Oxidation-resisting corrosion-resisting aluminum profile rare earth silane treating fluid and preparation method thereof

Abstract

The invention discloses oxidation-resisting corrosion-resisting aluminum profile rare earth silane treating fluid. The oxidation-resisting corrosion-resisting aluminum profile rare earth silane treating fluid is made from raw materials including, by weight, 120 parts to 130 parts of CeCl37H2O, 180 parts to 190 parts of H2O2, 1.6 parts to 1.8 parts of tetrabutyl titanate, 2.2 parts to 2.3 parts of chitosan, 0.5 part to 0.6 part of acetylacetone, 0.4 part to 0.5 part of H2SO4, a proper amount of deionized water, 1 part to 1.2 parts of tetraethoxysilane, 5 parts to 5.2 parts of methyl triethoxysilane, 50 parts to 53 parts of ethyl alcohol, 10 parts to 11 parts of ammonium hydroxide, 15 parts to 15.6 parts of fluorine-silicon-contained ylate emulsion and 2 parts to 2.5 parts of nanometer zirconium dioxide. According to the fluid, micropores and cracks on the surface of a film formed by the treating fluid are obviously reduced, the compactness is high, and a certain hydrophobic property is achieved; through using of the tetrabutyl titanate, the chitosan, the acetylacetone and the H2SO4, the crosslink level of the passivation film can be strengthened, forming of surface gathering objects can be restrained, and corrosion resistance and oxidation resistance of the passivation film can be strengthened.

Description

technical field [0001] The invention relates to the technical field of chromium-free metal surface treatment agents, in particular to an anti-oxidation and corrosion-resistant aluminum profile rare earth silane treatment liquid and a preparation method thereof. Background technique [0002] Rare earth conversion coatings and silane conversion coatings on aluminum surfaces have been widely concerned as a new generation of metal surface treatment technologies and are expected to replace chromate conversion coatings. As a corrosion inhibitor, the rare earth conversion coating has high bonding strength and good durability, but it is easy to dehydrate and cause cracks, which seriously affects the corrosion resistance. The silane conversion coating has a super-hydrophobic property, is uniform and dense, and can effectively prevent the medium from invading and corroding the substrate. However, the durability of this film layer is poor, and the corrosion resistance will quickly fail...

AI Technical Summary

Problems solved by technology

[0003] However, the strength, wear resistance, compactness, and corrosion resistance of the rare earth silane composite film are not enough, and the performance of the chromate conversion film has not been reached, so it needs to be improved.