Anti-Slip Tread for >450F, Corrosive Environment 1

[tjwalker11]

I have an application that needs to bond a rough surface (Ra 300-2000) to a 5" radius cylindrical mild steel part. The challenge is the part is used in a >450F continuous and HCl vapor environment.

Any suggestions for both the rough surface and bonding technique?

I'd love to find a shrink tube with rough outer surface. I'd also welcome a combination of an anti-slip or abrasive sheet (at least 18" long) and a bonding adhesive or tape to hold it in place. The high temp and HCl seem to rule out many options.

tjw

 

[aspearin1]

Have you considered plasma coating? These ceramics are often used as heat shields as well as abradable layers. They end up a finer, sand paper type finish. You may be able to find a particular coating that is compatable with the HCl environment.

aspearin1

 

[tjwalker11]

Yes, both "plasma" coatings (like a tungsten-polymer blend) and ceramic-polymer coatings MAY meet this requirement. Each of these options is likely $500+ per cylinder (which I have a number of), so I'm looking for a lower cost option. Machining the steel cylinders with a groove or knurl pattern will also likely solve the problem for the same amount cost-wise. tjw

 

[aspearin1]

If that's the case, then how about about water jet? High pressure water can likely etch the steel to a suitable texture. It would be much faster than any machining and save you the coatings. A heavy grit blast may also be an option.

aspearin1

 

[tjwalker11]

Thanks. That's a good idea. We had talked about sand-blasting (or as you've suggested grit-waterjet abrasion). We may have to revisit this option. This also addresses the need for "how to clean?" these rollers, besides emory cloth and steel brushes.

Do you have any leads on who could do this service? Is it possible to do it "in-house", not necessarily on the machine, but at the plant site? (I can search this out myself if you don't have a lead.)

Thanks again,

tjw

 

[aspearin1]

Sorry... My experience with the Water jet was at Pratt and Whitney. They have done some outsourcing of services to non-aircraft parts, but the business unit strategically plans their jobs based on the best cost/man-hour part. I'd expect a slow turn-around for what you have.

aspearin1

 

[IFRs]

Could ou knurl them on a lathe?