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Phosphate coating is the crystalline coating applied on the ferrous metals to inhibit corrosion. The phosphate coating lends a gray to black appearance of the surface. In many applications phosphate coating is followed by oil coating (P & O) to improve its rusting and anti-galling properties. In this post, we will introduce you to different types of phosphate coating, their industrial applications, and benefits.

Phosphate coating is the crystalline coating applied on the ferrous metals to inhibit corrosion. The phosphate coating lends a gray to black appearance of the surface. In many applications phosphate coating is followed by oil coating (P & O) to improve its rusting and anti-galling properties. In this post, we will introduce you to different types of phosphate coating, their industrial applications, and benefits.

Types of Phosphate Coating

Phosphate coating is segregated under two types. Below are they:

Manganese Phosphate Coating – Type M:

The manganese phosphate coatings are available in black and dark gray color. They are used as corrosion protection agents, anti-galling agents, and as a lubricant. These coatings have the highest hardness and superior corrosion resistances among all general phosphate coatings. The treatment time often varies from five to fifteen minutes. Some of its features and applications are:

  • These coatings are applied by immersion to bearings, bushings, fasteners and other common industrial products.
  • The coatings are used for sliding products like transmission systems, motor vehicle components in brake and clutch assemblies, engine components, leaf or coil springs

Zinc Phosphate Coatings – Type Z:

Zinc phosphate coating is mainly used as rust proofing. These coatings are usually applied by spraying or immersion. The zinc phosphate coatings are available in black and dark gray colors, and lighter in comparison to manganese phosphate coatings.

Industries using Phosphate Coatings

Phosphate coatings are utilized in various industries. Below are some of the industries served.

  • Hydraulic system manufacturers
  • Cold-forming industries
  • Heavy equipment manufacturers
  • Gear & bearing manufacturers
  • Electrical connector manufacturers
  • Military armament suppliers
  • Nuclear component fabricators

Advantages of Phosphate Coating

The following are a few advantages of using phosphate coatings

  • Phosphate coating provides strong adhesion and corrosion protection, and also improves the friction properties of sliding components.
  • Some of the threaded parts are treated with phosphate coatings, which improves their anti-galling and rust inhibiting characteristics.
  • Zinc phosphate coatings are used as Chemical Agent Resistant Coating (CARC) paints on military equipment including munitions, aviation, and ground. This helps them withstand harsh environment conditions.

All the above-given information validates why phosphate coating is gaining popularity across various industries. Along with selecting the coating for your industrial application, it is very important that you procure them from a well-known manufacturer. Microsurface Corporation in San Jose, California is one of the leading and well-known applicators of engineered lubricants, coatings, and manufacturer of Timesaver Lapping Compounds.

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The US Department of Homeland Security has deemed certain types of businesses as “essential” businesses. Microsurface Corporation is one of the businesses deemed as “essential” based on supporting customers in “Critical Infrastructure Sectors” as determined by the federal government. These sectors include: Critical Manufacturing; Government Facilities; Nuclear Reactors, Materials, and Waste; Defense Industrial Base; and Communications.

We are committed to the safety and health of our employees, our community, and our customers. All office and supporting staff will continue to work from home and shelter in place. Those who are required to come into our facility will make all possible efforts minimize to contact with one another while they work through this pandemic.

To that end, please keep in mind that we are currently running with limited staff and shorter hours. For fastest response please contact us directly by email at info@ws2coating.com or call (408) 723-0700 to check current status.

Our staff is working diligently to process all current or previously delayed orders and move forward with new orders.

Thank you for your patience and understanding during this difficult time.
-Brian Geranen, President