analogous to those employed in the recycling of electronic waste by corroding valuable metals. The selected model media are as follows: The following solutions were utilized 1 % NaF, 200 g/l H2SO4, 200 g/l H2SO4 + 100 g/l CuSO4, 200 g/l H2SO4 + H2O2 0,26 %, 200 g/l H2SO4 + H2O2 1,31 %. A comparative analysis was conducted on the outcomes of corrosion tests executed through gravimetric and electrochemical methodologies. The present study utilizes a SEM-EDX analysis to assess the surface morphology and elemental composition of select samples. The text presents a series of recommendations for the selection of steels to work with such media, accompanied by a process flow diagram and an evaluation of safety measures. |
