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Technical Conservation Forum | Treatment of wrought- and cast-iron
Technical Conservation Forum
>> Treatment of wrought- and cast-iron
Posted: 30/6/2012 9:31:32 PM
Am involved with the restoration of a cast- and wrought-iron roof truss of c.1830 at a former beam engine house at Caledon, Co Tyrone. Most of the metalwork is in reasonable structural condition, but corroded. No evidence that it was ever painted originally. To prevent future corrosion, some form of rust inhibitor/ metal preservative seems advisable.
There is, of course, the option of paint, but this may eventually start to flake off and be difficult to reapply to the in-situ truss.
Something I've used in the past with metal shafts and gears in watermills is Waxoyl - fairly robust, reasonably priced, easy to apply and touch up, and doesn't detract from the metalwork's appearance.
I've recently come across OWATROL OIL, which claims to do much the same thing.
Has anyone any experience of this oil for historic metalwork? If so, what are the pros and cons?
Posted: 4/7/2012 9:02:57 PM
That's a very interesting question. We have passed it to our metal's specialist. If you need a faster reply, you can contact our technical research team on the following e-mail
I hope this is helpful! Cheers!
Posted: 6/7/2012 10:30:24 AM
I have spoken to one of our experts and here is his response to your query. I hope you find this helpful, do not hesitate to get back in touch if you need any further info!
We have used Owatrol as a base layer in paint trials on some exposed metalwork in Orkney, and as a drying oil we were able to paint it - it seems ok to date. We went for Owatrol because it is a penetrating oil – so it went into the rusty matrix we were seeking to consolidate. I see what you mean with Waxoil, and it would probably do the same thing, but is it not quite stiff and sticky? I Might be inclined to the Owatrol. My suggestion is to do a sample of both and see if it gives the finish (and penetration) you want.
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