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Coating for GH907 products under ocean environment and preparation and use methods thereof

A technology of GH907 and marine environment, which is applied in the field of surface treatment of GH907 material parts, can solve the problems of GH907 material parts failure, poor corrosion resistance, and reduce the service life of GH907 material parts, so as to achieve low production cost and good anti-corrosion effect , the effect of convenient operation

Active Publication Date: 2010-05-19
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] GH907 material (see the table for the content of the main components of the material) is mainly used on shipboard engines where the working temperature is (560-650) °C, such as the front half assembly of the low-voltage guide inner ring and the rear casing shell assembly. Cr is low, only about 1% (generally Cr content higher than 13% can have good corrosion resistance), and its corrosion resistance is poor, especially in marine environment conditions, high temperature and humidity, high concentration of salt spray atmosphere and The marine environment prone to mildew will cause very serious corrosion, which will not only greatly reduce the service life of GH907 material parts, but even lead to early failure of GH907 material parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Coatings for GH907 material parts in the marine environment, in terms of mass ratio, the ratio of raw materials used to prepare the coating is:

[0038] High temperature resistant multi-component powder 30%

[0039] Alumina powder (Al 2 o 3 ) 12%

[0040] Nano titanium dioxide (TiO 2 ) 3%

[0041] Mica powder 3%

[0042] Metal zinc powder 2%

[0043] Potassium silicate balance

[0044] Among them, the high temperature resistant multi-component powder is composed of:

[0045] Nickel chromium aluminum yttrium (NiCrAlY) powder 48%

[0046]Magnesium Oxide (MgO) 10%

[0047] Chromium oxide (Cr 2 o 3 ) 38%

[0048] Calcium oxide (CaO) balance

[0049] The nickel-chromium-aluminum-yttrium NiCrAlY powder is composed of 22.0% Cr, 11.0% Al, 1.0% Y, and Ni as the rest.

[0050] The above requirements nano TiO 2 The particle size of powder is ≤50nm, and the particle size of other raw materials is ≤5μm.

[0051] The mechanical dispersion method of the circulating bal...

Embodiment 2

[0065] Coatings for GH907 material parts in the marine environment, in terms of mass ratio, the ratio of raw materials used to prepare the coating is:

[0066] High temperature resistant multi-component powder 40%

[0067] Alumina powder (Al 2 o 3 ) 15%

[0068] Nano titanium dioxide (TiO 2 ) 5%

[0069] Mica powder 5%

[0070] Metal Zinc Powder 3%

[0071] Potassium silicate balance

[0072] Among them, the high temperature resistant multi-component powder is composed of:

[0073] Nickel chromium aluminum yttrium (NiCrAlY) powder 60%

[0074] Magnesium Oxide (MgO) 5%

[0075] Chromium oxide (Cr 2 o 3 ) 30%

[0076] Calcium oxide (CaO) balance

[0077] The nickel-chromium-aluminum-yttrium (NiCrAlY) powder is composed by mass percent: Cr: 23.0%, Al: 6.0%, Y: 0.5%, Ni: the balance.

[0078] The above requirements nano TiO 2 The particle size of powder is ≤50nm, and the particle size of other raw materials is ≤5μm.

[0079] The mechanical dispersion method of the ...

Embodiment 3

[0093] Coatings for GH907 material parts in the marine environment, in terms of mass ratio, the ratio of raw materials used to prepare the coating is:

[0094] High temperature resistant multi-component powder 20%

[0095] Alumina powder (Al 2 o 3 ) 8%

[0096] Nano titanium dioxide (TiO 2 ) 1%

[0097] Mica powder 1%

[0098] Metal zinc powder 1%

[0099] Potassium silicate balance

[0100] Among them, the high temperature resistant multi-component powder is composed of:

[0101] Nickel chromium aluminum yttrium (NiCrAlY) powder 40%

[0102] Magnesium Oxide (MgO) 13%

[0103] Chromium oxide (Cr 2 o 3 ) 46%

[0104] Calcium oxide (CaO) balance

[0105] The nickel-chromium-aluminum-yttrium (NiCrAlY) powder is composed by mass percent: Cr: 23.0%, Al: 12.0%, Y: 0.8%, Ni: the balance.

[0106] The above requirements nano TiO 2 The particle size of powder is ≤50nm, and the particle size of other raw materials is ≤5μm.

[0107] The mechanical dispersion meth...

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Abstract

The invention relates to a coating for GH907 products under ocean environment and preparation and use methods thereof. The coating comprises the following raw materials in mass ratio: 20-40 percent of high-temperature resisting multi-component pulverulent body, 8-15 percent of alumina powder, 1-5 percent of nanometer titanium dioxide, 1-5 percent of mica powder, 1-3 percent of zinc powder and the balance of potassium silicate, wherein the high-temperature resisting multi-component pulverulent body comprises Ni-Cr-Al-Y powder, magnesia, chromic oxide and calcium oxide. The raw materials are mixed by adopting a mechanical dispersion way of a circulation ball mill. When the coating is in use, the viscosity of the coating is adjusted by distilled water, and the coating is sprayed in an airing chamber by using a spray gun through adopting a spraying method. An inorganic salt is used as a film former and nanometer metal oxide catalysts, refractory oxide and metal powder are added, therefore, the prepared coating has erosion resistance at normal temperature but also high temperature oxidation resistance and plays the roles of preventing wetness and heat, mould and salt mist.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, in particular to the surface treatment technology of GH907 material parts on shipboard aircraft engines. Background technique [0002] GH907 material (see the table for the main components of the material) is mainly used in the parts of the shipboard engine where the working temperature is (560-650) ℃, such as the front half assembly of the low-voltage guide inner ring and the rear casing shell assembly. Cr is low, only about 1% (generally, Cr content higher than 13% can have good corrosion resistance), and its corrosion resistance is poor, especially in marine environmental conditions, high temperature and humidity, high concentration of salt spray atmosphere and The marine environment that is prone to mildew will cause very serious corrosion, which will not only greatly reduce the service life of GH907 material parts, but even lead to premature failure of GH907 material parts. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/02C09D5/18C09D5/10B05D7/14
Inventor 孙慧艳段序军张春刚薛庆增孙士江程世远赵永岗梁岩周英杰孙杰王东军徐琪王成
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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