Thin tape
Thin tape
(OP)
I'm looking for a tape that is very thin. Thinner the better as I am actually looking to have it wear out through mechanical abrasion. Any suggestions?
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RE: Thin tape
I mean, are we talking sellotape or something more exotic?
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Thin tape
Might not have to be tape, could be paint on coating?
I know it's a little vague, but abrading through the tape/coating is inention here. It needs to protect the surface it's applied to until you abrade though the tape/coating, at which point it exposes the surface.
sellotape may not work for application methods.
RE: Thin tape
RE: Thin tape
RE: Thin tape
To give you a feel here on how setup abrades steel (time and depth) currently it takes about 6 months abrading steel shaft before I see issues I am trying to mitigate and it only abrades it less than .0001 or less per SEM imaging.
So either need something thin or soft or both.
Not trying to be vague here, just trying to expand on a thought to solve my issue.
RE: Thin tape
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Thin tape
RE: Thin tape
RE: Thin tape
RE: Thin tape
RE: Thin tape
As shaft surface abrades it rusts, so loses electrical conductivity which is necessary for product to function. Cleaning shaft periodically solves problem, but item isn't located in accessible area for maintenance. Can't change shaft material or coat shaft with say electroless nickel or some other coating as shaft isn't our component piece. Can't change material abrading surface -- this is our component, and tried that but effects other functionality of product. Have yet to discover any electrically conductive through coatings/tapes/paints, etc. that can be applied in the field to resolve shaft rusting issue as most times our product is a field retrofit that will still allow product to function.
Any suggestions on conductive through tapes/paints/coatings easily applied in the field would solve my problem.
Sacrificial abrasion surface thought is to be able to periodically expose area of fresh shaft surface periodically.
I've thought about the adhesive making a gummy mess which makes me lean towards spray paint/nail polish choices. I'm actually going to rig up a test using nail polish. Issue I see with spray paint/nail polish type choices though is how thick the customer applies it in the field which effects how fast wear through layer. This makes me lean towards adhesive tapes as then I know how thick my sacrifical wear coating is.
Hadn't thought about the heat on the shaft loosening the adhesive on the tape.
Removing protective coating right before final assembly is a no go as the issue I'm trying to mitigate happens during use of the product.
Does this help get rid of the vague-ness? I'd love to solve it another way and open to suggestions on how to do that, but right now accessibility and what items I have ability to change and control are driving a lot of the decisions.
RE: Thin tape
RE: Thin tape
RE: Thin tape
Remove the moisture, prevent the rust?
Regards,
Mike
RE: Thin tape
RE: Thin tape
SnTMan: It's just abrading a plain Carbon steel shaft. My guess is that as it abrades the surface it exposes fresh Iron which then rusts by reacting with the air giving you an iron oxide Fe2O2, Fe2O3, etc.. Moisture in air is probably only source of any water present, but I have no control over customers environment and be tough sell to try to convince them to control the environment.
dhengr: Can't modify portion of our part that rides on shaft due to how it works and proprietary processing methods already developed around it that require use of the specific material (I apologize for being vague on what material abrading shaft is, that part is proprietary to company, but lets just say it's really really hard).
I don't think we get any real polishing taking place due to very low normal force between our part and shaft. As mentioned earlier wear over 6 months is less than .0001 inches. I have a suspicion that the "micro-abrasion" may be doing something to surface level grain structure in some way. We've discussed collars, but that then becomes a maintenance item. Also opens us up to any galvanic corrosion between collar and shaft as most likely would want collar to be either hard chrome coated or stainless due to the wearing issue.
RE: Thin tape
RE: Thin tape
http://www.graphalloy.com/html/PDF/DS870.pdf