Coating of silicone or graphite onto stainless steel surface
Coating of silicone or graphite onto stainless steel surface
(OP)
Does anybody have experience to share regarding silicone or graphite coating of stainless steel surfaces?
Interesting areas are production methods for coating, optimal thickness of coating layers in production versus time for drying, fast methods to dry the coating, i.e. all practical input regarding process.
Technically, the coating is there to provide gas sealing between two sheet metal parts with a mechanical joint.
Interesting areas are production methods for coating, optimal thickness of coating layers in production versus time for drying, fast methods to dry the coating, i.e. all practical input regarding process.
Technically, the coating is there to provide gas sealing between two sheet metal parts with a mechanical joint.





RE: Coating of silicone or graphite onto stainless steel surface
Dirk
RE: Coating of silicone or graphite onto stainless steel surface
m.kathirvel
RE: Coating of silicone or graphite onto stainless steel surface
The initial development of this product was to provide a lower cost to pure silicon carbide counterseats used on mechanical seals. What we are finding is that this plating is also ideal against other dynamic sealing applications, such as C seals or other. Advantage here is extreme hardness and therefore long life.
By dispersing graphite (or teflon) in the nickel-base plating, we get excellent dry running capabilities, as carbon is considered "self lubricating". Depending on your application, it may be possible to combine two or more secondary particles.
The plating thickness is directly related to the length of time in the bath. Most of our platings have been in the 0.025mm to 0.06mm range prior to grinding. Higher thicknesses are possible as well.
Depending on your application, the high carbon steel washers may need to be ground. We have found the initial coating to be somewhat uneven, and needs to be ground to an acceptable level.
If you would like more information, please advise.
RE: Coating of silicone or graphite onto stainless steel surface
RE: Coating of silicone or graphite onto stainless steel surface
For further details, please view http://www.precisionseal.com/cec.html
RE: Coating of silicone or graphite onto stainless steel surface
RE: Coating of silicone or graphite onto stainless steel surface
RE: Coating of silicone or graphite onto stainless steel surface
I am not aware of a method to electroplate rubber compounds. Electroplating requires conductivity; this is given in typical metals, but more difficult in non metallic materials. With any non-metallic materials, it is necessary to first place a layer of nickel on the substrate to warrant conductivity. This is possible with hard plastics, but I am not aware of a method to apply to rubber compounds. My guess is that due to the flexibility of rubber compounds, the plating will flake off immediately. Borough, a plastic e-plater in Europe (find them on the web) states "The rule of thumb is that if it has to bend, don't plate it".
Here is my question: If you are attempting to coat (or imbed) graphite into rubber compounds, why don't you approach the manufacturer about this? This is successfully done in many applications without use of e-plate. I may be able to help you if you have difficulties finding a source.
RE: Coating of silicone or graphite onto stainless steel surface
Thanks.
RE: Coating of silicone or graphite onto stainless steel surface
Hope this helps.