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Compact Metal–Organic Frameworks for Anti‐Corrosion Applications: New Binary Linear Saturated Carboxylates of Zinc
Author(s) -
Mesbah Adel,
Jacques Sophie,
Rocca Emmanuel,
François Michel,
Steinmetz Jean
Publication year - 2011
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201001024
Subject(s) - zinc , corrosion , lamellar structure , chemistry , coating , metal , electrochemistry , metal organic framework , powder diffraction , carboxylate , synchrotron , chemical engineering , inorganic chemistry , crystallography , organic chemistry , adsorption , physics , electrode , nuclear physics , engineering
Zinc‐based metal–organic frameworks (MOFs), binary zinc carboxylates ZnC n C n′ with C n and C n′ = CH 3 (CH 2 ) n – 2 COO – , have been synthesised and characterised for anti‐corrosion applications. The crystallographic structures of ZnC 10 C 14 and ZnC 10 C 16 were determied from synchrotron powder diffraction data and refined by the Rietveld method. Protective coatings on electrogalvanised steel composed of ZnC 12 C 16 have been developed by formulating a particular “carboxylating” bath. The ZnC 12 C 16 coating exhibits better anti‐corrosion behaviour than the pure Zn(C 16 ) 2 and Zn(C 12 ) 2 coatings, according to electrochemical and non‐electrochemical measurements. The crystallographic results and corrosion measurements demonstrate the great flexibility of the zinc carboxylate lamellar structures in modifying the insolubility and hydrophobicity of the protective coatings. In addition, the conditions for the ZnC 12 C 16 coating process fulfil the specifications for the surface treatment of zinc. Finally, these new compounds, which can be easily synthesised in water, provide a new and environmentally friendly anti‐corrosion treatment for metals.