How to Prevent Galling

Galling can be extremely frustrating and costly when it occurs. Seized fasteners can slow production resulting in lost time and money. Avoid down time, damaged threads, broken bolts, and costly repairs by eliminating friction with Dicronite®.

What is Galling

Galling is a form of wear that can occur when two surfaces slide along one another. While galling can occur on any surface contacts with sliding motion, it is most commonly considered on threaded components.

The relative motion between the surfaces creates friction and shear stress that results in pieces from the microscopic structure of the surfaces to break off. In threads, this damage results in increased pressure between the surfaces and causes even more friction and wear. 

a galling bolt

Eventually, if threads begin galling and continue to slide against one another, the materials can fuse and bind together. This is also known as adhesive wear or cold welding. Once threads begin galling, they typically get worse and can ultimately seize.  

What causes galling in threads? 

Excess friction!  When two materials are sliding against each other with enough friction it can cause adhesive wear. Asperities, or “peaks” on the microscopic structure of the surface, bear much of the force between the surfaces. Because of this, they can be broken off and even begin cold welding to the opposing surface. 

For some materials such as stainless steel and aluminum, friction between threads results in wear of the material’s oxide layer (a protective outer layer) which exposes its more reactive layer underneath. The reactive layer is then more prone to cold welding.

What factors can influence galling? 

When does galling occur? 

Galling occurs during the installation and removal of threaded fasteners. As threaded surfaces rub against each other they are susceptible to wear and cold welding, especially when significant force is involved. This can cause components to seize, break, and lead to costly downtime.

How do you prevent galling & seizing? 

Anti Galling Coating

Dicronite has been widely used as an anti-galling/anti-seize coating for 65+ years; giving engineers and technicians confidence that components within their often-complex mechanical systems won’t seize. Dicronite can help eliminate galling on all metals and most plastics.

Our dry film lubricant helps eliminate galling and seizing by minimizing the friction between surfaces. By functioning as a lubricant between mating threads, surface damage is eliminated, and the risk of seizing is removed.

Why should you use Dicronite? 

Dicronite® is the trusted anti-galling coating and has helped reduce friction and prevent seizing for 65+ years. Avoid the frustration and costly down time of galling components. Trust that your components won’t freeze up and break during installation or removal. Speak with one of our experts today. 

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Sliding Wear

Sliding wear occurs when two surfaces slide against one another causing material loss to one or both surfaces. Over time, this can result in component failures, additional maintenance, and costly down time.  

Coating components with Dicronite® can help minimize this wear and reduce the need for maintenance and down time.

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Tight Tolerance Lubrication

Extremely tight tolerances can present challenges when lubricants or coatings are needed to reduce friction. Many products are available to help reduce friction, but in the case of very tight tolerances, few can be integrated without the need for adjustments.

Dicronite® has an average thickness of 0.5 microns (0.00002 inch) or less. This precision thin film allows users to incorporate Dicronite® on designs with tight tolerances without the need for design or manufacturing changes.

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Vacuum Environment Lubrication

Vacuum environments present a challenge for lubrication. Many conventional lubricants aren’t effective under vacuum and are largely vaporized.

Dicronite® can be used in vacuum to reduce friction where other lubricants can’t function. The outgassing of Dicronite® under vacuum conditions is well below screening levels for spacecraft materials per ASTM E595.

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Energy Lost to Friction

Friction is wasted energy! Systems with critical mechanical power output need to be extremely efficient.

Dicronite® optimizes mechanical efficiency by reducing friction losses and can even work in tandem with existing lubrication to further optimize efficiency.

Dicronite® is especially useful in precision systems, extreme environments, or where minimizing size and weight is vital.

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Fretting

Fretting is a unique form of sliding wear that occurs when contact surfaces oscillate over a very small range of motion. Although it may seem minor, this surface wear can ultimately lead to fatigue cracking and devastating damage.

Dicronite® helps remedy fretting by providing lubrication at contact surfaces. This effectively reduces the wear and surface stresses that cause so much damage.

Dicronite® can be integrated into existing designs and assemblies without any other adjustments for seamless reduction of fretting wear.

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Extreme Temperature Lubrication

Extreme low or high temperatures can be challenging environments for lubrication. At low temperatures, conventional lubricants may be too viscous to be effective, while extreme high temperatures can result in breakdown of the lubricant.

Dicronite can be used in extreme environments to ensure effective lubrication while also being used in combination with oils and greases.

Dicronite is stable across a wide temperature range:

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Excessive Heat from Friction

As friction in an assembly generates heat, elevated temperatures can result in unwanted operating conditions.

This can cause overheating and accelerate the breakdown of materials, resulting in costly maintenance and down time or destructive failure.

Proper lubrication can help minimize friction, reduce heat, and increase mechanical efficiency. Coat parts with Dicronite® to avoid excessive maintenance and ensure components will run as efficiently as possible.

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