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Surface treatment method for metal substrate, the metal substrate, and metal-resin composite and production method of same

A technology of metal matrix and metal resin, applied in the direction of coating, etc., can solve the problems of poor bonding force, difficult to remove, and inability to achieve seamless bonding between stainless steel and resin, and achieve the effect of improving bonding force and excellent bonding force

Active Publication Date: 2016-04-20
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the method of using adhesive has poor bonding force, is not resistant to acid and alkali, and the adhesive has a certain thickness, which is not suitable for areas with complex shapes, and cannot realize the seamless combination of stainless steel and resin; the method of chemical or electrochemical corrosion , some will cause severe corrosion on the surface of stainless steel, difficult to remove after subsequent treatment, which is not conducive to the surface decoration of the appearance surface; while some are slightly corroded, so that they can only be effective for specific resins, thus limiting their scope of use

Method used

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  • Surface treatment method for metal substrate, the metal substrate, and metal-resin composite and production method of same
  • Surface treatment method for metal substrate, the metal substrate, and metal-resin composite and production method of same
  • Surface treatment method for metal substrate, the metal substrate, and metal-resin composite and production method of same

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0044] Take a SUS304 stainless steel plate with a thickness of 1mm, cut it into a rectangular piece of 15mm×80mm, put it into a polishing machine for polishing, and then perform degreasing, water washing, sandblasting, water washing, and drying at 80°C in sequence. Obtain a stainless steel substrate.

Embodiment 1

[0046] This example is used to illustrate the surface treatment method of the metal substrate of the present invention, the metal substrate prepared by this method, and the metal-resin composite body and its manufacturing method.

[0047] Put the stainless steel substrate prepared in Preparation Example 1 into a mixed solution of 10% by weight sulfuric acid and 10% by weight phosphoric acid, soak at 40°C for 120 minutes for pretreatment, and form irregular corrosion holes on the stainless steel substrate; Then, take out the stainless steel substrate, wash it with water, and then put it into 30% by weight of sodium hydroxide solution, use the carbon plate as the cathode, and the stainless steel substrate as the anode, conduct electrochemical corrosion at 3V for 3min, to remove the pretreated After removing the black ash layer on the surface of the metal substrate, take out the stainless steel substrate obtained after electrochemical corrosion and wash and dry to obtain the surfa...

Embodiment 2

[0052] This example is used to illustrate the surface treatment method of the metal substrate of the present invention, the metal substrate prepared by this method, and the metal-resin composite body and its manufacturing method.

[0053] Put the stainless steel substrate prepared in Preparation Example 1 into a mixed solution of 10% by weight sulfuric acid and 10% by weight phosphoric acid, soak at 40°C for 120 minutes for pretreatment, and form irregular corrosion holes on the stainless steel substrate; Then, the stainless steel substrate is taken out, washed with water, and soaked in a mixed acid solution for 60 minutes, wherein the mixed acid solution is a mixed acid solution of phosphoric acid and nitric acid, and the concentration of the mixed acid solution is 25% by weight, so as to remove After the black ash layer on the surface of the metal substrate after pretreatment, the stainless steel substrate obtained after chemical immersion is taken out and washed and dried to...

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Abstract

The invention discloses a surface treatment method for a metal substrate, the metal substrate prepared therethrough, and a metal-resin composite and a production method of the same. The surface treatment method includes the steps of (1) pre-treating the metal substrate with a mixed acid solution composed of two or more of sulfuric acid, citric acid and phosphorus acid to form irregular corroded holes in the surface of the metal substrate; and (2) performing electrochemical corrosion to the metal substrate in an alkaline solution or chemically soaking the metal substrate in an acidic solution. The metal substrate subjected to the surface treatment is placed into a die to perform injection moulding through a thermoplastic resin composition to obtain the integrated metal-resin composite. The invention also provides the production method of the integrated metal-resin composite which is excellent in binding force. The production method is easy to carry out and low in cost.

Description

technical field [0001] The invention relates to a surface treatment method of a metal matrix, a metal matrix obtained after the surface treatment, a metal resin composite body and a manufacturing method thereof. Background technique [0002] At present, there are two main methods of combining metal (stainless steel) and resin: one is to use adhesive, and the chemical adhesive acts on stainless steel and resin respectively, so as to combine the two together; the other is to use chemical or electrical In a chemical way, holes are corroded on the surface of stainless steel, and then resin and stainless steel are combined by injection molding. [0003] However, the method of using adhesive has poor bonding force, is not resistant to acid and alkali, and the adhesive has a certain thickness, which is not suitable for areas with complex shapes, and cannot realize the seamless combination of stainless steel and resin; the method of chemical or electrochemical corrosion , some will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/14C23F1/28C25F3/06
Inventor 章晓刘莎莎孙剑陈梁
Owner BYD CO LTD
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