US975124A - Anticorrosive coating. - Google Patents

Description

UNITED STATES FREDERICK E.. DODGE, OE

MALDEN, MASSACHUSETTS.

ANTICORROSI VE COATING.

Specification of No Drawing.

To all whom it may concern.

Be it known that I, FREDERICK I). Donor, known as a putt chaser, and ground for a citizen of the United States, residing at the city of M'altlen, in the county of Middlesex and Commonwealth of Massachusetts,

haveinvented a certain new and useful (Jomposition of Matter Entitled .Anticorrosivc Coating, of which the following is a specificat-ion.

The object of this invention is thecompounding of a coating or cement for appli' cation particularly to iron 'and other metals requiring protection a'ainst oxidation, for filling holes in metal, lor smoothing rough surfaces, and generally for coating objects with either a thick or a thin layer which rapidly burdens, and which when fully set cannot be chipped, scaled or peeled ofi by moisture. heat, wear or even the sharp blows of a hammer.

I usually prepare this composition, which 1 term an anticorrosive brush and trowel cement, in two shades, one brown and the other. bail. Although I do not restrict myself to these two shades, I preferthe same because well adapted for all the usual purposes for which the cementis designed.

For the production of the brown cement, the following materials are used, and in about the proportions named:

Red lead 20 parts. Monoxid of lead 25 White 1ead 25 Whiting L 18 Boiled linseed oil 2}. Venetian red 2% Japan drier 2 Spirits of turpentine 2 Lamp black .025 China clay 3 V To ma-ke'the bufi' cement, the following materials are compounded In mixing the above, the red lead, mo-

noirid of lead, white lead and linseed oil are placed together in an ordinary paint Application filed November 22, 1902i.

e t Patented N0v.-8, 1910.

Serial no. 529,435.

grinding machine, and .ground to a stifl paste. This mass is then put in a mill two hours. If. t e brown coating is the I one being produced, the Venetian red and lamp black are now added, followed by the operation, the whiting is next slowly added, and finally the China clay. After. this, the mill is run for anothertwo hours, making a total of four hours rinding".

For the buff coating, the French ellow ocher should be substituted in lieu of t e Venetian red and lamp-black, but the process is otherwise the same.

()f the above materials, the monoxid of lead should be unvitrified, and what known as "1nassicot, the whitin should be bolted the Venetian red shoult be of the bright grade; the French yellow oeher should be a dry powder; the lamp-black in oil, and the China clay in a fine powder.

affected by the other elements, and can be used with any of the others to form the cement. p

The China clayis employed because of its property of holding in solution the more weighty pigments, and to lighten the specific sential as the others, and may be substituted bysilica, gypsum, alumina, soapstone and a few other inert elements of like characteristics.

()ne advantageof the whiting used is that it-acts as a good filler, and is an absorbent of the oil, thereby rendering the surface of the coating somewhat dry so that successive coats of the cement will adhere one to the other in case several layers are desired, this whiting, as well as the China clay and other elements named in connection therewith, may be grou )ed uhder the general heading of inert earths.

In applying this cement to iron, any sur-' face rust is first removed. If the coating turpentine and the drier. With the mill in.

In place of the white lead, there may be 9-5 gravity of the whole; but it is not so esis put on with ordinary care, all rusting of the metal will absolute y cease. The reason why all rusting beneath tlns cement is prevented is because it keeps from the-metal all possible carbonic acid, hydrogen peroxid and other oxidizing elements, and further I I i t l excludes any clectrolytic action It is there- 1 fore impossible for the iron or other metal to be superficially afi'ected, no matter for how long a time the same is exposed to any oxidizing source, provided the coating remains intact. The cement being absolutely impervimis to moisture and ordinary acids,

. as'well as resistant to wear, there is no way in which the metal can be reached by water, or chemicals such as would be met with in usual structures.

So hard and resistant is this cement when fully hardened, that lltlIIllllLl'-l)l()\\'5 will not Ila-kc it off from the metal surface to which it. has been applied, and it is only by means of a hammer and cold-chisel that it can be removed.

\Vhen used for filling blow-holesand other cavities in cast; metal, this cement will hehave to the cutting or borii'ig tool practically like, the iron, steel or other metal itself. .i

In above formulae, .I. hate provided for but two shades or colors of the coating butthe same may be made in almost any other de sired shades. subject to the presence of the red lead and monoxid of lead, by-thc s'ubstitution of such coloring matters as are. necessary for the production thereof.

This cement; when it is to be used as a brush paint, should be thinned with pure spirits of turpentine to the proper consisteney. Whenever the cement is not to be used for a few days, it should be kept in a tightly closed receptacle and have its surface covercd with turpentine.

While it is proven that most remarkable etiects are obtained in the use of the coating wherein the unvitrified 'mono'xid of lead is employed as above set forth, yet I find that an unusually good coatingfor metals is produced when usual litharge of commerce is substituted therefor,provided the proportions of the ingredients are as stated;

'hat I claim as my invention and for which I desire Letters Patent is as follows,

to wit t. The within described cement composed of red lead twenty parts; monoxid-of lead twenty-live parts; white lead twenty-five parts; whitingcightecn parts; linseed oil two and one-half parts; Japan drier two parts; spirits of turpentine two parts, and (bin-a clay three parts.

2. The within described cement composedof red lead, unvitrified monoxid of lead, white lead and an inert earth in substantially equal proportions. and, small amounts of boiled linseed oil, Japan drier and spirits of'turpentine. i l

In testimony that I claim the foregoing invention, I have hereunto set my hand this 18 day of November, 1905 t-"ltl ll)l')]t.'l(,l{ l l)()l')(- l l.

Witnesses EDMUND J. FARR, Tnmms J. Hnwlrr.