collection of various bearing and gear types with Armoloy Thin Dense Chrome

Armoloy Coatings

Gullon Hybrid Coating

Nodular TDC with solid-film lubricants for wear protection

Gullon coating is processed exclusively at our Armoloy Texas fulfillment center for precision and consistency

What is Gullon

Gullon is a high-performance hybrid coating that combines Armoloy thin dense chrome with solid-film lubrication to protect metal parts from extreme wear, friction, and corrosion. It delivers a self-lubricating, low-maintenance surface ideal for demanding environments where traditional lubricants fall short.

By layering nodular TDC with a tailored solid-film lubricant, Gullon creates a duplex system that delivers exceptional surface hardness, low friction, and long-term corrosion resistance—without compromising dimensional tolerances.

The micronodular TDC base offers up to 78 Rc hardness and strong adhesion to both ferrous and non-ferrous metals. A thermoset solid-film lubricant, such as PTFE, MoS₂, or graphite, is then applied over the base and bonded to meet specific performance demands, including dry lubrication, galling mitigation, and resistance to chemical exposure.

Gullon is especially effective in powder-injection-molded parts, medical and food-grade components, linear motion systems, and other applications where lubrication is limited or inaccessible. The result is a low-maintenance, self-lubricating metal surface that resists wear and reduces unplanned downtime.

Optimal Lubricity with Wear Resistance

Armoloy 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.

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ASTM B578 testing methodology electroplated coatings hardness test

Performance Characteristics

Gullon by the Numbers

Surface hardness up to 78Rc
Taber Wear Index (TWI) as low as 0.7
1000+ hrs Salt Spray
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)

Gullon Highlights

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

Proven applications

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

Certifications

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

Gullon 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. Has very little impact, if any, on part tolerances or balance

No sharp edge buildup

Minimizes dimensional change

Additional Metal Treatments

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Microcracked thin dense chrome plating offers a proprietary chemistry of pure chromium that increases both hardness and wear resistance.

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AL-COAT ensures premium protection for aluminum alloys by providing a high-chromium coating that is also both dense and non-magnetic.

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Mid Phosphorus Electroless Nickel Coating

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High-phos Electroless Nickel Plating

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Nickel Teflon – Nyflon

A co-deposit of electroless nickel and PTFE (Teflon®), Nyflon is the gold-standard for applications requiring increased corrosion resistance, hardness, and lubrication.

Why Partner with Armoloy?

Armoloy supports your project from concept to production with surface engineering expertise built around real-world performance needs. Whether you are designing a new component or solving a failure in the field, our team can help identify the right coating solution, validate its performance, and support a successful production launch.