20.500.12556/DiRROS-15879 Corrosion protection of brown and green patinated bronze Bronze surfaces, whether bare or patinated, tend to change when exposed to an outdoor atmosphere. Art made of bronze which is exposed to the outdoors is usually artificially patinated. This patina changes when exposed to rain, especially in polluted rain, where sulphuric, nitric or carbonic acids are present. In order to gain optimal protection of different patinas and consequently reduce the patina changes over the time different protection systems were developed, tested and tailored. Three types of patina (brown, green sulphate, and green persulphate) were prepared, protected and subsequently studied. The protections were based on two coatings (i) fluoropolymer based coating (FA-MS) and (ii) newly developed fluoropolymer based coating with addition of mercaptopropyl groups, named as alternative fluoropolymer coating (FA-MS-SH). Both the pure patinas applied on bronze surfaces as well as the bare bronze were electrochemically tested, first unprotected and then following the application of two different types of protection. After the protection was applied to the pa- tinas, the change in colour was defined. Different techniques were utilised in order to define the morphology and structure of the patinas, as well as the change in colour following application of the coating. It was shown that a fluoropolymer coating (FA-MS) provided the most efficient protection to bare bronze and the sulphate patina, while a newly proposed alternative fluoropolymer coating (FA-MS-SH) offered good protection to bare and brown patinated bronze. A mechanism for the protection of bare and patinated bronze was suggested. bronze patina protection bron patina zaščita true false true Elsevier Sequoia Angleški jezik Slovenski jezik © 2021 The Authors. Published by Elsevier B.V. Neznano 2022-12-02 10:15:04 2023-07-17 08:29:57 2023-07-18 03:35:19 0000-00-00 00:00:00 2021 0 0 Št. članka 106510; str. 1-9 Vol. 161 Dec. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2021-09-08 544.5/.6 0300-9440 10.1016/j.porgcoat.2021.106510 75622147 https://www.sciencedirect.com/science/article/pii/S0300944021003817 Odprti dostop 1 6ce67a09-7219-11ed-a69a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=20996 RAZ_Kosec_Tadeja_2021.pdf RAZ_Kosec_Tadeja_2021.pdf 1 7FBDFA1B16D23A6A1AF4B84A7CCE4B20 1e55bf0f8be20e999b59e247582e147c95a90976c878f4bf7a49c2b304d53a61 028fd552-9c77-11ed-b359-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21470 Zavod za gradbeništvo Slovenije 0 0 0