41results about How to "Seawater corrosion resistant" patented technology

The invention discloses a strain monitoring two-dimensional winding composite material underwater vehicle shell and a preparation method thereof. The underwater vehicle shell comprises three parts from inside to outside: a metal sealing layer, a rigid strength layer and a corrosion-resistant layer, wherein the rigid strength layer is prepared by adopting a plurality of carbon fiber mixing and combination modes on the surface of the metal sealing layer, so that the underwater vehicle shell can adapt to different complicated underwater environments; the corrosion-resistant layer is prepared from chopped fiber reinforced resin matrix composite materials, so that the surface not only has the characteristic of resisting seawater corrosion, but also achieves the purpose of promoting the binding strength through the reinforcement action of the chopped fibers so as to effectively guarantee the service life. Through the embedding use of optical fibers or strain gauges or other different forms of strain inductors in the structure of the two-dimensional winding composite material rigid strength layer, the small strain of the whole shell structure or structure inner layer under high external pressure condition can be effectively perceived, and the real-time monitoring on the service status change of the underwater vehicle shell can be achieved.

The invention discloses an intelligent monitoring three-dimensional composite underwater vehicle shell body and a preparation method of the intelligent monitoring three-dimensional composite underwater vehicle shell body. The underwater vehicle shell body comprises a plurality of layers of structures from exterior to interior and comprises four parts of a corrosion resistance layer, an impact resistance layer, a rigidity layer and a metal sealing layer, one or more strain sensors is / are adopted in the impact resistance layer and the rigidity layer of a three-dimensional composite structure at the same time and introduced into the three-dimensional composite structure, and the stress state of the structure of the shell body is monitored through sensing of the micro-strain of the shell body in the working process. The three-dimensional prefabricated part structure guarantees the mechanical stability of the whole shell body, meanwhile, due to the arrangement of the impact resistance layer and the rigidity layer, the composite underwater vehicle shell body can adapt to different complex underwater environments.

The invention discloses a method for performing anticorrosive hydrophobic modification on the surface of an aluminum alloy, which belongs to the technical field of corrosion prevention. The method specifically comprises the following steps of: (1) performing surface degreasing and oil removing on an aluminum alloy material by using conventional alkaline degreasing solution first, performing surface activation treatment by using reductive acidic cleaning solution, and then performing inactivation and sealing treatments on the activated surface; (2) preparing a composition with a hydrophobic effect, wherein the composition consists of a first component and a second component in a weight ratio of 9-16:1, the first component is prepared from the following materials in percentage by weight: 35to 60 percent of fluorocarbon resin, 10 to 40 percent of anticorrosive pigment, 1 to 8 percent of organosilicon compound, 0.5 to 5 percent of dispersing agent, 0.5 to 3 percent of anti-settle agent and 10 to 40 percent of organic solvent, and the second component is a fatty series / aromatic series curing agent; and (3) performing anticorrosive hydrophobic modification on the surface of the aluminum alloy, namely coating the composition with the hydrophobic effect in the step (2) on the surface of the aluminum alloy after treatment in a brush coating, spray coating or dip coating mode, and curing the surface for about 12 hours. The anticorrosive hydrophobic coating layer obtained on the surface of the aluminum alloy by using the technique of the invention has the advantages of thin coating layer thickness, high adhesive force, sea water corrosion resistance, surface super-hydrophobic property and the like.