Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for forming anti-corrosion and anti-oxidation coating layer on high-temperature components of gas turbine fuel additive

A technology for gas turbines and high-temperature components, which is applied in gas turbine devices, gaseous chemical plating, engine components, etc., can solve the problems of short service life and shortened maintenance cycle of gas turbines, and achieve the effect of convenient process

Inactive Publication Date: 2008-05-07
KOREA ELECTRIC POWER CORP
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-temperature components of gas turbines operating under such harsh conditions have a very short life span of 3 to 4 years. For example, when they are used as terminal loads instead of bases in Korea, their lifespans are even shorter, and the maintenance cycle of gas turbines is shortened.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for forming anti-corrosion and anti-oxidation coating layer on high-temperature components of gas turbine fuel additive
  • Method for forming anti-corrosion and anti-oxidation coating layer on high-temperature components of gas turbine fuel additive
  • Method for forming anti-corrosion and anti-oxidation coating layer on high-temperature components of gas turbine fuel additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 (combustion test for forming coating)

[0034] In this embodiment, as the gas turbine is used a super small gas turbine installed in a model airplane shown in Figs. 1A and 1B, which has a static thrust of 13 kgf at 135,000 rpm. Inside the gas turbine there is a combustion chamber as shown in FIG. 2A . As shown in FIG. 2B , it is a structure in which the air compressor (suction) machine and the integrated turbine are connected on the same shaft through the combustion chamber. In the working state of the gas turbine, butane gas is used as fuel, and the silicon organic compound TEOS is applied by spraying from the front of the air intake machine, and flows into the combustion chamber together with the air. After the gas turbine is started, it works stably at 25,000rpm. The sprayed TEOS burns together with the air, and the organic matter containing C is oxidized and converted into CO, CO 2 and H 2 O and other forms are discharged, and the Si component in TEOS...

Embodiment 2

[0035] Example 2 (Electron Microscopy Analysis of Coatings)

[0036]Fig. 5 is a photograph of a turbine blade with a coating formed according to Example 1. It can be seen that a uniform coating is formed on the integrally formed airfoil, which was cut as shown in Fig. 5 for cross-sectional analysis. Using a scanning electron microscope (Scanning Electron Microscopy: SEM) of JEOL Ltd., the coating on the surface and cross-section were respectively analyzed. 6 is a cross-sectional SEM photograph ( FIG. 6A ), a silicon composition diagram ( FIG. 6B ) and an oxygen composition diagram ( FIG. 6C ) of a coating formed on a turbine blade. As shown in FIG. 6A , it can be seen that the coating consists of a solid layer of about 2 to 3 μm thick formed on the nickel-based alloy base material and a porous coating of 10 μm or more formed thereon. It can be seen from the composition diagrams of FIGS. 6B and 6C that the cladding layer is silicon oxide. The porous coating does not peel off ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
boiling pointaaaaaaaaaa
Login to View More

Abstract

In a method for effectively depositing an anti-corrosion and anti-oxidation material, such as silicon dioxide, on high-temperature components of a gas turbine, including blades rotating at a high speed during the operation of the gas turbine, an organic compound including a metal ingredient, such as silicon, is added to a fuel for the gas turbine, such as LNG, diesel or kerosene, or the organic compound is sprayed into combustion air so that the organic compound can burn together with the fuel, in order to improve the durability of the high-temperature components. Silicon dioxide, produced by burning a silicon organic compound together with the fuel, is uniformly deposited on all the high-temperature components of the gas turbine, which are exposed to the combustion gas of a high temperature, thus forming an anti-corrosion and anti-oxidation coating layer of a thickness of several to several tens of mum on the high-temperature components during the operation of the gas turbine.

Description

technical field [0001] The present invention relates to a method for effectively vapor-depositing anti-corrosion and anti-oxidation substances such as silicon on high-temperature components including high-speed rotating gas turbine blades during gas turbine operation. Oxide coatings are formed on components to improve the corrosion resistance and oxidation resistance of these high-temperature components. For this purpose, organic compounds containing semi-metal components such as silicon are added to fuels such as LNG (liquefied natural gas), gasoline, or kerosene, or organic compounds containing Organic compounds of semi-metallic composition such as silicon are otherwise sprayed into the combustion air and co-combusted with the fuel. Background technique [0002] The turbine part of the gas turbine used in combined cycle power generation works in a high temperature environment above 1000°C, so due to the oxidation of the surface of the parts, the aging is very serious, and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/40C23C16/44F02C7/22F01D5/28
CPCC10L10/04Y02E20/16C10L3/003C10L1/28C10L1/285Y02T50/67C23C26/00F01D5/288F02C7/30F02C7/22F02C3/20Y02T50/60
Inventor 金珉泰张盛庸元钟凡
Owner KOREA ELECTRIC POWER CORP