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Surface plating Ni-P layer method for improving corrosion resistance of metal-matrix composite material

A technology of composite materials and surface chemistry, which is applied in the field of chemical plating on the surface of metal matrix composite materials, can solve the problems of low bonding strength between the coating and the metal substrate, pretreatment process of coating easy to fall off, uneven coating thickness, etc., and achieve high bonding strength , uniform thickness, and reduced corrosion current density

Inactive Publication Date: 2012-04-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low bonding strength between the coating and the metal substrate, uneven thickness of the coating, easy peeling off of the coating and complicated pretreatment process in the existing surface electroless plating process of metal matrix composite materials, and to provide a method for improving metal plating. The Method of Electroless Plating Ni-P Layer on the Surface of Composite Material Corrosion Resistance

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  • Surface plating Ni-P layer method for improving corrosion resistance of metal-matrix composite material
  • Surface plating Ni-P layer method for improving corrosion resistance of metal-matrix composite material

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specific Embodiment approach 1

[0008] Specific Embodiment 1: In this embodiment, the method for electroless plating Ni-P layer on the surface of the metal matrix composite material to improve the corrosion resistance is realized by the following steps: 1. Pre-grinding the metal matrix composite material to a surface roughness of 0.01-10 μm, Then place it in absolute ethanol for ultrasonic cleaning for 1-5 minutes, then rinse it with deionized water for 10-30 seconds, and then place it in acetone for ultrasonic cleaning for 1-5 minutes, then rinse it with deionized water for 10-30 seconds; The metal matrix composite material is placed in a NaOH solution with a concentration of 0.5-3mol / L for 1-180s, then ultrasonically cleaned in deionized water for 10-30s, and then placed in an electroless plating solution at 60-100°C After dipping for 1-120min, the electroless Ni-P layer on the surface of the metal matrix composite material is completed; the electroless plating solution in step 2 consists of 0.057-0.152mol / ...

specific Embodiment approach 2

[0010] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, the metal matrix composite material is pre-grinded to a surface roughness of 0.05-8 μm, and then ultrasonically cleaned in absolute ethanol for 2-4 minutes. Rinse again with deionized water for 15-25s, place in acetone for ultrasonic cleaning for 2-4min after rinsing, and then rinse with deionized water for 15-25s. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0011] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 is that in step 1, the metal matrix composite material is pre-grinded to a surface roughness of 0.1-6 μm, and then ultrasonically cleaned in absolute ethanol for 2.5-3.5 minutes , and then rinsed with deionized water for 18-22s, and then placed in acetone for ultrasonic cleaning for 2.5-3.5min, and then rinsed with deionized water for 18-22s. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention provides a method of Ni-P surface chemical plating for improving the corrosion resistance of metal matrix composites, which relates to a method of surface chemical plating of metal matrix composites. The invention solves the problems in the existing technology of surface chemical plating of metal matrix composites that the bonding strength of a coating and a metal matrix is low; thecoating thickness is not uniform; and the coating falls out easily and the pre-treatment process is complicated. The method includes the following steps: firstly, the metal matrix composites are pre-ground, are sequentially put into absolute ethyl alcohol and acetone for ultrasonic cleaning and are washed again; secondly, the washed metal matrix composites are put into NaOH solution for treatment, then placed into the deionized water for ultrasonic cleaning and then dipped into a chemical plating solution to complete the Ni-P surface chemical plating. In the invention, the bonding strength ofthe coating of the surface and metal matrix of metal matrix composites is high; after the electrochemical corrosion is finished, the coating does not fall off; no foaming phenomenon exists; the thickness is uniform; and the pre-treatment reduces the cost and the process is simple.

Description

technical field [0001] The invention relates to a method for electroless plating on the surface of a metal matrix composite material. Background technique [0002] The corrosion resistance of metal matrix composites is significantly reduced due to the addition of reinforcements, which limits the use of metal matrix composites in various complex environments. The anti-corrosion technologies of metal matrix composites include anodic oxidation, conversion coating, electroplating and electroless plating. In contrast, the advantages of electroless plating technology are more prominent. The surface of metal matrix composites is treated with electroless Ni-P technology to make it have good corrosion resistance. However, the current surface electroless plating process of metal matrix composites has low bonding strength between the coating and the metal matrix, uneven thickness of the coating, blistering on the surface of the coating, easy peeling off of the coating and pretreatment ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/36B08B3/12
Inventor 胡津王翠菊
Owner HARBIN INST OF TECH
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