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A hydrophobic liquid-injected aluminum alloy surface with a liquid storage tank and its preparation method

A technology of aluminum alloy surface and liquid storage pool, which is applied in the direction of surface reaction electrolytic coating, coating, electrolytic coating, etc., and can solve problems such as no patent reports.

Active Publication Date: 2021-05-07
NANJING HYDRAULIC RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the storage, controlled release of lubricating fluid on the smooth liquid injection surface and the shielding of the discharged fluid after the lubricating fluid is consumed still need further research, and no relevant patent reports have been seen so far.

Method used

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  • A hydrophobic liquid-injected aluminum alloy surface with a liquid storage tank and its preparation method
  • A hydrophobic liquid-injected aluminum alloy surface with a liquid storage tank and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a hydrophobic liquid-injected aluminum alloy surface with a liquid reservoir includes an aluminum alloy substrate 1, on which a micro-arc oxidation coating 2 and a hydrophobic SiO 2 The nanoparticle sprayed layer 3; the aluminum alloy substrate 1 is etched with laser-etched micropores 4, the micro-arc oxidation coating 2 contains micro-arc oxidation self-generated micropores 5, hydrophobic SiO 2 The nanoparticle spray layer 3 contains nanoscale pores 6, and the laser-etched micropores 4, micro-arc oxidation self-generated micropores 5, and nanoscale pores 6 are connected to each other to form a liquid storage pool; perfluoropolyether oil is injected into it to form Perfluoropolyether oil is injected into layer 7.

Embodiment 2

[0035] Prepare a hydrophobic liquid injection surface with a liquid reservoir on 6061 aluminum alloy, the specific steps are as follows:

[0036](1) After the 6061 aluminum alloy substrate sample is polished step by step with 400-mesh and 600-mesh sandpaper, it is placed on the laser processing platform, and the micropore diameter is set to 150 μm and the transverse distance l is set by software. 1 and longitudinal spacing l 2 Both are 300μm, single-point laser etching 15 times at 15kHz laser beam processing frequency;

[0037] (2) After polishing the laser-etched surface with 1000-grit sandpaper, it was cleaned by ultrasonic oscillation for 10 minutes, and the depth of the laser-etched micropores measured by three-dimensional morphology was 50 μm;

[0038] (3) Weigh 12g sodium tripolyphosphate and 0.2g sodium hydroxide, dissolve in a stainless steel electrolytic cell filled with 1000mL deionized water, then immerse the polished laser-etched aluminum alloy sample in the elect...

Embodiment 3

[0044] Prepare a hydrophobic liquid injection surface with a liquid reservoir on 5083 aluminum alloy, the specific steps are as follows:

[0045] (1) After the 5083 aluminum alloy substrate sample was polished step by step with 400-mesh and 600-mesh sandpaper, it was placed on the laser processing platform, and the micropore diameter was set to 200 μm and the transverse spacing l 1 and longitudinal spacing l 2 Both are 200μm, single-point laser etching 10 times at 10kHz laser beam processing frequency;

[0046] (2) After polishing the laser-etched surface with 1000-grit sandpaper, it was cleaned by ultrasonic oscillation for 20 minutes, and the depth of the laser-etched micropores measured by three-dimensional morphology was 20 μm;

[0047] (3) Weigh 14g sodium tripolyphosphate and 0.6g sodium hydroxide, dissolve in a stainless steel electrolytic cell filled with 1000mL deionized water, then immerse the polished laser-etched aluminum alloy sample in the electrolyte as an anod...

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Abstract

The invention discloses a hydrophobic liquid-injected aluminum alloy surface with a liquid storage tank and a preparation method thereof. The hydrophobic liquid-injected aluminum alloy surface with a liquid storage tank includes an aluminum alloy base body, and micro-arcs are sequentially arranged on the aluminum alloy base body. Oxide coating and hydrophobic SiO 2 Nanoparticle spray coating; laser-etched micropores are etched on the aluminum alloy substrate, and the micro-arc oxidation coating contains micro-arc oxidation self-generated micropores, hydrophobic SiO 2 The nano-particle spray layer contains nano-scale pores, laser-etched micro-pores, micro-arc oxidation self-generated micro-pores, and nano-scale pores are interconnected to form a liquid storage pool; perfluoropolyether oil is injected into it to form a perfluoropolyether oil injection layer . The invention integrates the morphological characteristics of laser-etched micropores and self-generated micropores of the coating, and forms a multi-layer gradient distribution liquid storage pool with micron-scale and nano-scale pore structures from the bottom layer to the top layer on the aluminum alloy substrate, so that there is a reservoir The hydrophobic liquid-injected aluminum alloy surface of the liquid pool has the functions of lubricating liquid storage, replenishment and controlled release.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy anticorrosion, in particular to a hydrophobic liquid-injected aluminum alloy surface with a liquid storage tank and a preparation method thereof. Background technique [0002] The pitcher leaf orifice of Nepenthes is completely wetted by rain, dew, or nectar, forming a very slippery surface, allowing insects that rest on it to slide down into the pitcher. Inspired by this, Aizenberg et al. designed a Nepenthes-like smooth liquid-infused porous surface (SLIPS), in which the roughened micro-scale and nano-scale topography is the key part of SLIPS for locking lubricating liquid [Chinese patent 201280012210.1]. Injecting a lubricating liquid that is incompatible with the displaced liquid on the super-slip surface forms a solid-oil-water contact interface, which can prevent the adhesion of corrosive liquid on the surface of the material and reduce the probability of corrosion. [0003] At prese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/06C25D11/16C25D11/24
CPCC25D11/026C25D11/06C25D11/16C25D11/246
Inventor 秦永坤李岩徐宁朱锡昶
Owner NANJING HYDRAULIC RES INST
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