Surface treatment method for metal workpiece and dyeing pretreatment agent

A technology for pre-dying treatment and metal workpieces, which is applied in the direction of surface reaction electrolytic coating, anodizing, electrolytic coating, etc., and can solve the problem of uneven dyeing.
CN109837577AInactive Publication Date: 2019-06-04HONGFUJIN PRECISION ELECTRONICS ZHENGZHOU +1
14 Cites 13 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
HONGFUJIN PRECISION ELECTRONICS ZHENGZHOU
Publication Date
2019-06-04
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention provides a surface treatment method for a metal workpiece. The surface treatment method comprises the following steps that anodic oxidation treatment is performed on a metal workpiece soas to form an anodic oxidation film on the surface of the metal workpiece; the metal workpiece subjected to anodic oxidation treatment is placed in a dyeing pretreatment agent for activating treatment, wherein the dyeing pretreatment agent comprises composite organic acid and sodium acetate; the metal workpiece is placed in a dyeing solution for dyeing treatment; and hole sealing treatment is performed on the metal workpiece. The invention also provides the dyeing pretreatment agent. The surface treatment method for the metal workpiece comprises the step of activating treatment so that the residual acidic solution in a through hole or a blind hole of the metal workpiece can be removed, the phenomenon of uneven dyeing is avoided, and the dyeing quality is improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a surface treatment method for metal workpieces, in particular to a dyeing method for the surface of metal workpieces after anodic oxidation treatment and a pre-dyeing treatment agent. Background technique

[0002] Metal products, such as aluminum / aluminum alloy, magnesium / magnesium alloy or titanium / titanium alloy, are generally anodized to form an anodized film with better wear resistance on the surface. In order to diversify the surface color of the product, the product will be dyed after anodizing. However, during the anodizing process, the anodizing solution may penetrate into the through holes or blind holes of the product. Therefore, during the dyeing process, the metal product is prone to uneven dyeing due to the residual acidic anodizing solution . Contents of the invention

[0003] In view of this, it is necessary to provide a surface treatment method for metal workpieces and a pre-dyeing treatment agent to solve ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More