Nanocomposites and nanomaterials
The anticorrosion performances of the ion-modified zeolites for aluminium alloy
Danyliak M.-O.M., Khlopyk O.P., Zin I.M., Korniy S.A.
Karpenko Physico-Mechanical Institute of NAS of Ukraine. 
Naukova str., 5, Lviv-79060, Ukraine. 
E-mail: danyliak-olena@ukr.net

Zeolite is a kind of nanocrystalline aluminosilicate mineral, which usually has ion-exchange, catalytic and adsorption properties. Zeolites are also used to protect metals and alloys [1]. Corrosion protection performance zeolites increased by modification of metal cations. In this study, zeolite particles were modified with zinc, calcium and manganese cations. The modified zeolites were added in 0.1% NaCl solution at concentration of 2 g/l. Corrosion resistance of the aluminum alloy (S=1 cm2) in 0.1% NaCl solution with addition of zeolites was studied by potentiometry and potentiodynamic polarization methods, using a saturated Ag/AgCl reference electrode and a counter platinum electrode. The potential scan rate during experiments was 2 mV/s. 
The corrosion potential and corrosion current of the aluminum alloy after 24 h exposure in 0.1% NaCl solution were equal -0.64 V and 0.18·10-2 mA/cm2, respectively (fig. 1). The corrosion inhibiting properties of the modified zeolites increase in order Са2+ zeolite <Mn2+ zeolite <Zn2+ zeolite.
	Fig. 1. Potentiodynamic polarization curves of D16T aluminium alloy after 24 h exposure in 0.1% NaCl solution: 1 – uninhibited,
2 – suspension with Са-zeolite,
3 – suspension with Zn-zeolite,
4 – suspension with Mn-zeolite	

The corrosion resistance of the aluminum alloy in zeolite suspensions is increased in about 2-9 times compared with the uninhibited 0.1 % NaCl solution.

1.	Zin I. M., Kornii S. A., Kytsya A. R., Bilyi L. M.,  Danylyak M.-O. M., Lyutyi P. Ya. Protective Properties of Alkyd Coatings Inhibited by Complex Zeolite-Phosphate Pigment // Mater. Sci. 2020.-56(2). - P. 284–289.

The work was performed within the project № 2020.02/0063 “Synthesis and properties of new complex anti-corrosion pigments for paint coatings based on aluminosilicate nanocontainers” of the National Research Foundation of Ukraine.