WMV



Sliding parts with undesired
friction and galling risk

Lunac 2+ use in non lubricated systems

 



Lunac 2+ applied to non lubricated parts in translation


Originally Lunac 2+ was developed for this specific task, for which a high content of modified technical ceramics and a new kind of matrix had to create optimal friction conditions and strong anti-cold weld properties. After 7 years of developement we indeed obtained this material. Yet, apart from the perfect bond that can be established with the substrate, Lunac 2+ and later Lunac 2hc+ showed many other very interesting characteristics, as mentioned on the Lunac 2+ main page. In this application the lowered friction (see the coefficient of friction diagram) becomes very clear, in combination with the strong anti-coldweld properties from lunac 2+ as well as Lunac 2hc+ (see the adhesive wear diagram) . Not only sliding parts which encounter adhesive as well as abrasive wear, but also slightly moving/vibrating parts that suffer from tribo-oxidation will behave as technical ceramic parts in the case they are coated with Lunac 2+. The major advantages are the totally different and easier (cost saving) manufacturing procedures and the presence of elastic metals under the coating. Not seldomly, concepts that cannot or hardly be lubricated become feasible because of Lunac 2+ coatings.






The interiour of this valve has been coated with highly tolerated Lunac 2+ to correct the diameter and to protect this stainless steel part from adhesive wear and fretting. Ceramic spray coating guns were not able to operate in this structure











Besides Lunac 1 non stick coatings applied to the conveying canals of displayed screen changers, thick Lunac 2(hc)+ coatings are often applied to the mechanical heavily loaded piston- and cylinder surfaces. A nitrided steel surface (e.g. DIN 1.8519 or 1.8550) normally displays scratches after some time, that can lead to a completely jammed piston. Despite the amount of effort, the increased reliability pays off. A side effect proved to be due to the Lunac 2+ non stick effect, plastic break down products hardly built up between the pistons and cylinder.