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topic 3758

Treatment of old iron cannon barrels


In response to treatment of cannon barrels.Many museums use a treatment of Tannic acid 20 percent-adjusted to a PH of 2.5-3.0 for preservation of old iron artifacts.This can be done safely at home.This was discovered by Pelican in 1966 and Knowles and White in 1958.I have used on only one piece with excellent results and plan to do another one on y early 18th century English tube.Proceed as follows-for max protection brush on several coats of 20 tannin solution (200 g. tannin,1 liter water,150 ml ethanol)The more the better-completely dry between coats.Loose rust not removed becomes harder-and finished artifact has been chemically sealed.

Richard Gaysowski
- Haltom City Texas

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