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Surface treatment liquid and method for surface treatment of magnesium alloy aluminum alloy composite parts

A surface treatment liquid and surface treatment technology, applied in the direction of surface reaction electrolytic coating, coating, electrolytic coating, etc., can solve the problems of many steps and cumbersome operation

Active Publication Date: 2020-09-22
东莞市慧泽凌化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although aluminum alloy and magnesium alloy composite parts can be nano-injected by forming a microporous layer on the surface through the above method, there are still many inconveniences such as cumbersome operation and many steps.

Method used

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  • Surface treatment liquid and method for surface treatment of magnesium alloy aluminum alloy composite parts
  • Surface treatment liquid and method for surface treatment of magnesium alloy aluminum alloy composite parts
  • Surface treatment liquid and method for surface treatment of magnesium alloy aluminum alloy composite parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050]The composition of surface treatment liquid: phosphoric acid is 120g / L, fluozirconic acid is 15g / L, sodium tungstate is 5g / L, phytic acid is 5g / L, and glycerol is 5g / L. The flow chart of the processing process is shown in Table 1. The composite part is a tablet computer frame, the frame is 6063 aluminum alloy, and the middle plate is AZ91D magnesium alloy. Special injection molding positions for thrust measurement are reserved on the aluminum alloy and magnesium alloy parts. Refer to Table 1 for the specific processing process, and the process is as follows:

[0051] Degreasing and degreasing: Hang the composite part firmly on the titanium rack, soak it in a commercially available neutral degreaser (CW-6007 produced by Huiling Technology) for 300 seconds, then wash it with water, and set the temperature to 60°C;

[0052] Immersion activation: soak the composite parts after degreasing and degreasing in 25% hydrofluoric acid aqueous solution for 40 seconds, then wash them ...

Embodiment 2

[0059] The difference from Example 1 is that in the present example, the composition of the surface treatment solution is adjusted as follows: phosphoric acid is 120g / L, fluozirconic acid is 15g / L, sodium molybdate is 2g / L, sodium tungstate is 4g / L L, phytic acid is 6g / L, and glycerol is 5g / L. Other treatment methods and processes are exactly the same as in Example 1. The measured bonding strength between the aluminum alloy part and the plastic PPS on the composite part is 42.6MPa, and the bonding strength between the magnesium alloy part and the plastic PPS is 25MPa.

Embodiment 3

[0061] The difference from Example 1 is that in this example, the composition of the surface treatment solution is adjusted as follows: phosphoric acid is 180g / L, fluosilicic acid is 3g / L, fluotitanic acid is 10g / L, sodium molybdate is 5g / L L, phytic acid is 5g / L, polyethylene glycol is 8g / L. Other treatment methods and processes are exactly the same as in Example 1. The measured bonding strength between the aluminum alloy part and the plastic PPS on the composite part is 41.8MPa, and the bonding strength between the magnesium alloy part and the plastic PPS is 27MPa.

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Abstract

The invention discloses surface treatment fluid for surface treatment of magnesium alloy and aluminum alloy composite parts and a method. The surface treatment fluid comprises inorganic acid, fluoride, a corrosion inhibition film-forming agent and an addition agent. The surface treatment fluid cannot cause the phenomenon that the aluminum alloy portions and the magnesium alloy portions on the composite parts are blackened and excessively corroded. By the adoption of the method of direct forming combination of the magnesium alloy and aluminum alloy composite parts treated by the surface treatment fluid and plastic, the magnesium alloy and aluminum alloy composite parts can be subjected to anodic oxidation in the same surface treatment fluid at the same time under the condition that a covering method and other methods are not used, and therefore uniform holes or a uniform rough surface is generated on the surface, and the magnesium alloy and aluminum alloy composite parts and the plasticare prompted to be subjected to direct injection molding and have the high binding strength. By the adoption of the method, the operating steps of nanometer injection molding of the magnesium alloy and aluminum alloy composite parts are simplified, the cost is reduced, and the production efficiency and the yield are effectively improved.

Description

technical field [0001] The invention belongs to the field of surface treatment, and in particular relates to a surface treatment liquid for surface treatment of a magnesium alloy aluminum alloy composite part and a method for directly forming and combining the magnesium alloy aluminum alloy composite part and plastic after being treated by the surface treatment liquid. Background technique [0002] In the fields of mobile communication equipment, electronic and electrical equipment, and automobile machinery, in order to achieve the purpose of reducing product weight, increasing bonding strength, and reducing electromagnetic shielding, metal and resin integrated molding technology has been widely developed and fully applied. Many patents related to the integrated nano-injection molding technology of various materials, the main purpose of which is to obtain a rough surface with a certain concave-convex structure on the surface of the substrate by surface treatment of the substr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/08C25D11/30C25D11/16C25D11/18B29C45/14B29K705/00B29K705/02
Inventor 张兵金磊
Owner 东莞市慧泽凌化工科技有限公司
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