to address a range
Thermal diffusion coatings for many applications
Greenkote® thermal diffusion coatings are available in three groups — PM-1, PM-10, and PM-21 — to provide a range of thickness, hardness and other characteristics. And within each group the specifications may be varied to tailor a coating to specific applications, topcoats or other requirements.
Using a proprietary thermal diffusion process, all of the Greenkote formulations offer exceptional corrosion resistance as well as strong adhesion, superior wear resistance, low friction, elimination of hydrogen embrittlement and excellent bonding to rubber, plastic and other topcoats.
Greenkote PM-1: 15–100 µm thicker coatings
PM-1 is a diffusion sacrificial corrosion-resistant coating of Zn-Al polymetallic composition. Its specific thickness can be adjusted to suit different applications, from 15 to 100µm. PM-1 is well suited for marine, industrial, and other challenging environments, including heavy construction projects that require superior long-term corrosion resistance combined with excellent torque lubricity and torque retention. And for applications needing additional hardness you may select the PM-1H process.
PM-1 coatings are ideal for carbon and low-alloy steels and cast irons. A good stainless steel replacement, it is also recommended for sintered and MIM parts. It is an excellent basecoat for painting, duplex coatings, adhesives and rubber to metal molding.
This coating line offers:
- Surface hardness up to HV 400 to 550
- Tested salt spray resistance up to 1200+ hr
- Long-term corrosion protection up to 600°C (1112°F)
- Resistance to damage during crimping and bending operations
- Low friction and resistance to seizing and galling
- May be welded in certain applications
Greenkote PM-10 and PM-21: 5–15 µm thinner coatings
Greenkote developed PM-10 and PM-21 thermal diffusion coatings mainly as a base layer for corrosion protection, and they are typically used with one or more topcoats, friction modifiers or sealers to achieve optimal performance. These thinner Greenkote coatings (5–15µm) work well for small, fine-threaded fasteners with standard and high-strength specifications. These are thin, diffusion sacrificial coatings for carbon and low alloy steels and cast irons.
PM-10 has zinc-aluminum composition and is recommended for stamped parts. PM-21 has zinc-aluminum-magnesium composition and is recommended for fasteners.
- Uniform coating thickness for difficult part geometries
- Surface hardness up to HV 320 to 400
- Uniform tightening torque
- Resistance to damage during crimping operations
- Long-term corrosion protection up to 350°C (662°F)
Even more Greenkote possibilities…
Greenkote PM thermal diffusion coatings are zinc based and provide galvanic +barrier corrosion protection for iron-based alloys along with improved hardness and adhesion to topcoats. But Greenkote technology can also be adapted to enhance performance in other types of coating applications — such as those requiring high-temperature oxidation resistance, increased hardness/wear, anti-seizing or reduced friction. If you have a special need, please give us more details about your application and our engineering team will evaluate the possibilities. We just might have a Greenkote solution for you!