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Chromizing coating modified by rare earth oxide and preparation method and application thereof

A rare earth oxide and chromizing technology, which is applied in the field of coating preparation, can solve the problems such as the difficulty of adding rare earth oxides into the chromizing coating, and achieve the effects of improving oxidation resistance, enhancing adhesion, and reducing growth speed

Inactive Publication Date: 2007-01-24
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Though chromizing coating is a kind of common high-temperature protective coating in the prior art, yet add rare earth oxide therein to further improve the Cr of its thermal growth. 2 o 3 The research on the film is rarely reported, mainly because it is difficult to dope a certain amount of rare earth oxide in the chromized coating.

Method used

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  • Chromizing coating modified by rare earth oxide and preparation method and application thereof
  • Chromizing coating modified by rare earth oxide and preparation method and application thereof
  • Chromizing coating modified by rare earth oxide and preparation method and application thereof

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Embodiment

[0044] In this embodiment, the first Ni-CeO on the low carbon steel 2 and Ni-Y 2 o 3 Preparation of CeO by Composite Electroplating and Diffusion Chromizing 2 and Y 2 o 3 Modified chromized coating as an example:

[0045] The composition of the chromized coating modified by rare earth oxides: the chromium content of the surface layer is 35-55 parts, and its composition is in a gradually decreasing distribution state from the surface to the inside. Oxide CeO 2 or Y 2 o 3 It is 1-4 parts, and the balance is M (Ni in Ni, Fe or Co), which comes from the composite coating;

[0046] The preparation method is as follows: the M-rare earth oxide composite coating is prepared by conventional composite electroplating technology. M is Ni, Fe or Co, and generally selects the same element as the main component of the matrix material. The matrix material is Fe, Ni, Co, carbon steel, alloy steel with poor oxidation resistance, commonly used sulfate system (MSO 4 ) plating solution....

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Abstract

The invention discloses a rare-earth oxide modified chromizing coating and its preparation method and uses. Modified chromizing coating constituent is made up of infiltrated chrome, composite deposit metal M and minim rare-earth oxide rare-earth oxide Re#-[x]O#-[y]is Re=Ce, Y, La etc. According to mass percent, chrome content of chromizing coating surface layer is 35-55 portion, and others are M and minim rare-earth oxide, in which M coming from M-Re#-[x]O#-[y] composite deposit. The process is as follows: using metal Ni, Fe , Co, carbon steel or low-alloy steel as base material, making M-Re#-[x]O#-[y] composite deposit on base material using composite electric plating method, diffusing for chromizing, getting rare-earth oxide modified chromizing coating. The invention has a simple and mature process. and coating can physically grow protective compact Cr#-[2]O#-[3]oxidation film under high temperature, which is intensively adhesive to coating base body. Coating have good oxidation and corrosion resistance.

Description

technical field [0001] The invention relates to coating preparation technology, in particular to a chromized coating modified by rare earth oxides, a preparation method and application. Background technique [0002] It has been reported for a long time to prepare oxidation-resistant chromizing coating by solid powder chromizing method. Its basic principle is to embed the workpiece in the prepared infiltrant, hold it for a certain period of time in an argon atmosphere and at a certain temperature, and make chromium penetrate into the surface of the workpiece through reaction. Due to the high temperature oxidative corrosion environment, the thermally grown Cr 2 o 3 It has protective properties, so chromium coatings are usually developed on iron-based, nickel-based and other metals in order to form Cr during high temperature oxidation 2 o 3 protective oxide film. Rare earth oxides enhance thermally grown Cr 2 o 3 The performance of the film has been reported, which is ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C10/38
Inventor 彭晓朱利敏王福会
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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