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Method for preparing titanium carbide coating through pulse electrodeposition

A technology of pulse electrodeposition and titanium carbide, applied in the direction of coating, electrolytic coating, etc., can solve the problems of reducing adhesion and achieve the effect of dense coating, simple operation and low cost

Active Publication Date: 2013-04-03
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical vapor deposition uses lower deposition temperatures than chemical vapor deposition, but it is this low temperature that causes delamination of the substrate and coating, reducing adhesion

Method used

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  • Method for preparing titanium carbide coating through pulse electrodeposition
  • Method for preparing titanium carbide coating through pulse electrodeposition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The method for preparing the titanium carbide coating by pulse electrodeposition in this embodiment is as follows:

[0027] The 304 stainless steel plate is cut into sheet samples by wire cutting, and is ground, cleaned and dried. Spot welding Fe-Cr wire to one end of the sample as the electrode lead. Electrodeposition adopts a three-electrode system, that is, the stainless steel plate sample is used as the cathode, the graphite electrode is used as the auxiliary electrode and carbon source (anode), and the nickel electrode is used as the reference electrode. . Take K 2 TiF 6 As the titanium source, the ternary eutectic (mixed salt) 40.25mol%NaCl-50.5mol%KCl--9.25mol%NaF salt is used as the active material K 2 TiF 6 Solvent, K 2 TiF 6 The content in the solvent is 7wt%. Put the mixed salt and titanium source prepared above into an alumina crucible, and raise the temperature to 900°C under the protection of argon gas. PAR2273 electrochemical workstation was used for const...

Embodiment 2

[0033] The method for preparing the titanium carbide coating by pulse electrodeposition in this embodiment is as follows:

[0034] The 304 stainless steel plate is cut into sheet samples by wire cutting, and is ground, cleaned and dried. Spot-welded Fe-Cr wire to one end of the sample as the electrode lead. Electrodeposition adopts a three-electrode system, that is, the stainless steel plate sample is used as the cathode, graphite is used as the auxiliary electrode and carbon source (anode), and the nickel electrode is used as the reference electrode. Take K 2 TiF 6 As the titanium source, the ternary eutectic (mixed salt) 40.25mol%NaCl-50.5mol%KCl--9.25mol%NaF salt is used as the active material K 2 TiF 6 Solvent, K 2 TiF 6 The content after the solvent is 5wt%. Put the mixed salt and titanium source prepared above into an alumina crucible, and raise the temperature to 850°C under the protection of argon gas. PAR2273 electrochemical workstation was used for constant potential p...

Embodiment 3

[0037] The method for preparing the titanium carbide coating by pulse electrodeposition in this embodiment is as follows:

[0038] The 304 stainless steel plate is cut into sheet samples by wire cutting, and is ground, cleaned and dried. Spot-welded Fe-Cr wire to one end of the sample as the electrode lead. Electrodeposition adopts a three-electrode system, that is, the stainless steel plate sample is the cathode, graphite is the auxiliary electrode and carbon source (anode), and the nickel electrode is the reference electrode. Take K 2 TiF 6 As the titanium source, the ternary eutectic (mixed salt) 40.25mol%NaCl-50.5mol%KCl--9.25mol%NaF salt is used as the active material K 2 TiF 6 Solvent, K 2 TiF 6 The content in the solvent is 10wt%. Put the mixed salt and titanium source prepared above into an alumina crucible, and the temperature is raised to 950°C under the protection of argon gas. PAR2273 electrochemical workstation was used for constant potential pulse deposition. The ...

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Abstract

The invention discloses a method for preparing a titanium carbide coating through pulse electrodeposition. The method comprises the following steps: through taking a substrate as a cathode, taking graphite as an anode and a carbon source and taking nickel as a reference electrode, melting a titanium source into a salt mixture; reacting for 0.5-2h under the protection of inert gas, at a temperature of 800-950 DEG C and under a pulse voltage of 2.5-3V, thus forming a titanium carbide coating on the substrate. According to the invention, deposition is performed by using a molten salt electro-deposition method without use of large equipment and precious materials, therefore, the method is low in cost and simple in operation; and in the reaction process, no harmful gas is required, and no harmful substance is produced, therefore, the method is environment-friendly; and a titanium carbide coating prepared by using the method disclosed by the invention is dense and good in performances.

Description

Technical field [0001] The invention belongs to the technical field of surface treatment, and particularly relates to a method for preparing a titanium carbide coating by pulse electrodeposition. Background technique [0002] Transition carbides are called refractory metal carbides because of their very high melting points. As one of the most important refractory metal carbides, titanium carbide has the advantages of high melting point (3067°C), high modulus (410-450GPa), high hardness (28-35GPa) and good chemical stability. Therefore, it is widely used in cutting tools and industrial wear-resistant parts. Titanium carbide has low chemical activity, so it is only corroded by concentrated acids and alkalis containing oxidants at room temperature, and still has good corrosion resistance at high temperatures. The most commonly used methods in the industry to prepare titanium carbide coatings are chemical vapor deposition, physical vapor deposition and thermal spraying. Physical v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/66C25D9/10C25D5/18
Inventor 吕旺燕刘世念苏伟
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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