Corrosion Behaviours of Aged Haynes 282 and Inconel 718 in Acidic and Alkaline Environments

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dc.contributor.authorBodude, M.A.
dc.contributor.authorWasiu, A.A.
dc.contributor.authorOnovo, H.O.
dc.date.accessioned2019-11-13T09:54:20Z
dc.date.available2019-11-13T09:54:20Z
dc.date.issued2018-09
dc.descriptionStaff publicationsen_US
dc.description.abstractHaynes 282 and Inconel 718 are super-alloy materials originally designed and used in aero- and land-based gas turbine engines. However, they are being considered and used in challenging environments such as nuclear power plants, chemical, and petrochemical plants due largely to their high creep strength and corrosion resistance at low and high temperatures. Recently, there is quest for their uses in the oil and gas refineries. This work examines the corrosion behaviour of these two materials in acidic and alkaline environments; similar to that in the petroleum refinery. The samples were cut, aged, and electrochemically characterized using VersaSTAT 3 model potentiostat with graphite counter electrode and Ag-AgCl SCE. The Linear polarization corrosion test conducted revealed that the corrosion rate, break down potential(Ecorr) and the corrosion current(Icorr) of the aged Haynes 218 are 0.05mmpy, 0.198V, 5.032µA in dilute HNO3 ; 0.145mmpy,16.23V,13.48 µA in dilute NaOH while those of aged Inconel 718 are 0.068mmpy,96.5V,63.56 µA in the dilute HNO3 and 0.026mmpy,0.41V,2.478 µA in the dilute NaOH respectively. These results showed that aged Haynes 282 has a higher corrosion resistance than aged Inconel 718 in the acidic medium ,but, the reverse in the alkaline medium .However better corrosion passivation was obtained in HNO3 for the two materials than in NaOH.en_US
dc.identifier.citationBodude, M.A; Wasiu A.A and Onovo, H.O. (2018). Corrosion Behaviours of Aged Haynes 282 and Inconel 718 in Acidic and Alkaline Environments. FUOYE Journal of Engineering and Technology, 3(2): 149-153en_US
dc.identifier.issn2579-0625
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/6844
dc.language.isoenen_US
dc.publisherFUOYE Journal of Engineering and Technologyen_US
dc.relation.ispartofseriesFUOYE Journal of Engineering and Technology;Vol.3(2)
dc.subjectSuper-alloysen_US
dc.subjectHaynes 282en_US
dc.subjectInconel 718en_US
dc.subjectTafel extrapolation methoden_US
dc.subjectResearch Subject Categories::TECHNOLOGY::Other technologyen_US
dc.titleCorrosion Behaviours of Aged Haynes 282 and Inconel 718 in Acidic and Alkaline Environmentsen_US
dc.typeArticleen_US
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