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Pine Beach, NJ

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Galling stainless....help

Q. My company has designed and built a conveyor system that transfers mild steel pallets through a parts washer. The pallets ride on stainless steel rails and are trapped top and bottom and side to side. The issue is the 300 series stainless is galling rapidly and the hydraulic system no longer has the force to move the pallets. each pallet weighs 50 lbs. Does anyone know of a coating that would reduce the wear of the pallets and prevent the galling. While not allowing the stainless to wear faster than the pallets. Or should the pallets be made of a different material?

Chris Goulet
- Livonia, Michigan
2003

A. Camcar a Division of Textron corp produces a type of anti-galling 300 series SS called camtronic. They also produce lot of anti-galling fasteners for hard disk drives which mate with Aluminium. You can explore this or you can go with a Ni-PTFE coating over ss to improve the anti-galling property.

Good luck ..

Karthik Thambidurai
electronic components - Norwood, Massachusetts
2003

A. There are surface hardening techniques for stainless steels that can improve wear resistance and galling. Kolsterising from Bodycote is one such process.

Toby Padfield
- Troy, Michigan
2003

A. Chris,

Have you tried any Urethane yet ... not the store bought 20% or so but the McCoy 2 component. Very abrasion resistant and, when wet, extremely low coeff. of friction.

The urethanes were never my field (not acid resistant enough).

Another thought is to line, if you can, your hoppers with Polyethylene. The best Pe being the uhmw Pe in terms of abrasion resistance. Their 'dry' friction is less than Pu. But first of all just try some h.d. PE (high density) sheeting as an experiment.

Freeman Newton [deceased]
(It is our sad duty to advise that Freeman passed away
April 21, 2012. R.I.P. old friend).
2003

A. We are e-coating nuts and bolts for this very purpose. So, might I suggest E-Coating?

Glen J. Bartolotti
- Arlington, Washington
2005

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