Abstract: Disclosed herein is an aqueous non-Cr passivating composition including, on the basis of the weight of the non-Cr passivating composition: (a) 5 to 20% by weight of a silicon-containing compound; and (b) 5 to 15% by weight of a water-borne polymer, which is selected from the group consisting of a polyurethane resin, an epoxy resin, a polyacrylate resin and the combination thereof. Further disclosed herein are a metal with a surface passivated by the aqueous non-Cr passivating composition and an article having a metallic surface passivated by the aqueous non-Cr passivating composition, and a process for passivating a metallic surface with the aqueous non-Cr passivating composition.

Abstract: Described herein is an anti-rust composition for metal surfaces including: a) 30% to 80% by weight of water-soluble or water-dispersible acrylic resin and/or urethane resin; b) 0.1% to 10% by weight of epoxysilane and/or vinylsilane; c) 0.1% to 3% by weight of silicone surfactant and/or fluorosurfactant; d) 0.1% to 10% by weight of alcohol and/or ether; and e) water, where the weight percentage of each component is based on the total weight of the aqueous composition. Also described herein is an anti-rust treatment method on a metal surface including steps of i) coating the invented anti-rust composition onto the metal surface and ii) drying the coating layer at a temperature from 60° C. to 150° C. Also described herein is an anti-rust treated coil steel obtained by the anti-rust treatment method.

Abstract: Disclosed herein is an aqueous composition including components (A) from 10% to 35% by weight of acrylic resin without hydroxyl group, where the acrylic resin has an average particle diameter in a range of from 50 ?m to 200 ?m measured by dynamic light scattering according to ISO13321:2004, (B) from 0.1% to 4% by weight of a film-forming aid having a boiling point of no more than 300° C. under 1 atm, (C) from 1% to 8% by weight of a lubricant having an average particle diameter in a range of from 100 nm to 600 nm measured by dynamic light scattering according to ISO13321:2004, and (D) from 0.1% to 1% by weight of a water-soluble chromium compound, where its weight is calculated from the chromium element, and the weight percentages of all components are based on the total weight of the aqueous composition.