Preventive measures for corrosion of snap ring without ear

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Snap ring without ear what if there is corrosion? How to take preventive measures against the corrosion of the earless snap ring? Now let’s have a look! Earless snap rings are often corroded by surrounding media in the process of manufacturing, storage and use. Since the earless circlip works by elastic force, and the elastic force will change and lose its function after it is corroded, preventing the corrosion of the earless circlip can ensure the working stability of the earless circlip and prolong its service life.

1. Phosphating + oiling / waxing of snap rings without ears

The method of putting the earless circlip into a phosphate solution containing manganese, iron and zinc to form a water-insoluble phosphate film on the metal surface is called phosphating.

Zinc phosphating and oiling are the standard anti-corrosion coating methods for ear less circlips in din2093 standard and factory standard. In the phosphating process, fine-grained phosphate precipitates on the base metal to form a protective film. If further combined with oiling or waxing coating, cocoa can make the ear free circlip obtain more durable anti-corrosion effect. This anti-corrosion method is usually used indoors or outdoors with rain proof measures.

Meng phosphating coating has no anti-corrosion effect, but is only used as a lubricating layer. Certain anti-corrosion effect can be obtained by oiling manganese phosphated earless circlips, which is only suitable for the transportation and storage of earless circlips.

2. Oxidation treatment of earless snap ring

The oxidation treatment of steel is also known as bluing, blackening and blackening. After oxidation treatment, protective magnetic iron oxide is generated on the surface of the earless snap ring. This oxide film is generally blue or black, and sometimes black brown. Its color depends on the surface state of the earless snap ring, the chemical composition of the earless snap ring material and the oxidation treatment process. Although the oxide film can improve the corrosion resistance of the earless circlip, because of its thin film and pores, its protection ability is poor, and it can only be used for the earless circlip working in the medium with low corrosivity.

Oxidation treatment has the advantages of low cost, simple process formula, high production efficiency, and certain elasticity of the oxide film, which basically does not affect the characteristic curve of the ear free circlip. Therefore, oxidation treatment is widely used as anti-corrosion and decorative measures for forming spiral ear free circlip, ear free circlip washer, and piece ear free circlip.

3. Electroplating of snap ring without ear

When the metal coating is separated from the solution, hydrogen will diffuse on the surface of the earless circlip. This situation is more common when high-strength ear less circlip steel is used as the raw material of ear less circlip. The earless circlip after electroplating must be dehydrogenated in time. The tendency of hydrogen embrittlement can be reduced by appropriate heat treatment (diffusion annealing) after electroplating, but it can not be completely eliminated. Due to the influence of hydrogen embrittlement, the surface anti-corrosion coating of ear less circlip should not be applied by electroplating as far as possible. The above is a summary of the corrosion prevention measures for the ear less circlip.

For more information about earless circlips, please visit the official website:

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