One-pot synthesis of NiAl-CO3 LDH anti-corrosion coatings from CO2-saturated precursors

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Liu, Yi; Yu, Tongwen; Cai, Rui; Li, Yanshuo; Yang, Weishen; Caro, Juergen: One-pot synthesis of NiAl-CO3 LDH anti-corrosion coatings from CO2-saturated precursors. In: RSC Advances 5 (2015), Nr. 37, S. 29552-29557. DOI: http://dx.doi.org/10.1039/c5ra01969a

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Abstract: 
Anti-corrosive coatings based on layered double hydroxides (LDHs) have been considered as promising alternatives to conventional chromate-containing conversion coatings. Among various LDHs, carbonate-intercalated LDH coatings with a c-axis preferred orientation should be the optimum structure for protecting metals against corrosion. Herein we successfully prepared NiAl–CO3 LDH coatings on aluminium plates in one step. Particularly it was found that CO2 dissolved in the precursor solution exerted great influence on the microstructure and anti-corrosion capacity of prepared LDH coatings. Trace amounts of CO2 in the precursor solution led to the formation of ab-oriented 7 μm-thick LDH coatings, while preferentially c-oriented LDH coatings with an average thickness of 12 μm were formed from CO2-saturated precursor solutions. A DC polarization test demonstrated that preferentially c-oriented LDH coatings exhibited much higher anti-corrosion performance than ab-oriented LDH coatings possibly due to the decreased density of mesoscopic defects. Simultaneously, CO2, the green gas, was also positively utilized.
License of this version: Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
Document Type: article
Publishing status: publishedVersion
Issue Date: 2015-03-19
Appears in Collections:Naturwissenschaftliche Fakultät

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pos. country downloads
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1 image of flag of Germany Germany 97 50.79%
2 image of flag of China China 49 25.65%
3 image of flag of United States United States 11 5.76%
4 image of flag of Korea, Republic of Korea, Republic of 4 2.09%
5 image of flag of India India 4 2.09%
6 image of flag of Japan Japan 3 1.57%
7 image of flag of Iran, Islamic Republic of Iran, Islamic Republic of 3 1.57%
8 image of flag of Portugal Portugal 2 1.05%
9 image of flag of Denmark Denmark 2 1.05%
10 image of flag of Brazil Brazil 2 1.05%
    other countries 14 7.33%

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