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Effects of dynamic conditions in the corrosion of stainless steel and graphite with molten Al-Si alloy for transport applications

Navarrete Argiles, Nuria and Rawson, Anthony Joseph and Villada Vargas, Carolina and Agudo, José Rodríguez and Giehl, Christopher and Kargl, Florian (2021) Effects of dynamic conditions in the corrosion of stainless steel and graphite with molten Al-Si alloy for transport applications. In: EUROCORR 2021. EUROCORR 2021, 20-24 Sep 2021, Online. (Unpublished)

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Official URL: https://eurocorr2021.org/index.php


Energy storage systems are key mechanisms for the transition to more sustainable energy sources. In the case of applications that involve heating intermittency, the use of phase change materials (PCMs) as thermal energy storage systems is of relevance. Particular metals and metallic alloys represent a promising alternative for their use as PCMs due to their high latent heat and high density, minimising the storage volume, and high thermal conductivity, allowing fast charge and discharge. However, the high operating temperatures, the reactivity of the molten metals and the periodic melting and solidification cycles promote corrosion of the container materials. Moreover, applications involving relative movement between the components (e.g. sloshing or pumping) can experience erosive-corrosive wear. In this work, a thermal energy storage system using an Al-Si alloy as PCM intended for application in electric vehicle cabin heating is analysed in terms of the compatibility with graphite and 304 stainless steel. The formation of new phases and potential reaction products at a static interface between container and molten material has been studied. Furthermore, the relative motion expected in the application has been simulated using a high temperature rheometer with cup and bob geometry. The type and extent of phases formed under dynamic conditions have been identified, exemplifying the influence of erosive-corrosive interaction as compared to static corrosion. The experimental methods, results and an appraisal of the impact of relative motion on wear in metallic phase change material systems undergoing dynamic conditions will be given.

Item URL in elib:https://elib.dlr.de/145461/
Document Type:Conference or Workshop Item (Speech)
Title:Effects of dynamic conditions in the corrosion of stainless steel and graphite with molten Al-Si alloy for transport applications
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Navarrete Argiles, NuriaUNSPECIFIEDhttps://orcid.org/0000-0001-8446-8951UNSPECIFIED
Agudo, José RodríguezAnton Paar Germany GmbHUNSPECIFIEDUNSPECIFIED
Giehl, ChristopherAnton Paar Germany GmbHUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:EUROCORR 2021
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Tribocorrosion, Erosion, Corrosion, Phase-change materials, mPCMs
Event Title:EUROCORR 2021
Event Location:Online
Event Type:international Conference
Event Dates:20-24 Sep 2021
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Energie und Verkehr (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Scientific Experiments MP
Deposited By: Navarrete Argiles, Nuria
Deposited On:06 Dec 2021 08:18
Last Modified:29 Mar 2023 00:49

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