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A method for accurately controlling the thickness of an electroless plating layer and a method for preparing a wear-resistant screen

A technology of electroless plating and precise control, applied in the field of electroless plating, can solve the problem that the electroless plating process cannot precisely control the thickness of the coating, and achieve the effect of accurately controlling the thickness of the coating, improving the manufacturing precision and improving the precision of the coating.

Inactive Publication Date: 2020-03-31
HENAN INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for accurately controlling the thickness of the electroless plating coating, thereby solving the problem that the existing electroless plating process cannot accurately control the thickness of the coating

Method used

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  • A method for accurately controlling the thickness of an electroless plating layer and a method for preparing a wear-resistant screen
  • A method for accurately controlling the thickness of an electroless plating layer and a method for preparing a wear-resistant screen
  • A method for accurately controlling the thickness of an electroless plating layer and a method for preparing a wear-resistant screen

Examples

Experimental program
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Effect test

Embodiment 1

[0053] The preparation method of the wear-resistant screen of this embodiment is aimed at a 500-mesh 316L stainless steel screen with a length of 1050mm and a width of 1020mm, and the design coating thickness is 0.0020mm. The following steps are specifically used for preparation:

[0054] 1) Use lye to chemically degrease the screen for 5 minutes, ultrasonically clean it for 1 minute, and then rinse it with water for 0.5 minutes;

[0055] 2) Use acid solution to pickle and activate for 1 min, rinse with clean water for 0.5 min, and then wash with pure water for 0.5 min; the components of the acid solution used for pickling and activation are: 25% hydrochloric acid, 15% nitric acid, 10% sulfuric acid, hydrofluoric acid 5% acid, the balance is water, and finally sodium lauryl sulfate is added at 0.01g / L, and sodium phosphate is added at 50g / L;

[0056] 3) The screen after pickling is placed in the electroplating tank, the electroplating solution is Ni-P plating solution, and the...

Embodiment 2

[0077]The preparation method of the wear-resistant screen in this embodiment is aimed at a 200-mesh 304 stainless steel screen with a length of 1050 mm and a width of 1050 mm. Design coating thickness is 0.0030mm, adopts the method identical with embodiment 1, difference only is: in step 2), mixed acid component is by volume ratio: hydrochloric acid 25%, nitric acid 12%, sulfuric acid 12%, hydrofluoric acid 8 %, the balance is water, and finally sodium lauryl sulfate is added at 0.03g / L, and sodium phosphate is added at 40g / L. In step 3), the electroplating induced condition is at 300μA / dm 2 Electroplating at high current for 0.7min.

[0078] Step 4) in, the composition of Ni-P plating solution is: NiSO 4 ·6H 2 O 30g / L, NaH 2 PO 2 ·H 2 O 28g / L, lactic acid 12g / L, sodium citrate (Na 3 C 6 h 5 o 7 2H 2 O) 37g / L, anhydrous sodium acetate (CH 3 COONa) 36g / L, commercially available FST-2 type brightener 3.5mL / L, solvent is water, corresponding k 1 、k 2 、k 3 、k 4 The...

Embodiment 3

[0082] The preparation method of the wear-resistant screen of the present embodiment, for the 635 order 316L stainless steel screen, the design coating thickness is 0.0020mm, adopts the same method as in Example 1, the only difference is: in step 2), the components of the mixed acid solution are as follows: The volume ratio is: hydrochloric acid 20%, nitric acid 13%, sulfuric acid 12%, hydrofluoric acid 8%, the balance is water, and finally add sodium lauryl sulfate at 0.02g / L, and add sodium phosphate at 60g / L . In step 3), the electroplating induced condition is at 500μA / dm 2 Electroplating at high current for 0.7min. In step 5), the aging treatment condition is to keep warm at 400° C. for 60 minutes.

[0083] In this embodiment, the actual coating thickness detected is 0.0018mm, and the error is -0.0002mm.

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Abstract

The invention relates to a method for precisely controlling the thickness of an electroless plating layer and a preparation method for a wear-resistant screen, belonging to the field of electroless plating. The method for accurately controlling the thickness of the electroless plating layer of the present invention accurately measures and calculates the plating speed and controls the plating time by establishing a mathematical model and performing iterative calculation on parameters such as the concentration of reactants in the plating process. The method realizes the use of computer programs to control the electroless plating process, establishes the mathematical model of the plating speed and the remaining time of plating by detecting the reactant concentration, pH value, temperature and other parameters that affect the chemical plating process, and uses the iterative calculation principle to accurately calculate the plating Speed, precise control of plating time, so as to achieve the purpose of precise control of coating thickness. The method can control the thickness error of the electroless plating layer within the range of ±0.0002mm, and significantly improves the manufacturing precision of the electroless plating product.

Description

technical field [0001] The invention belongs to the field of electroless plating, and in particular relates to a method for precisely controlling the thickness of an electroless plating layer and a preparation method for a wear-resistant screen. Background technique [0002] High-mesh (≧200 mesh) stainless steel screen is mainly used in the screening and classification of powder. In the screening process of hard wear-resistant materials (such as silicon carbide powder, alumina powder, diamond powder, etc.), because the wire diameter of the screen is too thin (such as the standard wire diameter of the 200 mesh to 635 mesh screen is generally only 0.056mm~0.020mm), it is very easy to wear and damage the screen. When the wear and damage of the screen reaches a certain level, it will seriously affect the accuracy and effect of the screening. At present, the service life of high-mesh stainless steel screens is generally short, which also leads to high screening costs for related...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/36
CPCC23C18/1675C23C18/36
Inventor 刘贯军牛毅张亚奇吴婷婷付成果冯宜鹏胡楠李海波马利杰刘启航
Owner HENAN INST OF SCI & TECH
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