Corrosion-resistant ZSM-5 zeolite coatings formed on Mg–Li alloy by hot-pressing

Here we report a novel approach of hot-pressing, adapted to assembly ZSM-5 (Zeolite Socony Mobile-Five) coatings on Mg–Li alloy. X-ray diffraction (XRD) patterns and scanning electron microscopy (SEM) images show that ZSM-5 coatings are uniform and compact. The ZSM-5 exhibits a pure MFI structure. The corrosion behaviors of Mg–Li alloy and ZSM-5 coatings are investigated by electrochemical and immersion tests. The results indicate that ZSM-5 coatings improved the corrosion resistance of Mg–Li alloy, which is related to templates blocking the pores of ZSM-5. The concept of hot-pressing introduced here may be helpful to assemble uniform coatings on other substrates.

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► Form ZSM-5 coatings on Mg–Li alloy.
► The method of hot-pressing was used to form coatings.
► The corrosion behaviors of ZSM-5 coatings were studied.
► The corrosion mechanism of ZSM-5 coatings with different organic amines was studied.
► The stereo-hindrance effect of organic amines to corrosion resistant was studied.