Inhibition of Steel Corrosion and Alkaline Zinc Oxide Dissolution by Dicarboxylate Bola-Amphiphiles: Self-Assembly Supersedes Host-Guest Conception

Autor:	Fabrice Leroux, Andrej Koenig, Dirk Schmelter, Patrick Keil, Arthur Langry, Horst Hintze-Bruening
Přispěvatelé:	BASF Coatings GmbH, Institut de Chimie de Clermont-Ferrand (ICCF), SIGMA Clermont (SIGMA Clermont)-Institut de Chimie du CNRS (INC)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)
Jazyk:	angličtina
Rok vydání:	2017
Předmět:	Materials science Passivation Science Intercalation (chemistry) chemistry.chemical_element 02 engineering and technology Zinc engineering.material 010402 general chemistry 01 natural sciences Article Corrosion chemistry.chemical_compound Coating [CHIM]Chemical Sciences Dissolution Multidisciplinary Succinic anhydride 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering engineering Hydroxide Medicine 0210 nano-technology
Zdroj:	Scientific Reports, Vol 7, Iss 1, Pp 1-12 (2017) Scientific Reports Scientific Reports, 2017, 7, pp.2785. ⟨10.1038/s41598-017-02769-y⟩ Scientific Reports, Nature Publishing Group, 2017, 7, pp.2785. ⟨10.1038/s41598-017-02769-y⟩ 'Scientific Reports ', vol: 7, pages: 2785-1-2785-12 (2017)
ISSN:	2045-2322
DOI:	10.1038/s41598-017-02769-y⟩
Popis:	For many decorative applications like industrial and architectural paints, prevention of metal substrates from corrosion is a primary function of organic coatings. Triggered release of inhibitor species is generally accepted as a remedy for starting corrosion in case of coatings damage. A polyurethane based coating, doped with bola-amphiphiles of varying molecular weight but with a common head group motif that stems from ring-opened alkenyl succinic anhydride, enables passivation of the defect and mitigates cathodic delamination, if applied on cold rolled steel. An antagonistic effect results from the intercalation of the bola-amphiphiles into layered double hydroxide Zn2Al(OH)6 and subsequent incorporation of the hybrid phase into the organic matrix. In particular higher molecular weight bola-amphiphiles get immobilized through alkaline degradation of the layered framework in the basic milieu at the cathode. By means of sediments from colloidal states it is demonstrated that in-situ formed zinc oxide encapsulates the hybrid phase, evidenced by impeded dissolution of the ZnO based shell into caustic soda. While inhibition of steel corrosion results from a Donnan barrier layer, impeded zinc oxide dissolution is rooted in zinc catalyzed bola-amphiphile hydrolysis and layered deposition of the crystalline spacer diol hydrogenated bisphenol-A.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a423a606bc770acf21694bcf47ec6f0 https://doaj.org/article/40206f5aeb714a0d9c7971c2e96f2a11 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.