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Low stress, antiwear and antifriction gradient Ni-Co nanometer alloy plate preparation method

A nano-alloy, low-stress technology, applied in the preparation of anti-wear and anti-friction gradient Ni-Co nano-alloy coatings, low-stress field, can solve the problems of large internal stress and single function of nano-alloy coatings, and achieve high wear resistance, The effect of simple operation and small investment

Inactive Publication Date: 2008-12-10
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

So as to solve the problem of large internal stress and single function of nano-alloy coating

Method used

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  • Low stress, antiwear and antifriction gradient Ni-Co nanometer alloy plate preparation method
  • Low stress, antiwear and antifriction gradient Ni-Co nanometer alloy plate preparation method
  • Low stress, antiwear and antifriction gradient Ni-Co nanometer alloy plate preparation method

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Embodiment 1

[0019] The pure nickel sheet is used as the anode, and the workpiece to be processed is used as the cathode. The solution composition of electrodeposition gradient Ni-Co nano-alloy coating is as follows: every liter of electrolyte contains 200 grams of nickel sulfate, 20 grams of sodium chloride, 30 grams of boric acid, 0-80 grams of cobalt chloride and 1-4 grams of sodium saccharinate . Maintain the plating temperature at 40-45°C, the pH value of the plating solution is 3-4.5, and the current density is 3-5A / dm 2 . The steel and copper metal workpieces after conventional chemical degreasing and acid activation are electro-deposited according to the above-mentioned plating solution composition and process conditions. During the deposition process, the cobalt salt concentration is gradually increased and the corresponding deposition is controlled according to the process shown in Table 1. time (see Table 1), a gradient Ni-Co nano-alloy coating with a thickness greater than 15...

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Abstract

The invention discloses a preparation method to low-stress antifriction gradient Ni-Co nano alloy plating coat and overcomes the problems in prior art that has large inner stress, low bond strength and weak antifriction property. In this invention, using electrodeposition method, preparing the plating coat by adding cobalt salt concentration and controlling opposite eletrodeposition time in basic electrolyte contained nickel sulfate and cobalt chloride. The coat has condensed structure, smooth surface, and fixed bond with Co-content varies along gradient. The advantages of this invention include: reducing coat stress efficiently, shows well properties, and can be used in precisealloy electroforming product.

Description

technical field [0001] The invention relates to a method for preparing a gradient Ni-Co nano-alloy coating with low stress, anti-wear and anti-friction. Background technique [0002] Compared with conventional crystalline materials, nanocrystalline materials have a series of unique physical and chemical properties, and have attracted extensive attention from the scientific and industrial circles as a class of advanced materials. As an important type of nanomaterials, nanoalloys have gradually become ideal for many industrial applications. There are many methods for preparing nano-alloys, among which the electrodeposition method has the advantages of simple equipment, low energy consumption, low deposition temperature, easy operation and low cost. The research on the relationship between the nano-alloy grain size and stress shows that the nano-alloy coating will generate high internal stress during the electrocrystallization process, which will cause peeling and cracking of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/56
Inventor 徐洮王立平薛群基
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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