Physico-chemical properties of anti-corrosion pigment based on nanoporous zeolite and zinc monophosphate
Tóm tắt
It was studied a composite pigment based on nanoporous zeolite Na-A and zinc monophosphate synthesized by the mechanochemical method. The largest specific surface area achieved for zeolite dispersed particles is 65.3 m2/g, and their crystal structure is preserved after mechanochemical modification in a planetary mill for 60 min at 200 rpm. Mechanochemical treatment of a mixture of zeolite Na-A/Zn(H2PO4)2 initiates intercalation of phosphate in nanopores of a zeolite, which is confirmed by reducing the specific surface area of the composite pigment to 31.6 m2/g. The monophosphate modified nanoporous zeolite provides prolonged desorption of phosphate ions into a corrosion solution according to photocolorimetric results. The new composite pigment with the prolongation effect is very promising for use in anti-corrosion paints. Electrochemical studies have shown high inhibitory efficiency of zeolite Na-A/Zn(H2PO4)2 pigment suspension against corrosion of D16T aluminum alloy in 0.1% sodium chloride solution. Accordingly, the pigments can become effective inhibitory components of primer paints used for the protection of structures made of aluminum alloys under industrial environment.
Tài liệu tham khảo
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