US158902A - Improvement in metal-coating compositions - Google Patents

Description

'rnn STATES ATENT EDWARD J. W. BURRAS, OF PARISH OF LAMBETH, ENGLAND, ASSIGNOR OF ONEHALF HIS RIGHT TO GEORGE G. BREWER, OF BALTIMORE, MD.

IMPROVEMENT lN METAL-COATING COMPOSITIONS.

Specification forming part of Letters Patent No. 158,902, dated January 19, 1875; application filed December 26, 1874.

as a paint, and which will set and form a protective coating which will stand the ordinary usage to which such surfaces may be subjected, but which may be conveniently removed, when desired, by means of naphtha, turpentine, or equivalent substances, as will be fully hereinafter set forth. 9

My invention is particularly designed for 1 the protection of all bright metallic surfaces liable to oxidation or corrosion, where it is not desirable to apply a permanent paint, such as the metallic portions of seagoing vessels, silver or plated ware, and other metallic articles that are to be laid aside for a time, which are required in their original bright condition when in use.

My invention consists in a composition of chalk or whiting, china clay or kaolin, calcined sulphate of iron, copper, zinc, or other well-known drier, refuse fat, and linseed-oil, the whole being brought to proper consistency by means of naphtha, turpentine, or equivalent diluent, the solid ingredients being finely comminuted by grinding, audthe whole thoroughly incorporated by means of heat.

The above ingredients may be mixed in various proportions, according to the nature of the surfaces to which it is to be applied, and the temperature to which the articles may be subjected. For most purposes the following proportions will answer etfectively, viz:

To a ton of two thousand pounds, twelve hundred pounds of chalk or whiting; ninetynine pounds of china clay or kaolin; one pound of sulphate of iron or other drier; seven hundred pounds of refuse fat.

which is only fit for the manufacture of the inferior varieties of soft soap, and which can be obtained at a small expense.

The composition as thus formed is, at ordinary temperatures, of about the consistency of the ordinary glaziers putty. It may be packed in canisters of any desired sizesay, twenty-eight pounds, for instanceor may be formed into bars or cakes, and placed in the market.

It is applied by heating it to about 212 Fahrenheit, by placing it in the can or other suitable vessel until melted, and then-laid on by means of a brush, or in any other convenient manner. In a few hours it will set, forming a coating having the appearance of white paint, which will efi'ectually prevent injury to the metal from oxidation or the action of corrosive agents. It is a most effective coating for metallic s'ea-goin g vessels, and may be applied to the bottoms of the same, and the various other metallic parts. Vessels thus coated will be entirely free from barnacles and other parasites which usually collect on their bottoms during a voyage, and all the metallic parts of the same will be preserved in their original bright condition, it only being necessary on arrival at port to rub off the composition by means of a rag saturated with naphtha, turpentine, or equivalent substance.

Various metallic articles which are put by for use can be maintained in a bright condition for any period of time by coating with the composition, such as silver ware and plated ware, for instance, as no corrosion can possibly take place, as the compound resists the action of acids and all the ordinary chemical reagents.

To restore them to their original beauty and FFIGE.

polish, it is only necessary to remove the composition, as above described, which can be done at very little expense, and in a short time.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A composition, consisting of chalk, china clay or kaolin, sulphate of iron, copper, or zinc, refuse fat, and linseed-oil or naphtha,

substantially as described, for coating various metallic surfaces to prevent oxidation and corrosion, as set forth.

In testimony that I claim the foregoing I have hereunto set my hand.

EDWARD J. W. BURRAS.

Witnesses:

JAMES L. NORRIS, GEO. W. OUSHING, Jr.