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Remove Carbon Deposits from The Combustion Chamber of Diesel Generators

Dec. 25, 2023

Some parts of the diesel generator (such as the bottom of the cylinder head) have a strong layer of carbon deposits adhered to the surface of the parts after a period of use. Due to the poor thermal conductivity of carbon deposits, a large amount of carbon deposits accumulate on the surface of the parts, which will cause local overheating of the parts, resulting in a decrease in their stiffness and strength. In severe cases, it can also cause serious faults such as nozzle sintering, valve erosion, piston ring jamming, and cylinder pulling. In addition, the large accumulation of carbon deposits can also pollute the lubrication system, block oil circuits and filters, and shorten the service life of diesel generators. Therefore, it must be removed during repair.

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1. Mechanical method. Mechanical method is a method of removing carbon deposits by using wire brushes, scrapers, bamboo sheets, or sandcloth polishing. It can be made into specialized brushes and scrapers according to the shape of the parts to be cleaned. The mechanical method for removing carbon deposits has low efficiency and poor removal quality. Some parts are difficult to clean and may leave many small scratches, which become growth points for new carbon deposits and damage the roughness of the parts. Therefore, high-precision parts should not use this method to remove carbon deposits.

2. Spray nucleation method. The nuclear spraying method is a method of using high-speed airflow to spray the crushed walnut, peach, and apricot shell particles onto the surface of the parts to remove carbon deposits. This method has high efficiency and is clean and thorough in removing carbon deposits, but it requires specialized equipment to form a high-speed airflow, which is relatively expensive and therefore has limited usage conditions.

3. Chemical method. Chemical method is the use of a chemical solvent (decarbonization agent) to soften the carbon deposits on the surface of a part, causing it to lose its ability to bind with metals, and then remove the softened carbon deposits. The advantages of this method are high efficiency, good carbon removal effect, and less likely to damage the surface of the parts. There are two main types of decarburizers: inorganic decarburizers and organic decarburizers.

(1) Inorganic decarbonization agent: It is prepared by mixing inorganic drugs with water and needs to be heated for use. It is used for steel and aluminum parts according to different formulas. When using inorganic decarbonizing agents, heat the solution to 80-90 ℃, soak the parts in the solution for 2 hours, wait for the carbon deposits to soften, remove them, use a brush to remove the carbon deposits, then rinse with hot water containing potassium dichromate with a mass fraction of 0.1%~0.3%, and finally dry with a soft cloth to prevent rusting.

(2) Organic decarburization agent: a decarburization flux prepared from organic solvents, with strong decarburization ability and no corrosive effect on metals. It can be used at room temperature and is mainly used to remove carbon deposits from precision parts.

As a professional diesel generator manufacturer, we always insist on using first-class talents to build a first-class enterprise, create first-class products, create first-class services, and strive to build a first-class domestic enterprise. If you would like to get more information welcome to contact us via sales@dieselgeneratortech.com.

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