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

A technology of rare earth oxides and chromizing, which is applied in coatings, metal material coating processes, solid-state diffusion coatings, etc., can solve problems such as the difficulty of adding rare earth oxides to chromizing coatings, and achieve improved oxidation resistance, Improvement of anti-oxidation performance and simple process
CN1594642AInactive Publication Date: 2005-03-16INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Publication Date
2005-03-16
Estimated Expiration
Not applicable · inactive patent

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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.
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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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