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Surface modification for enhanced corrosion resistance using fluid bed reactor chemical vapour deposition (FBR-CVD)
journal contribution
posted on 2010-01-01, 00:00 authored by K Ralston, Daniel FabijanicDaniel Fabijanic, N BirbilisThe use of materials with otherwise desirable mechanical properties is often problematic in practice as a result of corrosion. Susceptibility may arise for a number of reasons, including an electrochemically heterogeneous surface or destabilisation of a passive film. These shortcomings have historically been overcome through the use of various coatings or claddings. However, a more robust surface layer with enhanced corrosion resistance could possibly be produced via local surface alloying using a fluidised bed. A fluidised bed treatment allows a surface to be alloyed, producing a distinct surface layer up to tens of microns thick. Surface alloying additions can be selected on the basis of whether they are known or suspected to enhance the corrosion resistance of a particular material, whilst at a minimum, surface alloying likely provides a more electrochemically homogeneous surface. Electrochemical evaluations using potentiodynamic polarisations in NaCl electrolytes have shown chromised plain carbon and stainless steel surfaces have decreased rates of corrosion, decreased passive current densities, and ennobled pitting potentials relative to untreated specimens.
History
Journal
Materials science forumVolume
654-656Pagination
1956 - 1959Publisher
Trans Tech PublicationsLocation
SwitzerlandISSN
0255-5476Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2010, Trans Tech Publications, SwitzerlandUsage metrics
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