FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2309573886> ?p ?o ?g. }

• W2309573886 abstract "Corrosion Protection and Microstructure of Dissimilar Materials. A thesis submitted to The University of Manchester for the degree of Doctor of Philosophy by Uyime, Donatus on the 30th of July, 2015.Investigations on the micro- and macro-galvanic corrosion mechanisms in un-coupled AA2024-T3 alloys, AA2024-T3 coupled with mild steel (with and without the influence of cadmium and under varying solution temperatures), dissimilar friction stir welds of AA5083-O and AA6082-T6 alloys and a friction stir welded AA7018 alloy have been carried out. Selected methods of preventing and / or minimising the investigated corrosion phenomena were also investigated.The investigation of the corrosion behaviour of the uncoupled AA2024-T3 alloy revealed that there are two distinct stages of polarization during the galvanostatic polarization of AA2024T3 alloy in de-aerated 3.5% NaCl solution. From the first stage, the relationships between the pitting incubation time, pitting potential and applied current density for AA2024T3 alloy in the de-aerated condition were established. Whilst studying the in situ corrosion phenomena on the uncoupled AA2024-T3 alloy using the scanning vibrating electrode technique (SVET),three distinct stages in the variation of the recorded current density values with time were revealed. Attempts were made to correlate these stages with the corrosion behaviour of the alloy.The study of the galvanic interactions between AA2024-T3 and mild steel revealed that AA2024-T3 is anodic to mild steel at room temperature, but polarity reversal of the couple starts (from a temperature as low as 35 oC upwards) when the couple is introduced into the solution above ambient temperature. Importantly, AA2024-T3 is clearly cathodic to mild steel at 60 oC, although with very low measured galvanic current values. Cadmium coating (at ambient temperature) on the mild steel reduced the galvanic corrosion of the couple by as much as 20 �A/cm2 because of the formation of a CdO/Cd(OH)2 layer on mild steel. In the study of the dissimilar friction stir welds of AA5083-O and AA6082-T6 alloys, it was observed that material flows (pushes but does not mix) more from the advancing side into the retreating side and that the mixture of materials is far from complete. Two welding speeds were compared; the welding speeds have no clear influence on the microhardness, but affected the mixing proportions in the flow arm and in the nugget stem. The faster welding speed resulted in increased susceptibility to corrosion because of the reduced tool rotation per weld length for heat generation and the mixing of materials. The heat affected zones of both alloys and the transition regions between the AA5083-O alloy and the AA6082-T6 alloy rich zones have been identified to be the regions that are most susceptible to corrosion. Anodizing the weld in order to minimise corrosion showed that the AA5083-O alloy rich zones materials, in the weld, oxidizes more during anodizing compared with the AA6082-T6 alloy rich zones. Sputtering deposition prior to anodizing, promotes the formation of a uniform oxide film across the entire weld zones and prevents the boundary dissolution that occurs when the dissimilar weld of AA5083-O and AA6082-T6 alloys is anodized in 4 M H2SO4 solution at 15 V at ambient temperature.The investigation of the corrosion susceptible regions in friction stir welded AA7018 alloy, which was based on the use of ISO 11846 immersion test and the potentiodynamic polarization technique in naturally aerated 3.5 % NaCl solution, revealed intergranular, crystallographic and second phase particle influenced mode of attack. The heat affected zone was found to be the most susceptible to corrosion." @default.
• W2309573886 created "2016-06-24" @default.
• W2309573886 creator A5059869765 @default.
• W2309573886 date "2015-10-26" @default.
• W2309573886 modified "2023-09-24" @default.
• W2309573886 title "Corrosion protection and microstructure of dissimilar materials" @default.
• W2309573886 hasPublicationYear "2015" @default.
• W2309573886 type Work @default.
• W2309573886 sameAs 2309573886 @default.
• W2309573886 citedByCount "0" @default.
• W2309573886 crossrefType "dissertation" @default.
• W2309573886 hasAuthorship W2309573886A5059869765 @default.
• W2309573886 hasConcept C147789679 @default.
• W2309573886 hasConcept C17525397 @default.
• W2309573886 hasConcept C185592680 @default.
• W2309573886 hasConcept C191897082 @default.
• W2309573886 hasConcept C192562407 @default.
• W2309573886 hasConcept C205049153 @default.
• W2309573886 hasConcept C20625102 @default.
• W2309573886 hasConcept C2779720300 @default.
• W2309573886 hasConcept C2780026712 @default.
• W2309573886 hasConcept C2781371449 @default.
• W2309573886 hasConcept C29633239 @default.
• W2309573886 hasConcept C87976508 @default.
• W2309573886 hasConcept C89395315 @default.
• W2309573886 hasConceptScore W2309573886C147789679 @default.
• W2309573886 hasConceptScore W2309573886C17525397 @default.
• W2309573886 hasConceptScore W2309573886C185592680 @default.
• W2309573886 hasConceptScore W2309573886C191897082 @default.
• W2309573886 hasConceptScore W2309573886C192562407 @default.
• W2309573886 hasConceptScore W2309573886C205049153 @default.
• W2309573886 hasConceptScore W2309573886C20625102 @default.
• W2309573886 hasConceptScore W2309573886C2779720300 @default.
• W2309573886 hasConceptScore W2309573886C2780026712 @default.
• W2309573886 hasConceptScore W2309573886C2781371449 @default.
• W2309573886 hasConceptScore W2309573886C29633239 @default.
• W2309573886 hasConceptScore W2309573886C87976508 @default.
• W2309573886 hasConceptScore W2309573886C89395315 @default.
• W2309573886 hasLocation W23095738861 @default.
• W2309573886 hasOpenAccess W2309573886 @default.
• W2309573886 hasPrimaryLocation W23095738861 @default.
• W2309573886 hasRelatedWork W1490323938 @default.
• W2309573886 hasRelatedWork W150980359 @default.
• W2309573886 hasRelatedWork W1979286537 @default.
• W2309573886 hasRelatedWork W1996310214 @default.
• W2309573886 hasRelatedWork W2021476197 @default.
• W2309573886 hasRelatedWork W2046982952 @default.
• W2309573886 hasRelatedWork W2061197218 @default.
• W2309573886 hasRelatedWork W2063496678 @default.
• W2309573886 hasRelatedWork W2071217284 @default.
• W2309573886 hasRelatedWork W2158320769 @default.
• W2309573886 hasRelatedWork W2271234334 @default.
• W2309573886 hasRelatedWork W2400227565 @default.
• W2309573886 hasRelatedWork W2463610511 @default.
• W2309573886 hasRelatedWork W2580476210 @default.
• W2309573886 hasRelatedWork W2589847080 @default.
• W2309573886 hasRelatedWork W2799480880 @default.
• W2309573886 hasRelatedWork W2944215735 @default.
• W2309573886 hasRelatedWork W3109895661 @default.
• W2309573886 hasRelatedWork W3149591487 @default.
• W2309573886 hasRelatedWork W2500796685 @default.
• W2309573886 isParatext "false" @default.
• W2309573886 isRetracted "false" @default.
• W2309573886 magId "2309573886" @default.
• W2309573886 workType "dissertation" @default.