US234482A - Alloy for coating metals - Google Patents

Description

llnrrnn STATES Parnnfrmnm JOHN B. JONES, OF BROOKLYN, ASSIGN OR OF ONE-HALFTO HENRY W. SHEPARD, OF SAME PLACE, AND ROBERT SEAMAN, OF NEW YORK,

ALLOY FOR COATING METALS.

SPECIFICATION forming part of Letters Patent No. 234,482, dated November 16, 1880.

Application filed August 17, 1880. (No specimens.)

To all whom it may concern:

Be it known that I, JOHN B. JONES, of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Alloy for Ooatin g Metals, of which the following specification is a description.

My invention consists in a compound metal or alloy composed of nickel, lead, tin, and pine, compounded for use'Ts a metal bath, into whmhg ncsllcmtssouother metal articles are to be immersed, and thereby coated, so as to prevent oxidation.

I will now proceed to describe the preparation of my compound alloy, and the proportions of nickel, tin, zinc, and lead to be used. I first melt in a large crucible from three to six ounces of nickel. Into this crucible I pour from three to six pounds of melted lead, and mix the two metals thoroughly. This melted mixture is then poured into a melting-pot containing from ninety-four to ninety-eight pounds of melted lead. Into this pot of nickel and lead I put about fifty to seventy-five pounds of zinc and mix thoroughly. Into this mixture I then melt and thoroughly mix about twenty-nine pounds of tin. This alloy thus made may be cast into ingots and be remelted as desired, or it may be at once poured into the metal tank or kettle, into which the articles to be coated are immersed in the usual manner until the desired coating is obtained.

After the nickel and lead are melted together it is better to introduce the zinc and then the tin in ingots near the bottom of the melted metal by dropping the pieces through a cylinder having its upper end above the edge of the pot and its lower end near the bottom of the pot. This mode of introducing the zinc and tin facilitates a more thorough mixture.

I11 coating metals by this invention I prefer to first subject them to the action of the acid and neutralizing baths for cleaning the metal and decomposing the injurious ferric salts, fully described in my application for Letters Patent filed April 3, 1880.

By my invention I am enabled to use a large quantity of lead in combination with the zinc, tin, and nickel, and yethave the alloy remain as electro-positive to the iron as zinc alone.

Metal coated by this invention (which I call calamining) is as well or better protected against oxidation, and its durability and tonacity are not injured to anything like the extent that occurs when coated with zinc alone, and the coating itself is more flexible. The metal bath of this alloy is efficient at a temperature 100 Fahrenheit lower than when zinc only is used as an alloy. Besides this, when zinc only is used, the hot melted zinc acts upon the iron in such a way as to dissolve from the iron a quantity of its surface, which, combining with a portion of the zinc, becomes a heavy infusible dross, chiefly consisting of iron and zinc, which falls to the bottom of the metal bath, and interferes with the proper action of the same. This dross requires to be removed as it is a source of great waste, and it is difficult to dispose of it at even less than half the original cost of the materials which compose it.

My improved alloy has a greater fluidity than zinc only, and an effective coating can be made with a smaller percentage of metal than with zinc, so that less weight is imparted to articles coated by it. Metals coated with this al- 10y will stand loiiig-continued exposure, even in an unfavorable climate, without any apparent oxidation, as I have frequently demonstrated by practical experiments.

What I claim as my invention, and desire to secure by Letters Patent, is

The alloy of nickel, lead, tin, and zinc, compounded substantially as herein set forth, and

for the purpose described.

JOHN B. JONES.

Witnesses:

D. D. OTIS, Jr., E. O. WEBB.