US2465987A - Composition and method for removing corrosion from zinc, zinc alloys, and zinc coated metals - Google Patents
Composition and method for removing corrosion from zinc, zinc alloys, and zinc coated metals Download PDFInfo
- Publication number
- US2465987A US2465987A US620843A US62084345A US2465987A US 2465987 A US2465987 A US 2465987A US 620843 A US620843 A US 620843A US 62084345 A US62084345 A US 62084345A US 2465987 A US2465987 A US 2465987A
- Authority
- US
- United States
- Prior art keywords
- zinc
- composition
- alloys
- corrosion
- coated metals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/10—Other heavy metals
Definitions
- This invention relates to the removal of rust and like corrosion reaction products from ferrous and other metals.
- One of the objects of this invention is to'provide a simple, practical, and efficient means for treating corrosion reaction products that appear on zinc coated ferrous metals as a result of oxidation or other corrosive actions and to substantially restore the surface of the metal or metals to a condition substantially free from such reaction products.
- Another object is to provide a method and means of the just-mentioned nature that will also contribute a passivating effect in at least the surface portions of the metal and thus enhance its capacity for resisting subsequent corrosion, particularly in the zinc coated ferrous metals.
- Another object is to provide a method and means for removing corrosion reaction products of the above-mentioned nature that will be capable of practical use in a simple and inexpensive manner and, where desired, without requiring elaborate or complex or costly apparatus or equipment.
- Another object is to provide a method and means of the above-mentioned nature that may be simply and emciently carried on both in small shops or establishments, illustratively such as use sheet metals as raw mate ials for conversion into various products where the need for such treatment may be principally intermittent, and in larger establishments where such need might be continuous.
- Another object is to provide a means of the above-mentioned nature that will entail little, if any, risk, such as the possibility of permanently injuring the corroded metal, and that will not require a high degree of skill in its control and application.
- Other objects will be in part obvious or in part pointed out hereinafter.
- the invention accordingly consists in the features of construction, combinations of elements, arrangements of parts, and in the several steps and relation and order of each of said steps to one or more of the others thereof, all as will be illustratively described herein, and the scope of the application of which will be indicated in the following claims.
- a very common corrosion reaction product is that found upon zinc or zinc alloys, and particularly on zinc-coated metals such as so-called galvanized iron.
- This corrosion reaction product is usually white or thereabouts in color.
- Such corroded products I treat by immersion in a bath which comprises two ounces by weight of tartaric acid, two ounces by weight of ammonium chloride, and 0.25 ounces by weight of mercuric chloride, per gallon of water, maintaining the bath preferably at a temperature of about F.
- the time period of immersion may vary according to the extent or depth or character of the zinc corrosion reaction product, and the immersion may be for as short a time as about one minute or for several hours, including more if the corrosion has extended to such an extent as to form in effect localized pits which form localized regions of corrosion reaction product of greater depth than elsewhere, and hence require a longer time to be acted upon or dissolved by the solution.
- Such a bath furthermore, does not attack the base metal and leaves it clear and clean, with an exceedingly light coating of mercury deposited or plated onto or covering the areas from which the corrosion reaction product has been removed by the treatment, if the concentration of the mercury ingredient of the solution is high enough or the time period of immersion long enough, or both.
- a coating of mercury deposit may be avoided entirely or made exceedingly thin (for example, hardly visible or just noticeably visible), or may be achieved in relatively substantial thickness though preferably not sufficiently so as to be relatively fluid on the surface of the metal.
- At least some degree of mercury coating is preferred, since it has the effect of giving the treated metal surface a reflective appearance or effect without which, apparently because of a slight production of a mercuric or mercurous reaction product at the surface of the metal, it has a matte or lusterless appearance which may be desirable for some purposes and not desirable for others. In the latter case, it can be avoided as above mentioned.
- a composition for removing corrosion reaction products from zinc, zinc alloys and zinc coated metals comprising by weight per gallon of water:
- the method of removing from zinc, zinc alloys and zinc coated materials the efiects of oxidation thereof which comprises immersing the metal in a bath comprising per gallon of water 2 ozs. by Weight of tartaric acid, 2 ozs. by weight of ammonium chloride, and 0.25 oz. by weight of mercuric chloride, While maintaining the bath at a temperature of about 150 F.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
Patented Apr. 5, 1949 COMPOSITION AND 1VIETHOD FOR REMOV- ING CORROSION FROM ZINC, ZINC AL- LOYS, AND ZINC COATED METALS Daniel A. Gorman, Sr., Ithaca, N. Y.
No Drawing. Application October 6, 1945, Serial No. 620,843
2 Claims. 1
This invention relates to the removal of rust and like corrosion reaction products from ferrous and other metals.
One of the objects of this invention is to'provide a simple, practical, and efficient means for treating corrosion reaction products that appear on zinc coated ferrous metals as a result of oxidation or other corrosive actions and to substantially restore the surface of the metal or metals to a condition substantially free from such reaction products. Another object is to provide a method and means of the just-mentioned nature that will also contribute a passivating effect in at least the surface portions of the metal and thus enhance its capacity for resisting subsequent corrosion, particularly in the zinc coated ferrous metals. Another object is to provide a method and means for removing corrosion reaction products of the above-mentioned nature that will be capable of practical use in a simple and inexpensive manner and, where desired, without requiring elaborate or complex or costly apparatus or equipment. Another object is to provide a method and means of the above-mentioned nature that may be simply and emciently carried on both in small shops or establishments, illustratively such as use sheet metals as raw mate ials for conversion into various products where the need for such treatment may be principally intermittent, and in larger establishments where such need might be continuous. Another object is to provide a means of the above-mentioned nature that will entail little, if any, risk, such as the possibility of permanently injuring the corroded metal, and that will not require a high degree of skill in its control and application. Other objects will be in part obvious or in part pointed out hereinafter.
The invention accordingly consists in the features of construction, combinations of elements, arrangements of parts, and in the several steps and relation and order of each of said steps to one or more of the others thereof, all as will be illustratively described herein, and the scope of the application of which will be indicated in the following claims.
A very common corrosion reaction product is that found upon zinc or zinc alloys, and particularly on zinc-coated metals such as so-called galvanized iron. This corrosion reaction product is usually white or thereabouts in color. Such corroded products I treat by immersion in a bath which comprises two ounces by weight of tartaric acid, two ounces by weight of ammonium chloride, and 0.25 ounces by weight of mercuric chloride, per gallon of water, maintaining the bath preferably at a temperature of about F. The time period of immersion may vary according to the extent or depth or character of the zinc corrosion reaction product, and the immersion may be for as short a time as about one minute or for several hours, including more if the corrosion has extended to such an extent as to form in effect localized pits which form localized regions of corrosion reaction product of greater depth than elsewhere, and hence require a longer time to be acted upon or dissolved by the solution. Such a bath, furthermore, does not attack the base metal and leaves it clear and clean, with an exceedingly light coating of mercury deposited or plated onto or covering the areas from which the corrosion reaction product has been removed by the treatment, if the concentration of the mercury ingredient of the solution is high enough or the time period of immersion long enough, or both. By appropriate variation of these latter factors, particularly in relation to the relative potentials or E. M. F.s of the metals, a coating of mercury deposit may be avoided entirely or made exceedingly thin (for example, hardly visible or just noticeably visible), or may be achieved in relatively substantial thickness though preferably not sufficiently so as to be relatively fluid on the surface of the metal. At least some degree of mercury coating is preferred, since it has the effect of giving the treated metal surface a reflective appearance or effect without which, apparently because of a slight production of a mercuric or mercurous reaction product at the surface of the metal, it has a matte or lusterless appearance which may be desirable for some purposes and not desirable for others. In the latter case, it can be avoided as above mentioned.
Upon removal from the bath, rinsing in plain water and drying in any suitable way suffice to complete the treatment, whence the metal piece or pieces, now freed and cleansed of the reaction products that comprise the zinc corrosion, may be put to use, coated, or shipped or stored.
It will thus be seen that there has been provided in this invention a means and method for removing corrosion reaction products, in which the various objects above noted, together with .many practical advantages, are successfully achieved. The compounds, in solution, are easy, simple, and safe to handle in contrast to strong acids or strongly acidic substances heretofore proposed to be used, and the method will be seen to be simple and capable of being carried on with a minimum of technical skill or supervision. The relative proportions above set forth will be understood to be preferred and illustrative of the best mode of carrying out my invention, are capable of some latitude of change or variation, all within the spirit and purposes of my invention.
As many possible embodiments may be made of the mechanical features of the above invention and as the art herein described might be varied in various parts, all without departing from the scope of the invention, it is to be understood that all matter herein above set forth is to be interpreted as illustrative and not in a limiting sense.
I claim:
1. A composition for removing corrosion reaction products from zinc, zinc alloys and zinc coated metals comprising by weight per gallon of water:
Ounces Tartaric acid 2 Ammonium chloride 2 Mercuric chloride 0.25
2. The method of removing from zinc, zinc alloys and zinc coated materials the efiects of oxidation thereof which comprises immersing the metal in a bath comprising per gallon of water 2 ozs. by Weight of tartaric acid, 2 ozs. by weight of ammonium chloride, and 0.25 oz. by weight of mercuric chloride, While maintaining the bath at a temperature of about 150 F.
DANIEL A. GORMAN, SR.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US620843A US2465987A (en) | 1945-10-06 | 1945-10-06 | Composition and method for removing corrosion from zinc, zinc alloys, and zinc coated metals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US620843A US2465987A (en) | 1945-10-06 | 1945-10-06 | Composition and method for removing corrosion from zinc, zinc alloys, and zinc coated metals |
Publications (1)
Publication Number | Publication Date |
---|---|
US2465987A true US2465987A (en) | 1949-04-05 |
Family
ID=24487640
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US620843A Expired - Lifetime US2465987A (en) | 1945-10-06 | 1945-10-06 | Composition and method for removing corrosion from zinc, zinc alloys, and zinc coated metals |
Country Status (1)
Country | Link |
---|---|
US (1) | US2465987A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2854367A (en) * | 1954-08-19 | 1958-09-30 | Second Bank State Street Trust | Composition and method for producing protective coatings |
US2977318A (en) * | 1956-06-20 | 1961-03-28 | Hagan Chemicals & Controls Inc | Substituted amide inhibited acid compositions |
US2982702A (en) * | 1950-05-09 | 1961-05-02 | Ralph F Wehrmann | Pretreating uranium for metal plating |
US2994664A (en) * | 1958-02-19 | 1961-08-01 | Nalco Chemical Co | Dry acid cleaning compositions |
US3003967A (en) * | 1959-09-23 | 1961-10-10 | Kearfott Company Inc | Method for increasing the effective permeability of manganese ferrites |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB163534A (en) * | 1920-03-15 | 1921-05-26 | Francis Grimshaw Martin | Improvements in liquid substances for removing oil, grease and the like from surfaces |
US1890214A (en) * | 1929-05-18 | 1932-12-06 | Aluminum Co Of America | Cleaning composition |
US2102925A (en) * | 1936-08-05 | 1937-12-21 | Sears Roebuck & Co | Metal coloring |
US2303398A (en) * | 1939-05-01 | 1942-12-01 | Hall Lab Inc | Alkaline detergent |
US2326837A (en) * | 1940-01-13 | 1943-08-17 | Nat Carbon Co Inc | Cleaning composition and method for its use |
-
1945
- 1945-10-06 US US620843A patent/US2465987A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB163534A (en) * | 1920-03-15 | 1921-05-26 | Francis Grimshaw Martin | Improvements in liquid substances for removing oil, grease and the like from surfaces |
US1890214A (en) * | 1929-05-18 | 1932-12-06 | Aluminum Co Of America | Cleaning composition |
US2102925A (en) * | 1936-08-05 | 1937-12-21 | Sears Roebuck & Co | Metal coloring |
US2303398A (en) * | 1939-05-01 | 1942-12-01 | Hall Lab Inc | Alkaline detergent |
US2326837A (en) * | 1940-01-13 | 1943-08-17 | Nat Carbon Co Inc | Cleaning composition and method for its use |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2982702A (en) * | 1950-05-09 | 1961-05-02 | Ralph F Wehrmann | Pretreating uranium for metal plating |
US2854367A (en) * | 1954-08-19 | 1958-09-30 | Second Bank State Street Trust | Composition and method for producing protective coatings |
US2977318A (en) * | 1956-06-20 | 1961-03-28 | Hagan Chemicals & Controls Inc | Substituted amide inhibited acid compositions |
US2994664A (en) * | 1958-02-19 | 1961-08-01 | Nalco Chemical Co | Dry acid cleaning compositions |
US3003967A (en) * | 1959-09-23 | 1961-10-10 | Kearfott Company Inc | Method for increasing the effective permeability of manganese ferrites |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3573984A (en) | Alkaline desmutting composition for ferrous metals | |
US2465987A (en) | Composition and method for removing corrosion from zinc, zinc alloys, and zinc coated metals | |
JPS6045274B2 (en) | Compositions and methods for chemical stripping of metal deposits | |
US3860434A (en) | Alloyed steel treatment with protein containing composition | |
US3489625A (en) | Process for metal surface conditioning | |
US1279331A (en) | Pickling iron and steel. | |
US2145827A (en) | Materials for and methods of treating metallic articles | |
US2342738A (en) | Corrosion resistant coating for metal surfaces | |
US2218557A (en) | Treatment of metals | |
US2060365A (en) | Oxalate coating on nonferrous metal | |
US2537035A (en) | Method of coating stainless steel | |
US2473456A (en) | Passivation of ferrous metals | |
US2353019A (en) | Method of etching steel | |
US2209291A (en) | Rust removing composition | |
US1279101A (en) | Method of preparing pickled iron and steel for painting. | |
US1459910A (en) | Method of removing rust from metal articles | |
US3161598A (en) | Method and composition for chemical rust removal | |
US2527828A (en) | Method of coating zinc base alloys | |
US2104667A (en) | Treatment of rustless iron | |
GB634599A (en) | Improvements relating to the casting of aluminium on articles or parts made of ferrous metals, or on surfaces of such metals | |
US2913360A (en) | Method of descaling nickel alloys | |
US2449495A (en) | Application of phosphate protective coatings to nonferrous metals | |
US2394065A (en) | Protective coatings for nonferrous metals | |
FR2363640A1 (en) | SURFACE TREATMENT OF ZINC OR ZINC ALLOYS | |
US2277664A (en) | Zinc plating ferrous articles |