Repair method for aluminum coating of composite material

Abstract

The invention relates to a repair method for an aluminum coating of a composite material. The repair method includes the following steps that firstly, a damaged position is ground, wherein the aluminum coating damaged area on the surface of the composition material is confirmed, and the aluminum coating damaged area is subjected to grinding pretreatment through abrasive paper; secondly, a repair area is designated, wherein the portion beyond the repair area is covered with paper adhesive tape and craft paper; thirdly, repairing is performed, wherein an aluminum coating is sprayed to a to-be-repaired area through a spraying device; fourthly, coating detection is performed, wherein the repaired aluminum coating is subjected to resistance measurement through a spray aluminum coating resistance detector; and fifthly, within 24 hours of repairing of the aluminum coating, a layer of epoxy hole sealing agent is sprayed on the repair area. The repair method is easy to operate, consumable items in use are cheap and easy to obtain, the damaged spray aluminum coating can be effectively restored, operation can be performed indoors, and the defects in the method of the prior art are overcome. Because local repairing is adopted, compared with overall spraying in the prior art, damage to a composite material base body is relieved as much as possible, and the repair quality is guaranteed.

Description

technical field [0001] The invention relates to the technical field of coating repair technology, in particular to an aluminum coating repair method for composite materials. Background technique [0002] In order to meet the surface electrical properties of composite materials, a layer of aluminum coating is usually prepared on the surface of composite materials. When composite materials are used, such as when used as aircraft parts, on the one hand, they will be affected by the external environment such as wind and sand erosion and sandstone impact during flight; on the other hand, they will be affected by tools, etc. The aluminum coating on the surface of the composite material is partially damaged due to bumping and scratching by hard objects, or due to structural repair of the composite material, thereby affecting the surface electrical properties of the composite material. [0003] At present, there are methods for preparing aluminum coatings on the surface of composit...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the most commonly used repair method is to remove all the aluminum coating on the surface of the composite material and then re-prepare it. However, this method has a large workload, high cost, and waste of resources. The composite material is easily damaged when the aluminum coating is removed. matrix, which induces derivative defects

People need a repair method that can combine the characteristics of composite materials and its surface aluminum coating preparation method and the actual situation of the production site to solve the shortcomings of the existing technology, such as heavy workload and easy to generate derivative defects.