Films of the Mg(OH)2/Mg-Al layered double hydroxide composite were formed on the combustion-resistant magnesium alloy AMCa602 by steam coating and characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy. The corrosion-resistance performances of the films in a 5wt% NaCl solution were investigated using electrochemical measurements. The corrosion current density of the sample that was steam-coated at 433K for 6h using the aqueous solution containing 200mM Al(NO3)3 decreased significantly more than that of the bare AMCa602. The correlations between the Mg-Al LDH content in the films, Al(NO3)3 concentration in the aqueous solutions, and corrosion current densities were investigated.
ASJC Scopus subject areas
- 化学 (全般)