First, Novartis looked at the coating used on the tooling to overcome the sticking/picking issues, trying several different coatings including HC (Hard Chromium
), CrN (Chromium Nitride) and TN (Titanium Nitride).
As a result of this, thermal spray coatings have gained traction as a replacement for hard chromium
plating in the aerospace industry.
By applying a hard chromium
electroplated finish, the rotors are protected and what's even better, once they have been in operation for a given amount of time, they can be refurbished, thus conserving raw materials and saving energy by not having to produce brand new components.
40Cr was precoated with electroplating hard chromium
, and orthogonal experiment was used to realize the electron beam alloying processing.
Rie, "Plasma Nitriding and Plasma Nitrocarburizing of Electroplated Hard Chromium
to Increase the Wear and the Corrosion Properties," Surface and Coatings Technology, vol.
For wear resistant properties of the liner, ductile manganese iron or hard chromium
iron is used.
Spirax Sarco TVA uses a profiled stainless steel cone with a large, smooth surface area plated in hard chromium
to resist erosion from wet steam, for a long and reliable operational life with recalibration rarely needed.
As a matter of fact, top piston ring of the engines is very often covered with a hard chromium
coating to ensure its longevity; this coating is obtained via an electrolytic process which requires the use of hexavalent chromium ions.
Winners included Accord Housing Group; steel distributors Atlas Ball & Bearing; Bloxwich Engineering; pressings company Genex UK; Grammer Seating Systems; engineering and hard chromium
plating specialists Hardchrome (Dudley Engineering); and ironmonger Kirkpatrick.
The same applies to suppressants for non-decorative hard chromium
and hydraulic fluids for aviation.
All exposed surfaces are AISI 316 stainless steel or hard chromium
Options include: pre-compression force transducer, take-off force transducer, and safety interlocked doors