Formation of hydrotalcite coating on the aluminum alloy 6060 in spray system

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  • Lingli Zhou, Denmark
  • Henrik Friis
  • Melanie Roefzaad , Siemens Corporate Technology, Denmark
  • Kasper Bondo Hansen, Siemens Corporate Technology, Denmark
  • Sara Eisenhardt , Siemens Corporate Technology, Denmark
  • Asger Andersen, Siemens Corporate Technology, Denmark
  • Nikolaj Zangenberg , Danish Technological Insitute, Denmark
Coatings with the composition of Li-Al-NO3 hydrotalcite were formed on the Al alloy 6060 using a spray system. The coatings consist of crystals with a typical hydrotalcite structure. Dense, uniform and blade-like flakes cover completely the surface of the Al substrate. The coatings display a multi-layer structure with average thickness of ∼1000 nm. The hydrotalcite-coated samples performed better than those without coatings in salt-spray and filiform-corrosion tests, and further treatment involving sealing with a Mg acetate solution and dipping in a H2O2 + Ce-based solution improved the corrosion resistance ability.
Original languageEnglish
JournalClay Minerals
Pages (from-to)583-592
Publication statusPublished - 3 Jun 2016

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