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Nickeling method for metal-matrix composite

A technology of composite materials and metal materials, applied in the field of nickel plating, to achieve the effect of good combination, simple and fast process

Inactive Publication Date: 2011-02-16
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 problem of low corrosion resistance of the film formed on the surface of the composite material in the prior art, and to provide a metal matrix composite material plating nickel method

Method used

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  • Nickeling method for metal-matrix composite
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  • Nickeling method for metal-matrix composite

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specific Embodiment approach 1

[0011] Embodiment 1: In this embodiment, the nickel plating solution per liter of metal matrix composite material consists of 0.1-0.5 mol of NiSO 4 ·6H 2 O, 0.01-0.1mol of NiCl 2 ·6H 2 O, 0.02-0.10mol of H 3 PO 4 , 0.05~0.2mol of H 3 PO 3 , 0.01~0.05mol of C 6 h 8 o 7 ·H 2 O and the balance of water.

[0012] The metal matrix composite material in this embodiment adopts Al with a diameter of 1-10 μm and a length of 10-30 μm. 18 B 4 o 33 Whiskers are reinforcements. The chemical composition (mass%) is: 2024 aluminum alloy with 4.4% Cu, 1.5% Mg, 0.5% Mn, 0.5% Si and less than 0.5% Fe as the base. Al with a volume fraction of about 20% was prepared by squeeze casting 18 B 4 o 33 / 2024Al composite. At a current density of 1000A / m 2 , the solution pH value is 2, under the condition of 55 ℃, use NiSO 4 ·6H 2 The concentration of O is 0.46mol / L, NiCl 2 ·6H 2 O concentration is 0.08mol / L, H 3 PO 4 The concentration is 0.08mol / L, H 3 PO 3 Plating solution wit...

specific Embodiment approach 2

[0015] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the nickel plating solution per liter of metal matrix composite material consists of 0.15-0.2 mol of NiSO 4 ·6H 2 O, 0.02-0.04mol of NiCl 2 ·6H 2 O, 0.03-0.05mol of H 3 PO 4 , 0.06~0.09mol of H 3 PO 3 , 0.015~0.02mol of C 6 h 8 o 7 ·H 2 O and the balance of water. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0016] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the nickel plating solution per liter of metal matrix composite material consists of 0.25-0.3 mol of NiSO 4 ·6H 2 O, 0.05-0.09mol of NiCl 2 ·6H 2 O, 0.06-0.09mol of H 3 PO 4 , 0.1~0.19mol of H 3 PO 3 , 0.03~0.04mol of C 6 h 8 o 7 ·H 2 O and the balance of water. Others are the same as in the first embodiment.

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Abstract

Nickel plating solution of metal matrix composites and a method for plating nickel relate to the nickel plating solution and the method for plating the nickel. The invention solves the problem that the anti-corrosion capacity of film which is formed on the surface of composite materials is little in an existing technique. The nickel plating solution of the invention has components of NiSO4.6H2O, NiCl2.6H2O, H3PO4, H3PO3 and C6H8O7.H2O. The method for plating the nickel comprises following steps: keeping the metal matrix composites in phosphoric acid for 30 seconds to 2 minutes after washing the metal matrix composites with ultrasound, then, putting the metal matrix composites in the nickel plating solution, and plating. The pit corrosion potential of the metal matrix composites which are processed through the method of the invention is increased by 300-900mV, the differential value between the pit corrosion potential and the corrosion potential is increased by 300-600mV, and the corrosion current density is lowered by 2-3 magnitudes.

Description

technical field [0001] The invention relates to a nickel plating method. [0002] Background technique [0003] Metal matrix composites are considered to be one of the most promising new structural materials in the fields of aerospace, aviation and automobile industries. However, the addition of reinforcements notably improves the mechanical and mechanical properties of the metal on the one hand, but on the other hand also increases the degree of inhomogeneity in the internal structure of the material, resulting in a decrease in its corrosion resistance, which limits the use of metal matrix composites in various complex applications. use in the environment. For a long time, people have used anodic oxidation and chromate chemical oxidation to improve the corrosion resistance of metals, but these two methods have various disadvantages (due to the poor conductivity of composite materials, anodic oxidation is very difficult to It is difficult to form a uniform film on the surf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/12
Inventor 胡津张璋迟庆新
Owner HARBIN INST OF TECH
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