| 摘要 |
PURPOSE:To prevent pollution and to improve hydrophilic property of the surface of aluminium and corrosion resistance by coating the surface of aluminium with aq. soln. contg. fine powdery silica, water-soluble or water dispersible or. polymer and a specified amt. of fine powdery Zn. CONSTITUTION:Aq. treating soln. contg. fine powdery silica, water-soluble or water-dispersible org. polymer resin, and 5-20wt% (basing on the weight of the fine powdery materials) pulverous Zn is prepd. The surface of aluminium is treated by coating the aq. soln. on the surface of the aluminium. Suitable fine powdery silica is water-dispersible one having 7-100mum particle size. Suitable org. polymer resin is acrylic copolymer, alkyd resin, etc. The mean particle size of the fine powdery Zn is usually ca. 4-5mum. The proportion of the fine powdery silica to the org. polymer resin is usually ca. 30:70-80:20wt. of each solid. |
