background bubble helix decoration

Solid Film Chrome Coating

Hybrid Coatings (Gullon)

Armoloy’s Nodular TDC combined with Solid-Film Coatings

solid film chrome coating

For Maximum Wear and Lubricity

Gullon® combines Armoloy Thin Dense Chrome with a choice of solid-film lubricants tailored to specific applications, creating a wear-resistant, lubricated surface. This coating is particularly useful in scenarios where components face long periods without maintenance or are used in non-lubricated applications.
The process involves applying nodular, microscopic spheres of TDC, followed by a thermoset top coating that enhances lubricity and corrosion resistance. Common topcoat, solid-film coatings include Molybdenum Disulfide, PTFE, or other Teflon-type products best suited for your application.

Optimal Lubricity with Wear Resistance

The Armoloy Corporation helps global manufacturers protect their most valuable, high-precision components with a broad spectrum of engineered compositions of thin dense chrome coatings.

At Armoloy, our engineering team meticulously assesses each application to select the most suitable surface texture and co-deposit. This careful and technical process not only protects metal components from potential failures but also enhances their operational efficacy and durability. With the introduction of Gullon®, a hybrid coating solution, we have made a notable advancement in addressing the challenges of friction and load bearing for metal components.

Request information

Gullon Highlights

  • Chemically resistant
  • Improved corrosion resistance
  • Inherently lubricious
  • Prevents galling
  • Absolute adhesion
  • Load bearing

Proven applications

Applying Gullon® can improve the long-term performance of applications within the following industries, as well as many others:

  • Injection molding
  • Pumps and compressors
  • Linear motion
  • Valves and rods
  • Bearings
  • Salt and brine environments


  • Aerospace Material Specification SAE AMS2438 Plating, Chromium Thin, Hard, Dense Deposit
  • MIL—C-23422 Military Specification, Chromium Plating, Electrodeposited
  • Aerospace Material Specification SAE AMS2406 | AMS-QQ-C-320, Chromium Plating (Electrodeposited)
  • Aerospace Material Specification SAE AMS2460, Plating, Chromium
  • AMS2406 Plating, Chromium, Hard Deposit
  • ASTM B650 Standard Specification for Electrodeposited Engineering Chromium Coatings on Ferrous Substrates

Performance Characteristics

Gullon by the Numbers

  • Surface hardness up to 78Rc
  • Taber Wear Index (TWI) as low as 0.7
  • 1000+ hrs Salt Spray
background screw
  • 10% - 67% reduction in coefficient of friction
  • Effective deposit range of .000050” to .0007” (1.27 to 17.78 µm)
  • Low processing temperature, <150° F (<65°C)
background screw
background bubble helix decoration


Features & Benefits

High wear resistance

Provides exceptional durability against wear and tear

Enhanced lubricity

Reduces friction, enhancing the efficiency and lifespan of components

Corrosion resistance

Offers protection against corrosive environments, extending component life

Absolute adhesion

Coating adheres atomically to base metals, preventing peeling, chipping, and flaking

Low friction

Maintains a low coefficient of friction (0.02 to 0.10), ideal for moving parts

Load bearing capacity

Combines strength with elasticity, supporting heavy loads without deformation

Thin, precise deposits

No post plate machining required. Does not affect part tolerances or balance

No sharp edge buildup

Minimizes dimensional change

The Science Behind Gullon

Hardness: The polymer topcoat is quite soft and typically wipes soon after actuation or initiation of service of the process part leaving the 78Rc nodular wear surface with trapped lubricant to act as the wear interface.

Surface Finish: The appearance of the processed part will be that of a smooth, coated part and can be provided in several colors with black and blue the most common choice. Once placed in service, and the top coat has been wiped, the surface retains the solid film particles even though the Armoloy wear surface is visible.

Density: The dense nature of the Armoloy TDC® coating means high corrosion resistance as the coating is almost free of micro-cracks (conventional chrome +/- 40 micro-cracks per cm2).

Gullon, with its dry-film lubricant can solve numerous problems, including friction/wear, corrosion, temperature extremes, sticking, vibration, galvanic activity, electrical insulation and conductivity. No requirement for post finishing (except special applications). Gullon is very slippery, very hard and resistant to most industrial corrosive environments.

Additional Metal Treatments

background bubble helix decoration

How Metals Fail

Some of the most common metal failures include:

Armoloy’s different metal coating solutions help industries avoid costly metal failures and unplanned downtime.

Partner With Us

Eliminate metal failure from your operations. Meet our group of curious, innovative engineers and learn how we can help improve your industry with science-based solutions.