Print Email Facebook Twitter Particle characterisation and depletion of Li2CO3 inhibitor in a polyurethane coating Title Particle characterisation and depletion of Li2CO3 inhibitor in a polyurethane coating Author Hughes, Anthony (CSIRO, Mineral Resources; Deakin University) Laird, James (CSIRO, Mineral Resources) Ryan, Chris (CSIRO, Mineral Resources) Visser, P. (TU Delft (OLD) MSE-6) Terryn, H.A. (TU Delft (OLD) MSE-1; Vrije Universiteit Brussel) Mol, J.M.C. (TU Delft (OLD) MSE-6) Date 2017 Abstract The distribution and chemical composition of inorganic components of a corrosion-inhibiting primer based on polyurethane is determined using a range of characterisation techniques. The primer consists of a Li2CO3 inhibitor phase, along with other inorganic phases including TiO2, BaSO4 and Mg-(hydr)oxide. The characterisation techniques included particle induced X-ray and γ-ray emission spectroscopies (PIXE and PIGE, respectively) on a nuclear microprobe, as well as SEM/EDS hyperspectral mapping. Of the techniques used, only PIGE was able to directly map the Li distribution, although the distribution of Li2CO3 particles could be inferred from SEM through using backscatter contrast and EDS. Characterisation was also performed on a primer coating that had undergone leaching in a neutral salt spray test for 500 h. Overall, it was found that Li2CO3 leaching resulted in a uniform depletion zone near the surface, but also much deeper local depletion, which is thought to be due to the dissolution of clusters of Li2CO3 particles that were connected to the external surface/electrolyte interface Subject primerLi-inhibitedAA2024polyurethaneSEMEDSPIXEPIGEleachingpigments To reference this document use: http://resolver.tudelft.nl/uuid:95c563ed-5be5-44db-9365-2c136b1eadfa DOI https://doi.org/10.3390/coatings7070106 ISSN 2079-6412 Source Coatings, 7 (7) Part of collection Institutional Repository Document type journal article Rights © 2017 Anthony Hughes, James Laird, Chris Ryan, P. Visser, H.A. Terryn, J.M.C. Mol Files PDF coatings_07_00106.pdf 14.95 MB Close viewer /islandora/object/uuid:95c563ed-5be5-44db-9365-2c136b1eadfa/datastream/OBJ/view