Method for preparing nano platinum oxidation coating for high temperature alloy

A high-temperature alloy and nano-platinum technology, which is applied in the direction of metal material coating technology, coating, solid-state diffusion coating, etc., can solve the problems that there are no reports on the preparation technology of nano-platinum-aluminum coating, and achieve a simple and convenient preparation method. Effect of improving binding force and improving uniformity

Inactive Publication Date: 2009-02-04
KUNMING INST OF PRECIOUS METALS
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Problems solved by technology

[0004] After retrieving a large amount of literature, there has been no report on the preparation technology of nano-platinum-aluminum coating

Method used

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  • Method for preparing nano platinum oxidation coating for high temperature alloy
  • Method for preparing nano platinum oxidation coating for high temperature alloy

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Embodiment 1

[0016] The superalloy is first surface treated, put into hydrochloric acid with a concentration of 1-10M, take it out after about 1-5min, wash it in twice distilled water and dry it. Place the treated high-temperature alloy in a platinum electroplating solution for electroplating. The platinum electroplating solution is composed of 5-40g / L chloroplatinic acid, 50-600g / L hydrochloric acid and an appropriate amount of additives (0.5-5g / L). The temperature is 50-100°C, and the pH value is 2.5-5.8. Subsequently, the obtained sample is subjected to powder embedding aluminizing treatment. The infiltrating agent is composed of aluminum powder, alumina powder and ammonium chloride. The composition of the aluminizing agent is 1-12% aluminum by weight percentage, 75-84% Aluminum oxide powder and 4-24% ammonium chloride are mixed evenly. Embed the sample in a container filled with infiltration agent, then place the aluminized container in a high-temperature resistance furnace, pass in a...

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Abstract

The invention discloses a preparation method of nano Pt-Al coating, which comprises the following steps: first, a high-temperature alloy matrix receives surface treatment; second, a layer of about 0.5 micrometer to 10 micrometer thick pure platinum is plated on the cleaned alloy surface; finally, powder embedding aluminizing is conducted under a certain temperature, to obtain the nano Pt-Al coating. The surface of the coating is compact, can be highly adhered to the matrix, can be widely applied to all high-temperature alloys, in particular the nickel-based high-temperature alloy, can effectively improve the service life of the high-temperature alloys, so that the alloys have excellent cold and hot impact resistant capability as well as oxidation resistant capability at high temperature.

Description

technical field [0001] The invention provides a method for preparing a nano-scale high-temperature anti-oxidation coating, in particular, a method for preparing a nano-platinum-aluminum coating for a high-temperature alloy, and belongs to the field of surface technology. Background technique [0002] In the fields of modern energy industry and aerospace industry, superalloys are an indispensable and important part. Today, superalloys have been widely used in various gas turbines and various spacecraft, rocket engines, nuclear reactors, submarines, thermal power plants, petrochemical equipment, etc. In order to ensure that these components have a certain service life during use, they must meet sufficient mechanical strength and good high-temperature oxidation resistance and hot corrosion resistance. However, superalloys usually cannot meet all the above performance requirements at the same time. Therefore, a layer of high-temperature coating is usually prepared on its surfac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F17/00C25D3/50C23C10/48C23G1/02
Inventor 闻明管伟明姜东慧陈志全李艳琼李旸张俊敏
Owner KUNMING INST OF PRECIOUS METALS
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