Effect of silane matrix on corrosion protection of zeolite based composite coatings

In the present work, the comparison of the anti-corrosive properties of various types of zeolite based coatings, with different silane matrix on AA6061 aluminum substrates, are reported. High hydrophobicity, good adhesion and resistance to corrosion were observed for silane modified with the addition of SAPO-34 zeolite filler. Electrochemical impedance spectroscopy (EIS) tests were performed on all samples in a 3.5% (w/w) NaCI solution at increasing immersion times. All composite films showed good durability. Depending on the type of silane used as a matrix, the composite coating evidenced high stability up to one year of immersion.