1840 Patent sealed: 'Specification of the patent granted to ARTHUR WALL, late of Bermondsey, but now of 71, Wapping Wall, Surgeon, for a new composition for the prevention of corrosion of metals, and for other purposes. Sealed May 2, 1840.'
This involved a complex process, using diluted muriatic acid, to which was added red-hot iron filings, then boiling the mixture for 24 hours. This was repeated several times. The resulting iron oxide was dried on a red-hot iron plate. Mercury was added, followed by various pther processes, before adding black or red lead. Prior to applying to a metal surface, linseed oil and turpentine were added. After the paint was applied to a metal component, the component was gradually heated at 300 degF.
1843 Advert: 'WAREHOUSES PROTECTED AGAINST FIRE.
OWNERS of Warehouse Property and Builders are requested to inspect Messrs. Brown, Shipley and Co.'s two Warehouses in Chapel-street, the Doors and Windows of which have been recently covered with WALL'S PATENT IRON, which resists oxidation or corrosion.
Parties may have their own Iron prepared, and specimens for Roofing, Spouting, and Guttering may be seen, by applying to [[M. Divitt and Co|M. DIVITT and Co. 13. Cable-street.'.
Does this relate to Arthur Wall's patent?
Sources of Information
-  The Repertory of Patent Inventions: And Other Discoveries and Improvements. New series, Vol XVI, July - Dec 1841
- Gore's Liverpool General Advertiser - Thursday 23 February 1843