Preparation and Properties of Cold Zinc Anticorrosive Coatings
In order to improve the anticorrosive performance of cold zinc coatings and to increase the coating adhesion on steel substrate,the SEBS was used as matrix,the composite zinc powder was used as antirust pigment,the high boiling point aromatic hydrocarbon was used as solvent,the corrosion inhibitor and other additives were added to prepare the cold zinc anticorrosive coatings.The anticorrosive performance of the coatings was investigated by neutral salt spray test,and the electrical conductivity was tested by multi-meter and electrochemical method.The results showed that the neutral salt spray resistance of the coating was longer than 2000 h,and the adhesion was 6.5 MPa when the composite zinc content in dry film was 96％ (including spherical zinc powder 92％ and flaky zinc powder 4％) and the barium petroleum sulfonate content was 1.0％;The multi-meter indicated that the coating was conductive;The electrochemical analysis revealed that the corrosion potential was-1020mV which was similar with that of hot-dip zinc and galvanized coating.
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