Temperature effect and alloying elements impact on the corrosion behaviour of the alloys exposed to molten carbonate environments for CSP application
نویسندگان
چکیده
This investigation assesses the effect of alloy composition and temperature in corrosivity ternary carbonate eutectic, 32% Li2CO3, 33% Na2CO3, 35% K2CO3. To this end, an iron-based alloy, coded as 51Fe-24Cr-20Ni, a nickel-based 5Fe–23Cr-58Ni-8Mo, were exposed to mixture for 500 h at 700 ºC, 750 ºC 800 under static atmospheric air. The results revealed that corrosion extension does not have linear dependence on temperature. There are changes mechanism depend temperature, but, turn, they directly influenced by alloying elements material. performance substrate proved be catastrophic all studied temperatures. order from worst best was > ºC. presence high molybdenum concentration contact with suggested element dissolution contributes increasing mixture. By contrast, showed improved resistance, estimated rate hundreds microns three 51Fe-24Cr-20Ni achieved followed while highest degradation registered reinforced idea complexity processes molten carbonate. equilibrium corrosive species is very sensitive important number parameters, meaning modifications system conditions great impact corrosivity. Hence, it critical make assumptions when considering potential materials containment CSP technology.
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ژورنال
عنوان ژورنال: Corrosion Science
سال: 2022
ISSN: ['1879-0496', '0010-938X']
DOI: https://doi.org/10.1016/j.corsci.2022.110274