US2578725A - Process of protecting metals against corrosion - Google Patents
Process of protecting metals against corrosion Download PDFInfo
- Publication number
- US2578725A US2578725A US122591A US12259149A US2578725A US 2578725 A US2578725 A US 2578725A US 122591 A US122591 A US 122591A US 12259149 A US12259149 A US 12259149A US 2578725 A US2578725 A US 2578725A
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- Prior art keywords
- corrosion
- water
- solution
- iron
- against corrosion
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- Expired - Lifetime
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- 238000005260 corrosion Methods 0.000 title claims description 18
- 230000007797 corrosion Effects 0.000 title claims description 18
- 229910052751 metal Inorganic materials 0.000 title claims description 9
- 239000002184 metal Substances 0.000 title claims description 9
- 238000000034 method Methods 0.000 title claims description 8
- 150000002739 metals Chemical class 0.000 title claims description 7
- 239000000203 mixture Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 150000001875 compounds Chemical class 0.000 claims description 10
- 150000002576 ketones Chemical class 0.000 claims description 7
- 150000001298 alcohols Chemical class 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 24
- 229910052742 iron Inorganic materials 0.000 description 12
- 239000007788 liquid Substances 0.000 description 11
- 239000003112 inhibitor Substances 0.000 description 9
- 238000007792 addition Methods 0.000 description 6
- -1 aliphatic radical Chemical group 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- CBHCDHNUZWWAPP-UHFFFAOYSA-N pecazine Chemical compound C1N(C)CCCC1CN1C2=CC=CC=C2SC2=CC=CC=C21 CBHCDHNUZWWAPP-UHFFFAOYSA-N 0.000 description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 208000024891 symptom Diseases 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical group 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 235000013980 iron oxide Nutrition 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- OVARTBFNCCXQKS-UHFFFAOYSA-N propan-2-one;hydrate Chemical compound O.CC(C)=O OVARTBFNCCXQKS-UHFFFAOYSA-N 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229930195734 saturated hydrocarbon Natural products 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 150000005840 aryl radicals Chemical class 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- OQRLVNFTCUZFSJ-UHFFFAOYSA-N benzene-1,2-diol;iron Chemical compound [Fe].OC1=CC=CC=C1O OQRLVNFTCUZFSJ-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- XDMMMGGRRNTWML-UHFFFAOYSA-N cyclohexylazanium;acetate Chemical compound CC(O)=O.NC1CCCCC1 XDMMMGGRRNTWML-UHFFFAOYSA-N 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- AEDZKIACDBYJLQ-UHFFFAOYSA-N ethane-1,2-diol;hydrate Chemical compound O.OCCO AEDZKIACDBYJLQ-UHFFFAOYSA-N 0.000 description 1
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- GBMDVOWEEQVZKZ-UHFFFAOYSA-N methanol;hydrate Chemical compound O.OC GBMDVOWEEQVZKZ-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical compound C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- KSSNXJHPEFVKHY-UHFFFAOYSA-N phenol;hydrate Chemical compound O.OC1=CC=CC=C1 KSSNXJHPEFVKHY-UHFFFAOYSA-N 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002760 rocket fuel Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 108010080511 serum sodium transport inhibitor Proteins 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/16—Sulfur-containing compounds
- C23F11/164—Sulfur-containing compounds containing a -SO2-N group
Definitions
- Such liquids are used, for example, as fuels for guided missiles. as anti-freezing liquids in radiators. as cooling liquids in deep freezing units and as pressure transfer medium in hydraulic systems.
- Mepasin in this connection, refers to a mixture of saturated hydrocarbons with a chain length between 12 and 18 carbon atoms amended April 30. 1928; 370 O. G. 757) 2 which was originated by the Fischer-Tropsch synthesis. The same effect can be obtained by using, instead of Mepasin, the fraction of oil or gasoline of a corresponding chain length.
- R1 is a saturated hydrocarbon radical having a chain length of from 12 to 20 carbon atoms inclusive
- R2 is an aliphatic radical of the formula -C11H2n, n being a whole number), for example, -CH2, -C2H4, -C3Hs-, or an aryl or aromatic radical. for example, -CeH4
- R3 is a hydrogen atom, an alkali metal atom. an ammonium or substituted ammonium radical or other positive radical of a salt.
- the said compounds of the type defined should be either soluble in, or give emulsions with, the alcohols or ketones, or their mixtures with water, to whth they are added for inhibiting or preventing corrosion. Compounds of the type defined above and their preparation are described in U. S. Patent No. 2,225,960, granted December 24, 1940.
- the amount necessary for preventing any corrosion varies with the special conditions but does not necessarily exceed 1%. Generally, even 0.05 to 0.5% of the compounds in question will be sufficient to give results that guarantee corrosion-proof storage, transportation and handling in rockets. radiators, deep-cooling and hydraulic systems.
- Example 1 Ordinary iron strips, welded, 5 x 2.5 x 0.1 inches, were placed in closed containers at ambient temperature. These containers were then filled about one-half full with a mixture of 300 ccm. of methanol and com. of distilled water. The pH-value of this solution was 6. To one of the containers, an addition was made of 0.05% of the inhibitor, "Mepasin-sulfamido-aceticacid-sodium salt. After one day, corrosion took place on the iron strip in the pure mixture in the form of points and dots. Increasing more and more with the lapse of time, the corrosion turned badly on this plate. After the same time, the iron strip in the liquid containing the addition of a trace of the inhibitor, 0.05% Mepasinsulfamido-acetic-acid-sodium salt, still has the same appearance as it had at the beginning of the test.
- the inhibitor "Mepasin-sulfamido-aceticacid-sodium salt
- Example 2 Ordinary iron strips, welded, x 2.5 x 0.1 inches, were tested in the same way as described in Example 1. A mixture, however, of 300 com. ethanol and 100 ccm. of distilled water containing 1% sodium chloride was used. The pH-value of this mixture was found to be '7. After a few hours, distinct corrosion symptoms appeared on the iron strip in the pure solution and after four days the appearance of the test sample indicated heavy corrosion symptoms on the entire surface of the sheet; the liquids showed a large amount of iron oxide scale.
- Example 3 Welded strips of magnesium alloy (6.5% A1, 1.0% Zn, 0.2% Mn, base Mg) 5 X 2.5 x 0.1 inches, were tested in a 50% ethylene-glycol-water solution; pH-value, 7.5. One of the containers was filled with the pure solution, to the other one 0.5% inhibitor, Mepasin" sulfamido aceticacid-cyclo-hexylamin salt was added. After a few days, heavy corrosion symptoms appeared on the light metal strip in the inhibitor-free solution, while the magnesium-alloy'strip in the anti-corrosive 50% glycol had changed none from its original appearance. The corrosion in the pure solution progressed with the lapse of time; the situation in the 50% glycol containing the inhibitorremained the same as it was at the beginning of the test.
- Example 4 Using the same test method as mentioned under Examples 1 and 2, but filling the containers with an 8% solution of phenol in water. The addition of 0.5% of the inhibitor Mepasinsulfamido-acetic-acid-sodium salt to one of the containers resulted in the prevention of any corrosion on the iron strip in this solution. In comparison, the iron strip in the phenol-solution, without inhibitor, showed remarkable rust after one day, especially on the interphase between liquid and atmosphere.
- Example 5 In the same test method, a acetonewater mixture caused heavy corrosion on iron strips after a very few days. The same solution did not seem to influence the surface of the iron strips when containing 0.5% of the inhibitor mentioned in Example 4.
- Example 6 A simple color reaction shows the protective action of the "Mepasin"-sulfamido-acetic-acidsodium salt in a water-alcohol solution on iron surfaces. After putting iron strips in a 40% so lution of pyrocatechin in water, immediately the known di-hydroxy benzene-iron complex appears, indicated by a deep violet color of the solution. With the lapse of time, the solution contains a large scale of violet residue. If the same test is carried out with a 40% solution of pyrocatechin in water containing an addition of 0.5% of the inhibitor in question, the forming of the violet complex compound is greatly delayed and, over the same period of time, only a small portion of the violet scale is to be seen.
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- 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 Dec. 18, 1951 PROCESS OF PROTECTING METALS AGAINST CORROSION Josef M. Michel and Karl F. Hager, Fort Bliss, Tex., assignors to the United States of America as represented by the Secretary of the Army No Drawing. Application October 20. 1949, Serial No. 122,591
4 Claims.
V (Granted under the act of March 3, 1883, as
The invention described herein may be manuiactured and used by or for the Government for governmental purposes without the payment of any royalty thereon.
It is very well known that alcohols, ketones and their mixtures with water, such as methanol-water. ethanol-water, methanol-ethanolwater, acetone-water, glycol-water, phenolwater, sugar-water, etc., are corrosive to metals, especially iron. when stored for any length of time.
Such liquids are used, for example, as fuels for guided missiles. as anti-freezing liquids in radiators. as cooling liquids in deep freezing units and as pressure transfer medium in hydraulic systems.
Formation of iron oxides takes place as a result of such corrosive action, appearing in a muddy precipitate. sometimes in a more or less colloidal form. When usin such contaminated fuels or liquids, difficulties may arise in the piping system occurring separately in the valves. pumps r nozzles, which lowers or disturbs the supply of the liquid in the cooling systems or varies the efiiciency of the combustion and the thrust of a rocket.
Many proposals have been made to overcome these difficulties. for example, the addition of inorganic compounds such as chromates, silicates. phosphates and nitrites to act as inhibitor. The results have been considered good but the solubility, which is dependent upon the alcohol. ketone, mixin ratio and temperature, and the chemical reactions. such as the reduction of the six-valent Cr-ion to trivalent inactive com pounds, show that such additions cannot be expected to be dependable.
In contrast to these proposals,,it was found that a certain group of metal-active organic compounds, the Mepasin-sulfamido-(aliphatic or aromatic)-carboxylicacids or their salts, which are either soluble in alcohol, ketone and their water mixtures or give emulsions with them, are able to prevent all corrosion. The protection is entirely independent of the fuel or liquid, even when the pH-value does not correspond to the neutral point (solutions with a DH- value below 7) or when sea-water is used as diluting agent with the alcohol or ketone water mixture, or of the metals and alloys to be used. This means that the protection is the same for heavy and light metals such as magnesium alloys. Mepasin, in this connection, refers to a mixture of saturated hydrocarbons with a chain length between 12 and 18 carbon atoms amended April 30. 1928; 370 O. G. 757) 2 which was originated by the Fischer-Tropsch synthesis. The same effect can be obtained by using, instead of Mepasin, the fraction of oil or gasoline of a corresponding chain length.
The compounds which are utilizable as corrosion inhibitin or corrosion preventing agents according to the present invention have the following general formula,
in which R1 is a saturated hydrocarbon radical having a chain length of from 12 to 20 carbon atoms inclusive; R2 is an aliphatic radical of the formula -C11H2n, n being a whole number), for example, -CH2, -C2H4, -C3Hs-, or an aryl or aromatic radical. for example, -CeH4; and R3 is a hydrogen atom, an alkali metal atom. an ammonium or substituted ammonium radical or other positive radical of a salt. The said compounds of the type defined should be either soluble in, or give emulsions with, the alcohols or ketones, or their mixtures with water, to whth they are added for inhibiting or preventing corrosion. Compounds of the type defined above and their preparation are described in U. S. Patent No. 2,225,960, granted December 24, 1940.
The amount necessary for preventing any corrosion varies with the special conditions but does not necessarily exceed 1%. Generally, even 0.05 to 0.5% of the compounds in question will be sufficient to give results that guarantee corrosion-proof storage, transportation and handling in rockets. radiators, deep-cooling and hydraulic systems.
Other advantages are seen in the fact that those compounds are mostly of organic nature; for example as a rocket fuel, they will not infiuence or diminish the efiiciency of the rocket motor;. as a liquid in radiator systems, the hazard of generating inorganic salt-scale will be avoided; as inhibitor in anti-freezing liquids, they prevent every kind of hard scale for they act, in addition to preventing corrosion, as emulsifying agents.
Experiments have been carried out and the methods and results are given in the examples below:
Example 1 Ordinary iron strips, welded, 5 x 2.5 x 0.1 inches, were placed in closed containers at ambient temperature. These containers were then filled about one-half full with a mixture of 300 ccm. of methanol and com. of distilled water. The pH-value of this solution was 6. To one of the containers, an addition was made of 0.05% of the inhibitor, "Mepasin-sulfamido-aceticacid-sodium salt. After one day, corrosion took place on the iron strip in the pure mixture in the form of points and dots. Increasing more and more with the lapse of time, the corrosion turned badly on this plate. After the same time, the iron strip in the liquid containing the addition of a trace of the inhibitor, 0.05% Mepasinsulfamido-acetic-acid-sodium salt, still has the same appearance as it had at the beginning of the test.
Example 2 Ordinary iron strips, welded, x 2.5 x 0.1 inches, were tested in the same way as described in Example 1. A mixture, however, of 300 com. ethanol and 100 ccm. of distilled water containing 1% sodium chloride was used. The pH-value of this mixture was found to be '7. After a few hours, distinct corrosion symptoms appeared on the iron strip in the pure solution and after four days the appearance of the test sample indicated heavy corrosion symptoms on the entire surface of the sheet; the liquids showed a large amount of iron oxide scale. In contrast, the strip in the mixture of the same composition, but containing 0.6% Mepasin"-sulfamido-butyric-acid-ammonium salt was entirely unchanged which is a much more important evidence for the high efficiency of this type of metal-active compound.
Example 3 Welded strips of magnesium alloy (6.5% A1, 1.0% Zn, 0.2% Mn, base Mg) 5 X 2.5 x 0.1 inches, were tested in a 50% ethylene-glycol-water solution; pH-value, 7.5. One of the containers was filled with the pure solution, to the other one 0.5% inhibitor, Mepasin" sulfamido aceticacid-cyclo-hexylamin salt was added. After a few days, heavy corrosion symptoms appeared on the light metal strip in the inhibitor-free solution, while the magnesium-alloy'strip in the anti-corrosive 50% glycol had changed none from its original appearance. The corrosion in the pure solution progressed with the lapse of time; the situation in the 50% glycol containing the inhibitorremained the same as it was at the beginning of the test.
Example 4 Using the same test method as mentioned under Examples 1 and 2, but filling the containers with an 8% solution of phenol in water. The addition of 0.5% of the inhibitor Mepasinsulfamido-acetic-acid-sodium salt to one of the containers resulted in the prevention of any corrosion on the iron strip in this solution. In comparison, the iron strip in the phenol-solution, without inhibitor, showed remarkable rust after one day, especially on the interphase between liquid and atmosphere.
Example 5 In the same test method, a acetonewater mixture caused heavy corrosion on iron strips after a very few days. The same solution did not seem to influence the surface of the iron strips when containing 0.5% of the inhibitor mentioned in Example 4.
Example 6 A simple color reaction shows the protective action of the "Mepasin"-sulfamido-acetic-acidsodium salt in a water-alcohol solution on iron surfaces. After putting iron strips in a 40% so lution of pyrocatechin in water, immediately the known di-hydroxy benzene-iron complex appears, indicated by a deep violet color of the solution. With the lapse of time, the solution contains a large scale of violet residue. If the same test is carried out with a 40% solution of pyrocatechin in water containing an addition of 0.5% of the inhibitor in question, the forming of the violet complex compound is greatly delayed and, over the same period of time, only a small portion of the violet scale is to be seen.
We claim:
1. The process of protecting metals against corrosion from contact with a material selected from the group consisting of alcohols, ketones and water mixtures thereof which comprises effecting said contact in the presence of a compound having the formula in which R1 is a saturated aliphatic hydrocarbon with a chain length of from 12 to 20 atoms, R2 is a member of the group consisting of aryl radicals and alkylene radicals of the formula C1. H2n-- where n is a small positive integer and R3 is a member of the group consisting of hydrogen, alkali metal and ammonium ions and substituted ammonium radicals, said compound forming a dispersion in said material.
2. The process of claim 1 in which the dispersion formed is a true solution.
3. The process of claim 1 in which the dispersion formed is colloidal.
4. The process of claim 1 in which the metal protected is magnesium.
JOSEF M. MICHEL. KARL F. HAGER.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,797,401 Calcott et al. Mar. 24, 1931 1,810,946 Calcott et al June 23, 1931 2,225,960 Orthner et al Dec. 24, 1940
Claims (1)
1. THE PROCESS OF PROTECTING METALS AGAINST CORROSION FROM CONTACT WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS, KETONES AND WATER MIXTURES THEREOF WHICH COMPRISES EFFECTING SAID CONTACT IN THE PRESENCE OF A COMPOUND HAVING THE FORMULA
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US122591A US2578725A (en) | 1949-10-20 | 1949-10-20 | Process of protecting metals against corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US122591A US2578725A (en) | 1949-10-20 | 1949-10-20 | Process of protecting metals against corrosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2578725A true US2578725A (en) | 1951-12-18 |
Family
ID=22403604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US122591A Expired - Lifetime US2578725A (en) | 1949-10-20 | 1949-10-20 | Process of protecting metals against corrosion |
Country Status (1)
| Country | Link |
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| US (1) | US2578725A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2680066A (en) * | 1949-10-20 | 1954-06-01 | Us Army | Process of stabilizing hydrazine and hydrazine hydrate and mixtures of either of them with alcohols or water |
| US2704264A (en) * | 1951-07-16 | 1955-03-15 | Josef M Michel | Process of protecting surfaces of metals against corrosion |
| US2801979A (en) * | 1954-09-01 | 1957-08-06 | Karl F Hager | Inhibitor in acid pickling |
| US2869995A (en) * | 1950-07-18 | 1959-01-20 | Josef M Michel | Stabilization of fuels containing tetraethyl lead |
| US2889372A (en) * | 1959-06-02 | Certificate of correction | ||
| US2908648A (en) * | 1954-10-21 | 1959-10-13 | Geigy Chem Corp | Corrosion-inhibited compositions containing n-(alkylarylsulfonyl) amino acids and salts thereof |
| DE1122194B (en) * | 1954-10-27 | 1962-01-18 | Continental Oil Co | Bituminous, elastic primer to be applied to metal surfaces by cold dipping |
| US3027405A (en) * | 1959-07-29 | 1962-03-27 | Geigy Chem Corp | Nu-(alkylarylsulfonyl)-amino acids and salts thereof |
| US3291645A (en) * | 1964-09-10 | 1966-12-13 | Allied Chem | Corrosion inhibitor in dry cell battery |
| DE2943963A1 (en) * | 1979-10-31 | 1981-05-14 | Basf Ag, 6700 Ludwigshafen | Iron corrosion inhibition - with aq. system contg. alkanolamine salt(s) of alkenyl succinic acid(s) |
| US4344862A (en) * | 1979-11-24 | 1982-08-17 | Basf Aktiengesellschaft | Reaction products of sulfonamido-carboxylic acids or carboxamido-carboxylic acids with alkanolamines, and their use as low-foaming corrosion inhibitors |
| US4999134A (en) * | 1987-09-25 | 1991-03-12 | Basf Aktiengesellschaft | Zinc salts, lead salts and/or calcium salts of carboxylic acids and their use as corrosion inhibitors |
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| US1797401A (en) * | 1931-03-24 | And herbert w | ||
| US1810946A (en) * | 1929-09-07 | 1931-06-23 | Du Pont | Noncorrosive solutions |
| US2225960A (en) * | 1939-01-27 | 1940-12-24 | Gen Aniline & Film Corp | Condensation products and a process of preparing them |
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1949
- 1949-10-20 US US122591A patent/US2578725A/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1797401A (en) * | 1931-03-24 | And herbert w | ||
| US1810946A (en) * | 1929-09-07 | 1931-06-23 | Du Pont | Noncorrosive solutions |
| US2225960A (en) * | 1939-01-27 | 1940-12-24 | Gen Aniline & Film Corp | Condensation products and a process of preparing them |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2889372A (en) * | 1959-06-02 | Certificate of correction | ||
| US2680066A (en) * | 1949-10-20 | 1954-06-01 | Us Army | Process of stabilizing hydrazine and hydrazine hydrate and mixtures of either of them with alcohols or water |
| US2869995A (en) * | 1950-07-18 | 1959-01-20 | Josef M Michel | Stabilization of fuels containing tetraethyl lead |
| US2704264A (en) * | 1951-07-16 | 1955-03-15 | Josef M Michel | Process of protecting surfaces of metals against corrosion |
| US2801979A (en) * | 1954-09-01 | 1957-08-06 | Karl F Hager | Inhibitor in acid pickling |
| US2908648A (en) * | 1954-10-21 | 1959-10-13 | Geigy Chem Corp | Corrosion-inhibited compositions containing n-(alkylarylsulfonyl) amino acids and salts thereof |
| DE1122194B (en) * | 1954-10-27 | 1962-01-18 | Continental Oil Co | Bituminous, elastic primer to be applied to metal surfaces by cold dipping |
| US3027405A (en) * | 1959-07-29 | 1962-03-27 | Geigy Chem Corp | Nu-(alkylarylsulfonyl)-amino acids and salts thereof |
| US3291645A (en) * | 1964-09-10 | 1966-12-13 | Allied Chem | Corrosion inhibitor in dry cell battery |
| DE2943963A1 (en) * | 1979-10-31 | 1981-05-14 | Basf Ag, 6700 Ludwigshafen | Iron corrosion inhibition - with aq. system contg. alkanolamine salt(s) of alkenyl succinic acid(s) |
| US4344862A (en) * | 1979-11-24 | 1982-08-17 | Basf Aktiengesellschaft | Reaction products of sulfonamido-carboxylic acids or carboxamido-carboxylic acids with alkanolamines, and their use as low-foaming corrosion inhibitors |
| US4999134A (en) * | 1987-09-25 | 1991-03-12 | Basf Aktiengesellschaft | Zinc salts, lead salts and/or calcium salts of carboxylic acids and their use as corrosion inhibitors |
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