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SUMMARY:David Madden - DFT Studies on the Reactivity of Iron Surfaces: Sea
 rching for Novel Routes to Passivation and Anke Krautsieder - Preparation 
 and testing of novel materials for steel surface maintenance procedures - 
 David Madden\, BPI and Anke Krautsieder\, BPI
DTSTART:20220222T113000Z
DTEND:20220222T123000Z
UID:TALK170738@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:*David Madden\nDFT Studies on the Reactivity of Iron Surfaces:
  Searching for Novel Routes to Passivation*\n\nThe process for repainting 
 steel structures in marine environments involves an initial abrasive blast
 ing step\, with the application of the new coating several hours later. Re
 cent work has highlighted the importance of protecting the steel from corr
 osion immediately\, to maximise the lifetime of the subsequently applied c
 oating. In this talk\, I discuss density-functional theory (DFT) calculati
 ons aimed at assessing whether the highly reactive surface\, briefly expos
 ed on abrading\, can be used to generate a thin layer of adsorbed species\
 , which then imparts protection: the strength of bonding to the surface an
 d reaction pathways of isolated adsorbed species will be discussed\, as wi
 ll changes to the electronic structure of the underlying surface and the b
 ehaviour at higher adsorbate coverages.\n\n*Anke Krautsieder\nPreparation 
 and testing of novel materials for steel surface maintenance procedures*\n
  \nAbrasive blasting of steel using almandine garnet is a common on-site s
 urface cleaning procedure prior to applying protective coatings. A certain
  percentage of almandine garnet and impurities are embedded in or attached
  to the steel due to their relative material hardness\, leading to partial
  surface coverage. These residues can affect the coating adhesion \nand pe
 rformance. Investigation of novel materials for widely used abrasive blast
 ing technologies promises straightforward\, low-cost solutions. The implem
 entation of microcapsules in the abrasive material enables transport of en
 capsulated surface-active reagents directly to the steel and could signifi
 cantly improve the longevity of protective paints.
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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