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A Method for Improving Uniformity During Spray Electrodeposition Processing

A spray electrodeposition, processing technology, applied in the field of improving uniformity

Active Publication Date: 2019-05-03
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the structure of the damaged part of the part to be repaired is relatively complex, it is more difficult to use the existing electrodeposition method for repairing

Method used

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  • A Method for Improving Uniformity During Spray Electrodeposition Processing
  • A Method for Improving Uniformity During Spray Electrodeposition Processing
  • A Method for Improving Uniformity During Spray Electrodeposition Processing

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0039] The present invention provides the following specific implementation methods: Embodiment 1: 1) Substrate surface pretreatment. In order to obtain better bonding force and smooth and fine coating, the following pretreatment procedures are required: ① Polishing treatment: first use 400-mesh metallographic sandpaper to polish the surface of the substrate such as a stainless steel substrate to remove its oxide layer, and then use 800, 1000-mesh gold Grinding and polishing with sandpaper to ensure that the surface of the substrate reaches a certain roughness; ②Surface cleaning: Clean the surface of the substrate with distilled water, and then soak and scrub with acetone for about 5 minutes for degreasing treatment. ③Surface etching treatment: Put the stainless steel substrate in 10% dilute sulfuric acid solution for 5 minutes for passivation treatment; ④Clean with distilled water and dry it for later use.

[0040] 2) Configure the electrolyte. The composition and process pa...

Embodiment 2

[0049] Embodiment two: the size of the test piece stainless steel plate 1Cr18Ni9Ti is 100mm * 10mm * 1mm, and the electrodeposition equipment processing method is used to prepare the copper deposition layer on the surface, and its operation steps are as follows:

[0050] 1) Surface treatment of stainless steel 1Cr18Ni9Ti, followed by polishing, degreasing, passivation, washing and drying.

[0051] 2) Configure the electrolyte. The composition and process parameters of the electrolyte in the present embodiment are respectively:

[0052] CuSO 4 ·5H 2 O 250g / L, 98% concentrated sulfuric acid 50g / L, electrolyte temperature 25°C. The electrolyte solution is prepared with analytical pure or chemical pure reagents plus distilled water.

[0053] 3) The particles mixed in the electrolyte are micron alumina particles with a particle size of 10 microns and a purity greater than 99.99%. Do particle pretreatment before processing.

[0054] 4) Electrodeposition parameters are selected...

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Abstract

The invention discloses a method for improving homogeneity in a jet electrodeposition processing process. The method includes the following steps that a substrate is subjected to surface pretreatment, polishing, surface cleaning, surface etching treatment, thorough cleaning with distilled water and drying up for standby; an electrolyte is prepared and pretreatment of micro particles is carried out, specifically, before electrodeposition, micron-grade aluminum oxide or silicon carbide particles are mixed with the electrolyte, the mixture is stirred for two hours and subjected to ultrasonic stirring for 30 minutes, so that the particles are fully wetted and evenly dispersed, and the addition amount of the micron-grade aluminum oxide particles is 10-30 g / L; numerical control programs are set; and during processing, an ultrasonic vibration bar is in contact with the electrolyte directly, and the electric field redistribution of the electrolyte on the surface of a negative pole is affected and changed through the micro particles. The growth process of crystal particles on the deposition layer is changed through the micro particles, and accordingly grain refinement is promoted. The micro particles achieve the vibration and friction effects during electrodeposition. By means of the method, the leveling performance of a deposition surface is improved to a certain extent.

Description

technical field [0001] The invention discloses a method for improving uniformity during spray electrodeposition processing, belonging to the technical field of advanced surface engineering. Background technique [0002] In the field of advanced surface engineering technology, electrodeposition technology is one of the most promising low-cost coating production methods. It has the advantages of simple process, convenient operation, and many types of coatings. It has great advantages in repairing thin-walled parts and parts with small damage Incomparable advantages of other technologies (such as surfacing, laser, spraying, etc.). However, due to some inherent deficiencies, further use is affected, and the dendrite caused by the edge effect is one of the prominent ones. [0003] The edge effect refers to the uneven distribution of the electric field during the electrodeposition of complex and irregular surfaces, and the concentrated electric field strength will appear at the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D5/08C25D5/22C25D3/38
CPCC25D3/38C25D5/08C25D5/20C25D5/22
Inventor 范晖赵阳培王善奎李想田宗军黄因慧邢邦圣马军
Owner XUZHOU NORMAL UNIVERSITY
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