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Dyeing anode oxidization method of silicon bronze casting aluminum alloy

A cast aluminum alloy, anodic oxidation technology, applied in the direction of anodic oxidation, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems such as difficult to determine the pulse parameters, flow marks, unclear effect, etc., to achieve stable current rise and reduce flow scars, noticeable effect

Active Publication Date: 2014-07-23
JIANGSU RUIER LONGDING IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The existing method uses a DC pulse oxidation power supply, the pulse parameters are difficult to determine, and the effect is unknown
[0004] Obviously, the cost of oxidation power supply is high, which is unbearable for general small and medium-sized enterprises;
[0005] 2. The existing oxidation method oxidizes the product to be dyed unevenly, with flow marks, white leakage, etc.

Method used

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  • Dyeing anode oxidization method of silicon bronze casting aluminum alloy
  • Dyeing anode oxidization method of silicon bronze casting aluminum alloy

Examples

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Embodiment 1

[0029] This embodiment is to illustrate the application of the present invention in dyed anodic oxidation of silicon-copper cast aluminum alloy.

[0030] ①Preparation of samples: such as figure 1 It is a hydraulic valve body used in the car roof tilting system. It is made of cast aluminum A380 and requires black anodizing. The machined workpiece is placed in a vibration grinder for 20 minutes of vibration grinding.

[0031] ②Hang up the ground product, degrease, and ensure that the product is in full contact with the hanger when hanging.

[0032] ③ Put the degreased product into the stain removal solution (nitric acid: 50±5%, hydrofluoric acid: 2-3%, the rest of the ingredients are water, the above ratios are volume ratios) for treatment, the temperature is normal temperature, and the treatment time is 5 ~6 minutes.

[0033] ④ Anodizing bath preparation and anodizing treatment: Anodizing bath preparation, the anodizing bath is sulfuric acid oxidation bath, wherein the concen...

Embodiment 2

[0040] This embodiment is to illustrate the application of the present invention in dyed anodic oxidation of silicon-copper cast aluminum alloy.

[0041] ①Preparation of samples: such as figure 1 It is a hydraulic valve body used in the car roof tilting system. Its material is cast aluminum A380, which requires black anodizing. Put the machined workpiece into the vibration grinding machine for vibration grinding for 30 minutes.

[0042] ②Hang up the ground product, degrease, and ensure that the product is in full contact with the hanger when hanging.

[0043] ③ Put the degreased product into the stain removal solution (nitric acid: 50±5%, hydrofluoric acid: 2-3%, the rest of the ingredients are water, the above ratios are volume ratios) for treatment, the temperature is normal temperature, and the treatment time is 5 minute.

[0044] ④ Anodizing bath preparation and anodizing treatment: Anodizing bath preparation, the anodizing bath is sulfuric acid oxidation bath, wherein t...

Embodiment 3

[0051] This embodiment is to illustrate the application of the present invention in dyed anodic oxidation of silicon-copper cast aluminum alloy.

[0052] ①Preparation of samples: such as figure 1 It is a hydraulic valve body used in the car roof tilting system. It is made of cast aluminum A380 and requires black anodizing. The machined workpiece is placed in a vibration grinder for 25 minutes of vibration grinding.

[0053] ②Hang up the ground product, degrease, and ensure that the product is in full contact with the hanger when hanging.

[0054] ③ Put the degreased product into the stain removal solution (nitric acid: 50±5%, hydrofluoric acid: 2-3%, the rest of the ingredients are water, the above ratios are volume ratios) for treatment, the temperature is normal temperature, and the treatment time is 5 minute.

[0055] ④ Anodizing bath preparation and anodizing treatment: Anodizing bath preparation, the anodizing bath is sulfuric acid oxidation bath, wherein the concentrat...

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Abstract

The invention discloses a dyeing anode oxidization method of silicon bronze casting aluminum alloy, which comprises the following steps of vibration grinding, degreasing, dirt removing, anode oxidizing, treating through ethylic acid liquid, dyeing and sealing. The silicon bronze casting aluminum alloy prepared by using the dyeing anode oxidization method in the invention has the following characteristics: 1. dense scale cinder formed on the surface of a casting in the casting process is removed; 2. hydrofluoric acid and nitric acid with high concentration are used as dirt removing groove liquid to guarantee an excellent effect of removing silicon bronze on the surface of a workpiece; 3. a soft starting manner is adopted in the oxidization process to guarantee the stable increase of current and in-time dissipation of the generated heat at the initial oxidization stage and to prevent a product from being burnt; the voltage is slowly ascended to continuously generate oxidation films; and 4. acetic acid is used for cleaning after the oxidation procedure, and an acetic acid molecule is active enough to remove the residual sulfuric acid in the casting defect so as to reduce such defects as current ripples and crackles, and the like of the product generated in the successive dyeing procedure.

Description

technical field [0001] The present invention relates to a silicon-copper-aluminum alloy. Background technique [0002] In order to improve the mechanical properties and castability of aluminum, a certain amount of silicon and copper elements are often added to the aluminum metal. The addition of these alloying elements is indeed of great help to improve the mechanical properties and castability of the product. However, the addition of these elements has caused great difficulties to the anodic oxidation of the product, and the addition of silicon has made it difficult for the aluminum alloy to conduct electricity; to form an oxide film, it is necessary to maintain a certain voltage, and the existence of copper is likely to cause the product Dissolution of the copper-rich phase and even melting of the entire workpiece. In addition, the above existing solutions also have the following disadvantages: [0003] 1. The existing method uses a DC pulse oxidation power supply, the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/04C25D11/24
Inventor 吴晓杉
Owner JIANGSU RUIER LONGDING IND CO LTD
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