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In any given working environment, the lifetime and performance of components is influenced by the phenomena it will encounter, such as corrosion, wear, fatigue, thermal effects, etc. An optimal solution requires a deep understanding of the purpose and the environment to which the component will be exposed.

Whether on the surface or beyond, Oerlikon Metco provides economic solutions to enhance components’ lifetime, performance and reliability. The functional solutions here are some of the many where Oerlikon Metco’s application-tailored methodology has successfully solved the design challenges faced by our customers.

Oerlikon Metco understands wear in all of its forms. We can recommend the right coating solutions to protect your components and systems from specific wear risks. Wear is the undesired removal of material from a component through tribosystems such as abrasion, adhesion, cavitation, erosion, fatigue and stress cracking, fretting, and impact. When components slide against one another, the friction arising can wear the part through galling and overheating. In combination with a corrosive environment, tribocorrosion will occur. This synergistic effect can cause very rapid loss of material, component failure, and machinery seizure. Surface technology can effectively reduce the friction coefficient, prevent wear and improve lubrication.

When components slide against one another, the friction arising can wear the part through galling and overheating. Wear is the undesired removal of material from a component through tribosystems such as abrasion, adhesion, cavitation, erosion, fatigue and stress cracking, fretting, and impact. In conjunction with a corrosive environment, tribocorrosion will occur. This synergistic effect can cause very rapid loss of material, component failure, and machinery seizure. Surface technology can effectively reduce the friction coefficient, prevent wear, and improve lubrication.

Impact

Impact is the sudden striking of one object against another with high force. Repetitive impact often causes materials to weaken and crack.

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Sliding Wear

Sliding wear is a general term for the mechanism of removing material due to sliding contact of solid surfaces. Due to the relative motion at the contact area, material may be removed from one part or both. Sliding wear may appear with adhesive wear and abrasive wear depending on the relative surface speed, surface hardness and coefficient of friction. A common method to rank surfaces on sliding wear is the Block-on-Ring-Test (ASTM G77).

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Fretting

Fretting is damage caused by low amplitude vibration and/or small oscillations between two surfaces in contact with each other. This damage often goes unnoticed for a long time. Over long periods, particularly at high temperatures or in corrosive environments, this friction can lead to fatigue cracking and loss of component functionality.

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Adhesion

When surfaces slide relative to one another, there is a tendency for one material to transfer onto the counterface. In its most severe form, adhesive wear results in galling and possibly machinery seizure through cold welding.

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Erosion

Erosion is caused by solid or liquid particles striking the surface of a component. The severity of wear strongly depends upon the velocity and hardness of the particles, as well as the angle of impact. It is crucial to consider all these conditions when designing a surface solution.

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Cavitation

Cavitation wear occurs on surfaces exposed to fluids in which entrained bubbles collapse at or near the surface. The collapse releases a jet of fluid that impacts the surface causing a severe hammering effect.

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Abrasion

Abrasion can result in very rapid wear. It is classified into two primary mechanisms: In two-body abrasion, a hard rough surface scratches, cuts or spalls a softer surface. In three-body abrasion, a hard third body damages one or both of the sliding surfaces, usually due to grit or dirt getting in between the sliding interface. This wear can be minimized by hard coatings strongly adhered to the substrate.

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Friction

Friction is the force that resists motion between the surfaces of two components in contact with each other. In engineered systems, there is often the need to either reduce friction or increase friction. The right coating solution can help in either case.

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