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Understanding the Molybdenum Disulfide Coating Process

Molybdenum disulfide is a solid film lubricant, which can be used in the manufacturing of different types of industrial products.

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Understanding the Molybdenum Disulfide Coating Process

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  1. Understanding the Molybdenum Disulfide Coating Process

  2. Molybdenum disulfide is a solid film lubricant, which can be used in the manufacturing of different types of industrial products. These include gear oils, pastes, paint like coatings and other grease based lubricants. Also known as MoS2, the lubricant can perform in applications with wide temperature ranges and pressures, while maintaining its basic structure. For these reasons, MoS2 is often designed and used as a protective coating for metal substrates. In this post, we provide information regarding the various molybdenum disulfide coating processes.

  3. Types of MoS2 Coating Methods Molybdenum disulfide is known for its strength and lubricity. MoS2 has a layer-lattice structure that bonds easily to metal substrates. This allows an applicator to apply the coating in different ways. Essentially, four methods can be used to apply MoS2 onto a substrate. The steps of each process are described in the points below, for the best results we recommend using a professional applicator. Burnishing/Rubbing Physical Vapor Deposition (PVD)

  4. Burnishing/Rubbing:In this method, molybdenum is used in powder form to help produce a lubricating film on the substrate. Generally, the powder is rubbed onto the metal using a soft fabric pad. However, a specialized coating applicator can also be used. Place protective sheets on and around the work area to prevent the powder from spreading. The substrate must be clean and free of rust and loose debris. A light (400-800 grit) aluminium oxide or similar grit blast is recommended. Place the metal substrate onto the sheets, and spread the powder across its surface Place the application pad on the powder. Apply a little bit of pressure, and spread the powder across the substrate surface. Keep the movement uniform, using smooth circular motions. Continue doing this till the powder has coated the surface completely.

  5. Physical Vapor Deposition (PVD): This method is not a method we utilize at Micro surface Corporation. If you require this method of application, we recommend finding a company with experience in PVD surface treatments. This molybdenum disulfide coating process requires a combination of a rotary diffusion pump, bell jar, spatula, and sample holder. Remove the bell jar cover. Use the spatula to scoop up the MoS2 paste, and put it into the sample holder. Then replace the bell jar cover. Place the substrate in the vacuum environment. Define the paste’s evaporation temperature, and stabilization time using a computer. Use the rotary pump to lower the pressure and create a vacuum. The lack of pressure will cause the temperature to rise, slowly converting the paste into vapor. The vapor will then form an even coating on the substrate surface.

  6. Additional MoS2 Coating Methods Impingement Coating Method (AMS2526): MoS2 can be applied as a fine powder to a coating thickness of less than 0.0001” utilizing this method. This method requires specialized equipment to obtain the desired results. Please contact us at info@ws2coating.com for more information on this coating method and how it can benefit your application. This method generally does not affect machine tolerances and can provide long term lubrication in extreme environments. It can be used as a primary lubricant or can be used in conjunction with oil and/or grease to extend equipment life, prevent galling, seizure and fretting.

  7. MoS2 As A Paint-like Coating (MIL-PRF-46010, AS5272 and more): MoS2 is often used as an additive with certain types of resins and binders to form a paint-like coating. Depending on the substrate and coating material, the required curing process will either be Air or Heat cured. Typical thickness of this coating is 0.0002 – 0.0007” The coating process, from surface preparation and application to curing will vary from the type of coating required and the manufacturer Obtain the manufacturers application instructions prior to starting your project. Need help determining which coating will work best for your application? Contact us at www.ws2coating.com or info@ws2coating.com for assistance. We will be happy to do the application for you!

  8. In the meantime, if you have requirements for MoS2 coating please contact us. AMS2526, MIL-PRF-46010 and AS5272 are some of the specifications we apply the coating to. A user can choose the relevant molybdenum disulfide coating process, depending on the industry and application. The use of the lubricant can help create durable components, which can enhance the strength and performance of various machines. Micro Surface Corporation 270 Hillsdale Avenue San Jose, CA 95136 Phone: +1 408 723 0700 Fax: 408.723.0710 E-mail: info@ws2coating.com https://www.ws2coating.com/

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