US1493012A - Rustproofing process and compound - Google Patents

Description

re wwe 1 j.

UNITED sures PATENT- orries.

E. ABRAHAM, F DETROIT, MICHIGAN.

BUSIPEOOFING PROCESS AND COMYOUND.

Ho Drawing. Original application filed Kay 10, 1917, Serial li'o. 167,857. Divided and this application filed January 18, 1918, Serial No. 212,409. Renewed April 8, 1923. v

To all whom it may comm:

Be it known that I, Cmmms E. ABRAHAM, a citizen of-the United States of America, residing at Detroit, in the county of Wayne 5 and State of Michigan, have invented certain new and useful Improvements in Rustproofing Processes and Compounds, of which the following is a specification.

This invention relates to a rust-proofing process and formula and refers more particularly to a process and formula which will effectively produce or cause to be produced on ferrous metals or their alloys a protective rust-resisting film or coatin I Among the objects of the invention are to provide an improved process and formula whereby the ferrous metals or their alloys can be efiiciently and economically rustproofed; to provide a compound and process which will be more effective for rust-proof ing purposes than those now in use and whic will permit the rust-proofing without 'bu'fling or otherwise treating the metal before applyin the formula; and in a general to provi e a new and improved processand formula of the character above referred to.

I While the invention in its broader aspects is not limited to the articular substances or proportions specific except as ultimately set forth in the claims, I have found that a compound formed and applied as follows is particularly effective in' rust-proofing iron, steel or the like; these ingredients being 86 used in substantially the fo owing proportions:

Barium nitrate 18 oz. Zinc oxide 9 oz. o Antimony trioxide 7 oz.

Oxalic acid 4 oz. Phosphoric acid 5 oz. Water 40gal.

The above solution is heated to the boiling point and maintained at this tem rature while the articleto be rustroof is subjected to the action of this ath from a proximately 40 minutes to two and one-h f hours; according to the. hardness of the metal to be treated.

In general the process is one in which zinc oxide,wantimony trioxide, barium nitrate, oxalic acid and phosphoric acid are mixed with water in substantially such quantity and proportions as shown in the above forcompounds in place of zinc oxide; or manganese or strontium nitrates in lace of barium nitrate; or phosphoric aci in place of oxalic acid in the presence of antimony, oxide of antimony or other compounds of antimony will produce a similar rust-protective coat to ferrous metalswhen treated as outlined. Also the proportions and quantities of the several materials-may be v ar1ed within practical limits and in this way a coating of different shades of color and of density may be obtained, but with substantially thesame rust-resisting 'pr'o erties.. However, the formula substantially as given aboiie I have found has produced very good resu ts.

Therefore, I believe I am the first to employ for the rust-proofing of ferrous metals .ing the following substances: Barium nitrate, zinc oxide, antimony trioxide, oxalic ac 4d,:pll11osphoric acid, water.

, 95 e process of rust-proofing articles of bmri nitmtii zinc one,

-mony and a normal auto y,= a relatively or phhoric mi and normally mst in:

' 7. A rust-@poofing composition cont 2 11;:- mtony and a normally rust which copr oxide, oxalic aci waiter;

which comprises subjecting them to an mm unified bath containin aco mdi ofi $iy m pg 00m pad and the heming mi ndl Eaafilm