Anti-wear and alkali-resistant ferrocene-zinc composite electroplating solution and application thereof

A composite electroplating and ferrocene technology, applied in the field of electrochemical plating, can solve the problems of poor anti-wear performance, inability to be widely used, restricting development and application, etc., and achieve the improvement and increase of anti-wear performance and alkali corrosion resistance Deposition current efficiency and good barrier effect

Active Publication Date: 2018-03-30
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the environment where many important steel components are often faced with severe wear and tear, such as ship propellers, mechanical gear buckles, etc., but metal zinc has good flexibility and poor wear resistance, which has always restricted its development and application.
In addition, zinc is an amphoteric metal, which is easy to react in alkaline environment to form zincate, so it has not been widely used in alkaline environment.

Method used

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  • Anti-wear and alkali-resistant ferrocene-zinc composite electroplating solution and application thereof
  • Anti-wear and alkali-resistant ferrocene-zinc composite electroplating solution and application thereof
  • Anti-wear and alkali-resistant ferrocene-zinc composite electroplating solution and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Ferrocene-zinc composite electroplating solution:

[0032] Plating solution system: 250g / L ZnSO 4 ·7H 2 O, 80g / L Na 2 SO 4 , 25g / L H 3 BO 3 , 40g / L Al 2 (SO 4 ) 3 18H 2 0, 10g / L ferrocene, prepare composite zinc sulfate bath SF for subsequent use.

[0033] Preparation of ferrocene-zinc composite electroplating layer

[0034] 1) Preparation of zinc sulfate plating solution system: 250g / L ZnSO 4 ·7H 2 O, 80g / L Na 2 SO 4 , 25g / L H 3 BO 3 , 40g / LAl 2 (SO 4 ) 3 18H 2 O, standby for blank sulfate bath SBlank;

[0035] Add 10g / L ferrocene to SBlank respectively to prepare composite zinc sulfate bath SF for future use.

[0036] 2) Using 20# standard carbon steel sheet as the base material, polish each surface of the test piece with 80#, 400#, 1000#, 2000# sandpaper water-phase sandpaper, put it in absolute ethanol and ultrasonically for 10 minutes to remove the oil on the surface, Then immerse the bare part of the test piece in 1mol / L HCl for 5s to activat...

Embodiment 2

[0046] Comparison of deposition current efficiency in ferrocene-zinc composite electroplating solution

[0047] Prepare the pure zinc electroplating layer and the ferrocene-zinc composite electroplating layer according to the steps in Example 1, and weigh the coating quality before and after deposition, and calculate the cathodic current efficiency during the deposition process according to formula (1).

[0048]

[0049] Among them, η c is the cathode current efficiency; m 1 is the mass of the sample before deposition, g; m 2 is the mass of the sample after deposition, g; e is the charge carried by electrons, C; j is the current density, mA cm -2 ; S is the deposition reaction area exposed to the plating solution, cm 2 ; t is the deposition time, s; M Zn is the molar mass of Zn, g / mol; N A is Avogadro's constant.

[0050] Such as Figure 4 Shown, in the range of all experimental conditions covered by the present invention, the recombination of ferrocene has effective...

Embodiment 3

[0052] Corrosion resistance of ferrocene-zinc composite electroplating coating

[0053] A 20# carbon steel circular plate with a diameter of 10 cm and a thickness of 1 cm was used as the substrate. After pretreatment, a pure zinc electroplating layer and a ferrocene-zinc composite electroplating layer were prepared according to the scheme of Example 1. Use an abrasion meter (USA Taber Company), rotate 500 revolutions under the condition of H-22 rubber grinding wheel load 500g, record the mass change before and after the test, and calculate the weight loss mass.

[0054] The results of the anti-abrasion test are as follows: Figure 5 As shown, under the same preparation conditions, the compounding of ferrocene reduces the abrasion weight loss of the coating by more than 50%. In addition, CB2 showed the highest anti-abrasion performance among pure zinc samples, indicating that its preparation conditions were stirring speed 600rpm, ultrasonic power 15W(t on = 1s,t off =1s) Aux...

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Abstract

The invention belongs to the field of electrochemical coatings, and particularly relates to an anti-wear and alkali-resistant ferrocene-zinc composite electroplating solution and an application thereof. The composite electroplating solution is 8-12g/L ferrocene which is added in a faintly acid zinc sulfate plating solution system. The ferrocene-zinc composite electroplating solution is compact insurface, good in wear resistance and corrosion resistance, and especially suitable for easy-to-wear alkali environment, and has a good application value in the field of steel structure protection in an industrial alkaline environment and the like.

Description

technical field [0001] The invention belongs to the field of electrochemical plating, and in particular relates to an anti-wear and alkali-resistant ferrocene-zinc composite electroplating solution and an application thereof. Background technique [0002] Electrochemical plating is the use of metal electrodeposition to form a uniform, dense, and well-bonded metal or alloy deposition layer on the surface of the workpiece. Among many protective metal coatings for steel, zinc coating has negative self-corrosion potential, dense crystal structure and good barrier effect, and has been widely used in steel protection. However, the environment where many important steel components are often faced with severe wear and tear, such as ship propellers, mechanical gear buckles, etc., but metal zinc has good flexibility and poor wear resistance, which has always restricted its development and application. In addition, zinc is an amphoteric metal, which is easy to react in alkaline enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56
CPCC25D3/565
Inventor 李科翟晓凡管方王楠段继周
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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