Treatment method for aluminium-alloy synergistic fluoropolymer coating with high-temperature viscosity resistance

Abstract

The invention provides a treatment method for an aluminium-alloy synergistic fluoropolymer coating with high-temperature viscosity resistance. The method comprises the following steps: firstly, a mixed acid solution containing sulfonated anthracene is used for preparing an aluminium-alloy hard anodic oxide film by electrolysis; then chambering is performed on the aluminium-alloy hard anodic oxidefilm, and a fluoropolymer is introduced; the fluoropolymer and the aluminium-alloy hard anodic oxide film are fused into a whole by vacuum heat treatment, and the synergistic coating with the high-temperature viscosity resistance is prepared. The prepared aluminium-alloy synergistic fluoropolymer coating with high-temperature viscosity resistance is uniformly black, has quite good uniformity, still has high-temperature viscosity resistance in the range of 160-185 DEG C, and meets use requirements of aluminium alloy under high-temperature viscosity resistant condition; the problem of high-temperature viscosity in a non-PVC bag making process is solved effectively, and non-PVC bag making efficiency can be increased remarkably when the method is applied to a non-PVC bag making production line; besides, the method has quite important application value in solving the welding problems of three-layer films and five-layer films of the aluminium alloy and the problem of poor soldering of films.

Description

technical field [0001] The invention relates to the treatment of high-temperature anti-adhesion coating of aluminum alloy, in particular to a treatment method of high-temperature anti-adhesion fluoropolymer synergistic coating of aluminum alloy. Background technique [0002] Aluminum alloy is an important non-ferrous metal material, which is widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding, chemical industry and other fields. In the process of manufacturing aluminum alloy parts, in order to improve the performance of aluminum alloy parts (such as electrical conductivity, thermal conductivity, wear resistance, corrosion resistance and optical properties, etc.), surface treatment is usually required. At present, the surface treatment methods of aluminum alloy materials mainly include painting treatment method, ordinary anodic oxidation dyeing and sealing treatment method, hard anodic oxidation dyeing and sealing treatment method; There are...

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Problems solved by technology

The inventor found in the research that the aluminum alloy synergistic coating prepared by the process disclosed in CN1687488A has a certain degree of improvement in hardness, wear resistance, corrosion resistance and other properties compared with ordinary aluminum alloys, but when the aluminum alloy material is heated due to friction, After heating and other conditions cause the temperature of the aluminum alloy synergistic coating to rise, especially after the temperature rises above 160°C, the synergistic coating will show strong high-temperature viscosity (the high-temperature viscosity in the present invention refers to the coating on the metal surface. layer in a high-temperature environment), which seriously affects the use of aluminum alloys; for example, in the field of non-PVC bag-making, aluminum alloys prepared by CN1687488A process, aluminum alloy synergistic coatings and non-PVC bag-making products have adhesion phenomenon , which seriously affects the production efficiency of bag making

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