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Method for forming micro-nano holes in surface of stainless steel

A technology of micro-nano pores and stainless steel, which is applied in the field of metal corrosion, can solve the problems of difficulty in achieving sealing performance, affecting the bonding strength of adhesives, and difficulty in sizing.

Inactive Publication Date: 2017-09-22
SHENZHEN BULAIEN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional process mostly uses polymer adhesives or slotted structures to bond the two, and the gluing process has the following disadvantages: (1) It is difficult to control the uniformity of gluing; (2) Smaller areas Partial sizing is more difficult; (3), the back-end processing procedures are likely to affect the bonding strength of the adhesive; (4), during use, product vibration or the heat and energy released may easily lead to damage to the adhesive layer structure; ( 5) It is difficult to achieve good sealing performance when used alternately at high and low temperatures
There are also a number of related patent applications (CN02805359.1, CN200380104500.X, CN201110437796.3, CN200880008157.1, CN201510089137.3), but aluminum alloys have disadvantages such as low strength, poor corrosion resistance, and poor hand feeling, so other metals are used instead of aluminum Alloy has become the choice of many NMT manufacturers
Stainless steel is a relatively easy choice to replace aluminum alloy. The existing patents disclosed in this area have the disadvantages of unstable process and poor controllability.

Method used

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  • Method for forming micro-nano holes in surface of stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Put the stainless steel metal parts into the weakly acidic degreasing agent aqueous solution, and cooperate with ultrasonic cleaning at the temperature of 45-50 ℃.

[0021] 2. Wash the degreased stainless steel parts repeatedly with deionized water to remove the residue of degreasing agent on the surface.

[0022] 3. Use chemical corrosion to form pitting corrosion on the surface of stainless steel. The corrosion solution is composed of the following components: 100 parts of deionized water, 5 parts of nitric acid, 5 parts of sulfuric acid, 5 parts of hydrochloric acid, and 20 parts of malonic acid.

[0023] 4. Repeatedly immerse the degreased stainless steel parts in the above-mentioned corrosive solution, and clean it with deionized water after each immersion. The temperature of the corrosive solution is controlled at 45-50°C. The number of times is 10 times.

[0024] 5. Clean the chemically etched stainless steel parts repeatedly with deionized water, and bake th...

Embodiment 2

[0029] 1. Put the stainless steel metal parts into the weakly acidic degreasing agent aqueous solution, and cooperate with ultrasonic cleaning at a temperature of 50-55 °C.

[0030] 2. Wash the degreased stainless steel parts repeatedly with deionized water to remove the residue of degreasing agent on the surface.

[0031] 3. Use chemical corrosion to form pitting corrosion on the surface of stainless steel. The corrosion solution is composed of the following components: 100 parts of deionized water, 10 parts of nitric acid, 10 parts of sulfuric acid, 10 parts of hydrochloric acid, 10 parts of acetic acid, and succinic acid 10 servings.

[0032] 4. Repeatedly immerse the degreased stainless steel parts in the above-mentioned corrosive solution, and clean it with deionized water after each immersion. The temperature of the corrosive solution is controlled at 55-60°C. The number of times is 5 times.

[0033] 5. Clean the chemically etched stainless steel parts repeatedly with ...

Embodiment 3

[0038] 1. Put the stainless steel metal parts into the weakly acidic degreasing agent aqueous solution, and cooperate with ultrasonic cleaning at the temperature of 45-50 ℃.

[0039] 2. Wash the degreased stainless steel parts repeatedly with deionized water to remove the residue of degreasing agent on the surface.

[0040] 3. Use chemical corrosion to form pitting corrosion on the surface of stainless steel. The corrosion solution is composed of the following components: 100 parts of deionized water, 10 parts of nitric acid, 5 parts of sulfuric acid, 5 parts of hydrochloric acid, and 15 parts of malonic acid.

[0041] 4. Repeatedly immerse the degreased stainless steel parts in the above-mentioned corrosive solution, and clean it with deionized water after each immersion. The temperature of the corrosive solution is controlled at 65-70°C. The number of times is 3 times.

[0042] 5. Clean the chemically etched stainless steel parts repeatedly with deionized water, and bake th...

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Abstract

The invention discloses a method for forming micro-nano pores on the surface of stainless steel, which comprises the following steps: (1), first, degrease the stainless steel, and cooperate with ultrasonic cleaning at a temperature of 40-55°C; (2), degrease the stainless steel parts Repeatedly cleaning with deionized water; (3), using chemical corrosion, forming pitting corrosion on the surface of stainless steel with corrosive liquid; (4), repeatedly cleaning the stainless steel parts after chemical corrosion with deionized water, and cleaning them at 120‑140 Bake at ℃ for 20-40 minutes; (5) Perform electrochemical pore expansion corrosion on the dried stainless steel parts, and use single pulse current to perform electrochemical corrosion, so that micro-nano pores can be formed on the surface of the stainless steel. The nano-micropores formed on the surface of the stainless steel in the invention have a stable and controllable process, and after NMT injection molding, the obtained metal and plastic have high connection strength and good corrosion resistance.

Description

technical field [0001] The invention belongs to the field of metal corrosion and relates to a method for forming micro-nano holes on the surface of stainless steel. Background technique [0002] With the rapid development of the automobile industry, digital camera, personal computer and communication industries, in the structural design of many products, it is necessary to use a simple, low-cost and reliable process to combine metal and polymer materials. The traditional process mostly uses polymer adhesives or slotted structures to bond the two, and the gluing process has the following disadvantages: (1) It is difficult to control the uniformity of gluing; (2) Smaller areas Partial sizing is more difficult; (3), the back-end processing procedures are likely to affect the bonding strength of the adhesive; (4), during use, product vibration or the heat and energy released may easily lead to damage to the adhesive layer structure; ( 5) It is difficult to achieve good sealing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/06C23G1/08
CPCC25F3/06C23G1/088
Inventor 林少河雷霆李艳
Owner SHENZHEN BULAIEN TECH CO LTD