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Dyeing method for micro-arc treatment metal workpiece

A technology of metal workpieces and dyeing methods, applied in the field of dyeing, can solve the problems of affecting the assembly precision or reliability, losing the mechanical properties of ceramic texture of micro-arc oxidation layer, etc.

Active Publication Date: 2017-11-10
FENG CHIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, electrophoretic coating uses the principle of electroplating to precipitate water-soluble and ionized coating resin on the electrode, thereby forming an insoluble coating and covering the micro-arc oxidation layer. Although it adds color to the oxide layer, it also loses it at the same time. Ceramic texture and superior mechanical properties of the micro-arc oxidation layer
In addition, apart from the poor adhesion of the colored layer painted by electrophoretic coating or spraying, because the colored layer has a certain thickness, if it is an appearance assembly, whether it will affect the precision or reliability of assembly is still a considerable issue. doubts

Method used

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specific Embodiment 1

[0044] see Figure 1a to Figure 1d As shown, it is a schematic diagram of the pretreatment of the dyeing method of the micro-arc treatment metal workpiece of the present invention. see Figure 2a to Figure 2d Shown is a schematic diagram of the dyeing process of the dyeing method of the micro-arc treatment metal workpiece of the present invention.

[0045] The micro-arc treated metal workpiece 1 is composed of a metal substrate 12 and a micro-arc oxidation layer 11 obtained after micro-arc treatment, and has a first color, or uses other alloys as the metal substrate, but is not limited thereto. The micro-arc oxidation layer 11 is a membranous structure with a large number of open and closed pores in the micron scale.

[0046] A dyeing method for micro-arc processing metal workpieces, comprising the following steps:

[0047] (1) Pretreatment

[0048] (11) If Figure 1a As shown, first add the pretreatment solution 21 into the reaction tank 2, then put the micro-arc treated ...

specific Embodiment 2

[0068] Roughly the same as the specific example 1, the difference is only that the green anionic organic dye is used, and the dyeing of the metal workpiece by micro-arc treatment is carried out according to the method of the specific example 1, and the dyeing result is as follows Figure 4b And as shown in Table 1, the chromaticity value (L*a*b*)=(75.93,-2.59,35.63) of the micro-arc treated metal workpiece 1b treated with the green anionic organic dye.

specific Embodiment 3

[0069] Roughly the same as the specific example 1, the difference is only that the blue anionic organic dye is used, and the method for micro-arcing the metal workpiece is dyed according to the method of example 1, and the dyeing result is as follows Figure 4c As shown in Table 1, the chromaticity value of the micro-arc treated metal workpiece 1c treated with the blue anionic organic dye is (L*a*b*)=(52.48, 2.98, -36.48).

[0070] To sum up, the present invention proposes a dyeing method for micro-arc treatment of metal workpieces, hoping to provide a different way of thinking and practice for the industry to apply this coloring technology. The technical solution of the present invention includes pretreatment and dyeing treatment, through these two steps, the dyestuff can be effectively attached to the micro-arc oxidation layer to achieve the effect of dyeing.

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Abstract

The invention provides a dyeing method for a micro-arc treatment metal workpiece. The dyeing method includes the following steps that pretreatment is conducted on the micro-arc treatment metal workpiece firstly so that multiple charge channels can be formed in a micro-arc oxidation layer of the micro-arc treatment metal workpiece; and then dyeing treatment is conducted, anion dye particles are adsorbed in the charge channels of the micro-arc oxidation layer so that the micro-arc treatment metal workpiece can have a second color. Due to the two steps including pretreatment and dyeing treatment, dye can be adsorbed to the micro-arc oxidation layer, in other words, the anion dye particles are adsorbed in the charge channels of the micro-arc oxidation layer, and the dyeing effect is achieved.

Description

technical field [0001] The invention relates to a dyeing method, in particular to a dyeing method for micro-arc treatment of metal workpieces. Background technique [0002] Micro-arc oxidation (MAO) is based on anodic oxidation, using high voltage to produce micro-arc discharge on the surface of metal workpieces treated with micro-arc, and it can be used on passivated light metals such as aluminum, magnesium, titanium or their alloys. The metal surface formed by micro-arc oxidation on the surface has high hardness and good corrosion resistance. It is a new electrochemical surface treatment technology. Different countries have different perceptions of this technology, so they have different names, such as Microarc discharge oxidation (MDO), Microplasma oxidation (MPO), Anodic spark deposition (Anodic spark deposition), spark discharge anode Oxidation (Anodischen oxidation unterfunkenentladung, ANOF-process), spark discharge oxidation (Spark discharge oxidation) and plasma el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/24C25D11/14C25D11/06
CPCC25D11/026C25D11/06C25D11/14C25D11/243
Inventor 何主亮陈俊名
Owner FENG CHIA UNIVERSITY
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