Master's thesis : Influence of Molten Nitrate Salt Decomposition on Stainless Steel Corrosion in TES

Whar you can expect

With the growing integration of renewable energy, thermal energy storage (TES) has become a key technology for enabling flexible and efficient power generation in concentrated solar power (CSP) plants. 

This Master’s thesis aims to develop a fundamental and experimental understanding of oxide-ion driven corrosion mechanisms in Solar Salt. The work focuses on controlled modification of salt chemistry, systematic corrosion experiments, and objective criteria to identify critical oxide concentrations at which corrosion behavior changes significantly. The thesis will be carried out within an experienced research environment, contributing to the safe and efficient operation of next-generation TES systems.

Your tasks

• Familiarization with molten nitrate salt corrosion in TES systems and the role of salt chemistry (salt decomposition etc.)
• Planning and execution of a systematic screening matrix for relevant TES alloys (final selection based on availability and project requirements)
• Conducting high-temperature salt exposure tests under defined conditions with controlled salt modifications
• Post-test evaluation using standardized methods (mass change/mass loss, SEM-EDX microstructural characterization, and damage/spallation assessment)
• Optional advanced analytics (e.g., salt chemistry analysis (IC, titration), dissolved metal trends) depending on available equipment/time
• Development of an objective “critical condition” criterion and preparation of a comparative results chart plus a thesis-ready dataset/Report

Your profile

• Enrolled Master’s student in Materials Science, Mechanical Engineering, Chemical Engineering, Aerospace/Power Engineering, or similar
• Basic knowledge of materials / corrosion / high-temperature processes 
• Interest in experimental work (handling furnaces, sample preparation, microscopy workflows)
• Good English skills