Preparation method of bionic super-lubricating composite anti-corrosion coating with self-restoration function

An anti-corrosion coating and super-lubricating technology, applied in coatings, surface reaction electrolytic coatings, metal material coating processes, etc.

Inactive Publication Date: 2020-08-28
ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to address the problems existing in the existing magnesium alloy coatings, to provide a self-repairable bionic superlubricating composite coating on the surface of magnesium alloys and its preparation method

Method used

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  • Preparation method of bionic super-lubricating composite anti-corrosion coating with self-restoration function
  • Preparation method of bionic super-lubricating composite anti-corrosion coating with self-restoration function
  • Preparation method of bionic super-lubricating composite anti-corrosion coating with self-restoration function

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Embodiment 1

[0030] (1) Preparation of micro-arc oxidation (MAO) film

[0031] Raw material components: electrolyte alkaline silicate system, composed of 15g / L Na 2 SiO 3 and 10g / L of KOH composition.

[0032] Preparation process: A double-pulse micro-arc oxidation power supply is used to perform micro-arc oxidation treatment on the magnesium alloy sample. The magnesium alloy sample is used as the anode, and the stainless steel plate is used as the cathode. The constant voltage mode is adopted. The power supply parameters are: voltage 300V, frequency 600Hz, duty cycle The ratio is 5%, and the processing time is 10 minutes. During the micro-arc oxidation process, the cooling water is continuously circulated and stirred continuously to keep the temperature of the electrolyte below 30°C.

[0033] (2)MoO 4 2- Preparation of Intercalated Layered Double Hydroxide (LDH) Membranes

[0034] Raw material composition: micro-arc oxidation pretreated magnesium alloy sample, MoO 4 2- Intercalate...

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Abstract

The invention discloses a preparation method of a bionic super-lubricating composite anti-corrosion coating with a self-restoration function. A micro-arc oxidation (MAO) film and a corrosion inhibition particle intercalated lamellar hydroxide (LDH) film are prepared on the surface of a magnesium-aluminum alloy, fluorine-containing silicone oil is injected, and therefore the functions such as surface super-lubricating and coating restoration are achieved. In the disclosed composite coating, WO4<2->, MoO4<2-> and other corrosion inhibition particles are intercalated into an MAO generated magnesium-aluminum lamellar hydroxide (MgAl-LDH) film, the corrosion inhibition particles mixed in intercalation can be released in a corrosive medium containing Cl<-> in a response manner, inspersed Cl<-> is captured through anion exchange, corrosive anions are released, and self-restoration of the corrosion resistance of the coating is achieved. Meanwhile, the fluorine-containing silicone oil on the surface can heal surface scratches through self-leveling under the condition without the help of external force, and therefore the capacity of self-restoration, super-superhydrophobicity and long-time corrosion resistance of the composite coating is achieved.

Description

technical field [0001] The invention belongs to the field of composite coatings, and relates to a micro-arc oxidation technology, in particular to a preparation method of a self-repairing bionic super-lubricating composite anti-corrosion coating. Background technique [0002] Magnesium alloy is the light alloy with the largest weight-to-strength ratio and excellent shock absorption performance among the existing metal structural materials, and it is the material of choice for the lightweight development of the equipment manufacturing industry. However, magnesium alloys are prone to oxidation and corrosion in humid environments, and the formed oxide film is loose, porous and uneven, which cannot effectively protect the magnesium alloy substrate as a stable passivation film, which seriously shortens the service life of magnesium alloy components. And restrict its wider application, so there is an urgent need for an appropriate surface treatment technology to modify the surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/30C23C18/12B05D5/08
CPCC25D11/026C25D11/024C25D11/30C23C18/1204C23C18/125B05D5/083
Inventor 胡青波赵鹏于金山郑中原管森森甘智勇郝春艳苏展于奔张佳成姜玲
Owner ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO
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