Five Benefits of Phosphate Coatings: Rust Prevention and More

pile of dark gray metal screws

Five Benefits of Phosphate Coatings: Rust Prevention and More

There are many types of industrial coatings to choose from, but phosphate coatings stand out. Not only are they a versatile and reliable option, they also have an extensive range of applications. Phosphate coatings can enhance durability, provide corrosion resistance, improve mechanical performance, promote paint adhesion, and more. 

Phosphate coatings are chemical treatments applied to metal surfaces in order to enhance properties like lubricity and rust resistance. The coating is formed during a chemical reaction between the metal surface and a phosphate solution, which produces a crystalline layer that is chemically bonded to the substrate. Typically, manganese crystals are used to create the phosphate coating. 

Five Benefits of Phosphate Coatings

1: Enhanced Corrosion Resistance

One of the primary benefits of phosphating is its superior resistance to corrosion. The phosphate layer prevents rust by shielding the underlying metal from exposure to moisture, chemicals, environmental pollutants, and other corrosive elements. This property is especially crucial in the automotive, aerospace, and marine industries, where equipment and machinery are subjected to harsh operating conditions on a daily basis. 

2: Improved Paint Adhesion

Paint adheres better to rough surfaces, and because phosphate coatings roughen the substrate’s surface, they are often applied as a pre-treatment before painting. Better paint adhesion also requires a clean surface, and the phosphate coating process involves meticulous surface preparation. This benefit is essential in applications where painted surfaces face mechanical stress, like industrial machinery and automotive parts. 

3: Better Lubricity

By modifying surface texture and composition, phosphate coatings also reduce friction between moving parts. As a result, phosphating ensures that coated components move more smoothly, minimizing wear and extending their lifespan. Phosphate coatings are often used to improve the lubrication of hydraulic systems, turbines, compressors, and other machine parts.  

4: Galling Prevention

Galling is a form of severe adhesive wear that occurs between sliding surfaces under high pressure. Phosphate coatings help reduce friction, and are often used as an anti-galling finish to ensure smoother operation and a longer lifespan. Industrial machinery and other heavy-duty components can particularly benefit because phosphate coatings mitigate the risk of galling. 

5: Reduced Surface Glare

The textured surface created by phosphate coatings also reduces light reflection. This non-reflective coating is especially beneficial for outdoor equipment, firearms, and other applications where glare reduction is critical. 

Manganese Phosphate Coating Provider in Phoenix

Phosphating plays an important role in enhancing the performance and longevity of metal parts in many industries. However, applying phosphate coatings takes the knowledge and careful handling of a professional team. If you’re in need of superior metal finishes, choose CRC Surface Technologies to get the best results. Call us at 602-253-4175 today or email to request a quote.


Images used under creative commons license – commercial use (5/1/2024). Photo by Alex Tepetidis on Pexels