US2878296A - Corrosion inhibited fluids - Google Patents
Corrosion inhibited fluids Download PDFInfo
- Publication number
- US2878296A US2878296A US626281A US62628156A US2878296A US 2878296 A US2878296 A US 2878296A US 626281 A US626281 A US 626281A US 62628156 A US62628156 A US 62628156A US 2878296 A US2878296 A US 2878296A
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- Prior art keywords
- acids
- coal
- weight
- ester
- average
- 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
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- 239000012530 fluid Substances 0.000 title claims description 15
- 230000007797 corrosion Effects 0.000 title description 4
- 238000005260 corrosion Methods 0.000 title description 4
- 239000002253 acid Substances 0.000 claims description 27
- 150000007513 acids Chemical class 0.000 claims description 26
- 239000003245 coal Substances 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 10
- 150000008282 halocarbons Chemical class 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 239000003575 carbonaceous material Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 150000002148 esters Chemical class 0.000 description 16
- 125000005907 alkyl ester group Chemical group 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- -1 isooctyl Chemical group 0.000 description 5
- PMZBEWNVCRFWHO-UHFFFAOYSA-N 1,1,1,4,4,4-hexachloro-2,2,3,3-tetrafluorobutane Chemical compound ClC(Cl)(Cl)C(F)(F)C(F)(F)C(Cl)(Cl)Cl PMZBEWNVCRFWHO-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- QPUYECUOLPXSFR-UHFFFAOYSA-N 1-methylnaphthalene Chemical compound C1=CC=C2C(C)=CC=CC2=C1 QPUYECUOLPXSFR-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000009972 noncorrosive effect Effects 0.000 description 2
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- NUMXHEUHHRTBQT-AATRIKPKSA-N 2,4-dimethoxy-1-[(e)-2-nitroethenyl]benzene Chemical compound COC1=CC=C(\C=C\[N+]([O-])=O)C(OC)=C1 NUMXHEUHHRTBQT-AATRIKPKSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 125000001117 oleyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([H])\C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 125000006158 tetracarboxylic acid group Chemical group 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
- C23F11/12—Oxygen-containing compounds
- C23F11/128—Esters of carboxylic acids
Definitions
- coal acids that are employed to prepare the esters utilized in the present invention may be identical with Dow chemical Company, Midland Mich a carport 5 or similar to those which may be obtained in a known mm of Delaware manner bythe oxidation with gaseous oxygen of an aqueous alkaline slurry of a finely divided carbonaceous N0 Dl'aWlhg- Application December 5, 1956 material selected from the group consisting of coal and Serial No. 626,281 coke that has been obtained by the carbonization of coal at temperatures beneath about 700 C. Coal acids that 7 Claims. (Cl.
- P P able carbonaceous materials are also generally satisfacjective the provision of certain media comprised of base tory fluids consisting of halogenated hydrocarbons that are
- the f coal aeids are hygroscopic, usually ll i not corrosive -va metal Surfaces, Particularly iron essentially water-soluble material. They are believed and Steel Surfaces, and Which are especially "tile t to be comprised substantially of various aromatic polyemploymeht as hydraulic fluids, as Coolants in metal carboxylic acids in a mixture having an average molecheat-exchanging Systems and for ike purposesular weight in the neighborhood of 250.
- a non-cerrodent equivalent weight is generally about eighty.
- They ordimedium is COl'IlPI'lSfld Of a base fluid 0f the indicated type narily appear to have an average of two and one-half containing a minor proportion of a miscible alkyl ester to five carboxylic groups per molecule with an apparent of coal acids in which the alkyl radical contains less than average f th t four being common.
- the greatly preponderant proportion of arothe y ester of cDal acids based on the Weight f the matic nuclei obtained in the conventionally manufactured noll-eoll'odent meflillmy P p it y e coal acids may be found to consist of methylnaphthalene, more advantageous to p y from t0 2 Percent y benzene, biphenyl, naphthalene, phenanthrene, alkyl benweight of the alkyl ester of coal acids in the medium. zene, benzophenone and toluene nuclei.
- alkyl ester of coal acids It is desirable for the alkyl ester of coal acids that is To alford additional delineation, several alkyl esters p y to he a completely of ntially compl t ly of coal acids were tested for their efiicacy in inhibiting the esterlfied p such an ester y be ed r adily corrosiveness upon metals of hexachlorotetrafluorobutane.
- Typical of the esters which of an inch, of Formula 52-100 cold rolled steel, wrapped may advantageously be utilized in the practice of the crosswise with seven turns and lengthwise with one turn invention are the isooctyl; 2-ethyl-n-hexyl; decyl; lauryl; of No. 19 copper wire, was inserted in each of the contridecyl and oleyl esters of coal acids and the like as well tainers. The containers were then tightly sealed and as their mixtures.
- the base fluids that may be rendered about 200 F.
- the non-corrosive by the alkyl esters of coal acids consist of copper and steel specimens from each of the bottles were liquid halogenated hydrocarbons, including fluorinated, examined closely for evidences of corrosion and the steel chlorinated, brominated and mixed-halogenated derivastrip checked for possible weight loss.
- Pracrosion-inhibited fluids were analyzed for possible changes tice of the invention is exceptionally advantageous with in their viscosity and increases in acidity.
- chlorofluorocarbons such as hexachlorotetrafluorowhich were obtained in each of the tests that was butane (C Cl F and the like which are exceptionally conducted are set forth in the following tabulation which useful as hydraulic fluids (as, for example, in the hy also includes certain of the physical properties of the draulic operating systems for airplane landing gear) but particular esters that were utilized for testing purposes.
- Corrosion- Oorrosion- Viscosity Viscosity Viscosity Pour Specific Inhibiting iblting of Esterin of Ester in Index of Point of Gravity Properties Ester of centipoises centipoises Ester Esterln of Ester In'lest Coal Acids at F. at 210 0.- F. at 25l25 C With 4CleF4 Isooctyl 629 30. 05 76 0 Excellent. Z-Ethyl-n-hcxyL 695 32. 45 78 -5 Do. De 96 12.16 -20 0.963 Do.
- coal acids being the water soluble mixed aromatic polycarboxylic'acids that are the products of the oxidation of coal and the like carbonaceous materials, which acids typicallyshave an average molecular weight of about 250
- composition of claim 1 containing from about 0.1 to 2 percent by weight of the dispersed ester.
- Non-corrodent composition comprised of 21 normally liquid chlorofiuorocarbon fluid in which there is dispersed between about 0.01 and, 5 percent by weight of an alkyl ester of coal acids in which the alkyl radical contains from about seven to thirteen carbon atoms.
- composition of claim 3, wherein the ester is the isoocytl ester of coal acids.
- composition of claim 3, wherein the ester is the Z-ethyl-n-hexyl ester of coal acids.
- composition of claim 3, wherein the chlorofluorocarbon fluid is hexachlorotetrafluorobutane.
Description
CORROSION INHIBITED FLUIDS Robert S. Montgomery, Midland, Mich., assignor to The teat which tend to be extremely corrosive to most of the metals that are commonly employed in such systems.
The coal acids that are employed to prepare the esters utilized in the present invention may be identical with Dow chemical Company, Midland Mich a carport 5 or similar to those which may be obtained in a known mm of Delaware manner bythe oxidation with gaseous oxygen of an aqueous alkaline slurry of a finely divided carbonaceous N0 Dl'aWlhg- Application December 5, 1956 material selected from the group consisting of coal and Serial No. 626,281 coke that has been obtained by the carbonization of coal at temperatures beneath about 700 C. Coal acids that 7 Claims. (Cl. 652.5) have been obtained by the nitric acid oxidation of suit- Thlfi invention relates to and has Its P P able carbonaceous materials are also generally satisfacjective the provision of certain media comprised of base tory fluids consisting of halogenated hydrocarbons that are The f coal aeids are hygroscopic, usually ll i not corrosive -va metal Surfaces, Particularly iron essentially water-soluble material. They are believed and Steel Surfaces, and Which are especially "tile t to be comprised substantially of various aromatic polyemploymeht as hydraulic fluids, as Coolants in metal carboxylic acids in a mixture having an average molecheat-exchanging Systems and for ike purposesular weight in the neighborhood of 250. Their average According to the present invention, a non-cerrodent equivalent weight is generally about eighty. They ordimedium is COl'IlPI'lSfld Of a base fluid 0f the indicated type narily appear to have an average of two and one-half containing a minor proportion of a miscible alkyl ester to five carboxylic groups per molecule with an apparent of coal acids in which the alkyl radical contains less than average f th t four being common. While their about twenty and Preferably from about Seven t0 thirteen exact chemical nature and constitution may be somewhat Car on at s i ts S r ctu e Adyantageollsly, the base conjectural, they evidently contain considerable quantifluid may be rendered non-corrosive to metals to provide i f t id tetra-carboxylic benzene a id as well as 8 ed in accordance With the invention y orporataromatic acids having more complex nuclei. Frequently, ing therein between about 0.01 and 5 percent by Weight of f example, the greatly preponderant proportion of arothe y ester of cDal acids, based on the Weight f the matic nuclei obtained in the conventionally manufactured noll-eoll'odent meflillmy P p it y e coal acids may be found to consist of methylnaphthalene, more advantageous to p y from t0 2 Percent y benzene, biphenyl, naphthalene, phenanthrene, alkyl benweight of the alkyl ester of coal acids in the medium. zene, benzophenone and toluene nuclei.
It is desirable for the alkyl ester of coal acids that is To alford additional delineation, several alkyl esters p y to he a completely of ntially compl t ly of coal acids were tested for their efiicacy in inhibiting the esterlfied p such an ester y be ed r adily corrosiveness upon metals of hexachlorotetrafluorobutane. as the Product of the reaction of tree e081 acids With In testing the halogenated hydrocarbon, about one persuitable alcohols and in other ways analogous to those cent by weight proportions of each of the alkyl esters of in which ordinary polycarboxylic acids are conventionally coal acids that were tested were incorporated in the base esterified. As indicated, it is of particular benefit in fluid. About seventy-five gram portions of each of the some cases for at least about a seven carbon atom alkyl thus-inhibited base fluids were added to a scalable sixradical to be employed in the ester. Esters of this variety ounce glass container along with about twenty-five grams tend to be more readily miscible with a larger proportion of distilled water. A one-quarter by two and one-half of the base fluids that are contemplated as being Within inch strip, having a thickness of about three-sixty-fourths the scope of the invention. Typical of the esters which of an inch, of Formula 52-100 cold rolled steel, wrapped may advantageously be utilized in the practice of the crosswise with seven turns and lengthwise with one turn invention are the isooctyl; 2-ethyl-n-hexyl; decyl; lauryl; of No. 19 copper wire, was inserted in each of the contridecyl and oleyl esters of coal acids and the like as well tainers. The containers were then tightly sealed and as their mixtures. tumbled for about forty-eight hours at a temperature of As mentioned, the base fluids that may be rendered about 200 F. At the termination of this period, the non-corrosive by the alkyl esters of coal acids consist of copper and steel specimens from each of the bottles were liquid halogenated hydrocarbons, including fluorinated, examined closely for evidences of corrosion and the steel chlorinated, brominated and mixed-halogenated derivastrip checked for possible weight loss. Each of the cor tives exclusive of iodine-containing compounds. Pracrosion-inhibited fluids were analyzed for possible changes tice of the invention is exceptionally advantageous with in their viscosity and increases in acidity. The results certain chlorofluorocarbons such as hexachlorotetrafluorowhich were obtained in each of the tests that was butane (C Cl F and the like which are exceptionally conducted are set forth in the following tabulation which useful as hydraulic fluids (as, for example, in the hyalso includes certain of the physical properties of the draulic operating systems for airplane landing gear) but particular esters that were utilized for testing purposes.
Corrosion- Oorrosion- Viscosity Viscosity Viscosity Pour Specific Inhibiting iblting of Esterin of Ester in Index of Point of Gravity Properties Ester of centipoises centipoises Ester Esterln of Ester In'lest Coal Acids at F. at 210 0.- F. at 25l25 C With 4CleF4 Isooctyl 629 30. 05 76 0 Excellent. Z-Ethyl-n-hcxyL 695 32. 45 78 -5 Do. De 96 12.16 -20 0.963 Do.
195 20.23 119 +35 0. 955 Good. 900 37.23 16 +10 0. 973 Do. 83. 76 13. 50 +25 Do.
As determined by A.8.T.M. D-445-53T for viscosity and D-567-53 l'or viscosity index. As determined by A.S.T.M. D-97-47.
Not determined.
Inicomparisomtests conducted with uninhibited control' samples caused extreme corrosion .of the metal specimens None of the infrom the halogenated hydrocarbon.
that were hibited hexachlorotetrafluorobutane fluids :testcd showed any appreciable change in viscosity or acid number after the tests. Likewise, no appreciable weight loss was discernible in the metal specimens tested in the than about twenty carbon atoms in its structure; said coal acids being the water soluble mixed aromatic polycarboxylic'acids that are the products of the oxidation of coal and the like carbonaceous materials, which acids typicallyshave an average molecular weight of about 250,
anaverage apparent equivalent weight of about 80, and
contain an average of from about two and oneshalf to 'five carboxylic groups per aromatic nuclei in their molecule.
2. The composition of claim 1 containing from about 0.1 to 2 percent by weight of the dispersed ester.
3. Non-corrodent composition comprised of 21 normally liquid chlorofiuorocarbon fluid in which there is dispersed between about 0.01 and, 5 percent by weight of an alkyl ester of coal acids in which the alkyl radical contains from about seven to thirteen carbon atoms.
4. The composition of claim 3, wherein the ester is the isoocytl ester of coal acids.
5. The composition of claim 3, wherein the ester is the Z-ethyl-n-hexyl ester of coal acids.
6. The composition of claim 3, wherein the ester is the decyl ester of coal acids.
7. The composition of claim 3, wherein the chlorofluorocarbon fluid is hexachlorotetrafluorobutane.
References Cited in the file of this patent UNITED STATES PATENTS 2,516,640 Montgomery et al. July '25, 1950
Claims (1)
1. NON-CORRODENT COMPOSITION COMPRISED OF A BASE FLUID CONSISTING OF A NORMALLY LIQUID HALOGENATED HYDROCARBON IN WHICH THERE IS DISPERSED A MINOR PROPORTION THAT IS NOT IN EXCESS OF ABOUT 5 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF SAID COMPOSITION, OF A MISCIBLE ALKYL ESTER OF COAL ACIDS IN WHICH THE ALKYL RADICAL CONTAINS LESS THAN ABOUT TWENTY CARBON ATOMS IN ITS STRUCTURE; SAID COAL ACIDS BEING THE WATER SOLUBLE MIXED AROMATIC POLYCARBOXYLIC ACIDS THAT ARE THE PRODUCTS OF THE OXIDATION OF COAL AND THE LIKE CARBONACEOUS MATERIALS, WHICH ACIDS TYPICALLY HAVE AN AVERAGE MOLECULAR WEIGHT OF ABOUT 250, AN AVERAGE APPARENT EQUIVALENT WEIGHT OF ABOUT 80, AND CONTAIN AN AVERAGE OF FROM ABOUT TWO AND ONE-HALF TO FIVE CARBOXYLIC GROUPS PER AROMATIC NUCLEI IN THEIR MOLECULE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US626281A US2878296A (en) | 1956-12-05 | 1956-12-05 | Corrosion inhibited fluids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US626281A US2878296A (en) | 1956-12-05 | 1956-12-05 | Corrosion inhibited fluids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2878296A true US2878296A (en) | 1959-03-17 |
Family
ID=24509731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US626281A Expired - Lifetime US2878296A (en) | 1956-12-05 | 1956-12-05 | Corrosion inhibited fluids |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2878296A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4105405A (en) * | 1976-11-27 | 1978-08-08 | Henkel Kommanditgesellschaft Auf Aktien | Method and composition for inhibiting corrosion of metals in contact with water |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2516640A (en) * | 1947-11-06 | 1950-07-25 | Gulf Research Development Co | Hydraulic fluids |
-
1956
- 1956-12-05 US US626281A patent/US2878296A/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2516640A (en) * | 1947-11-06 | 1950-07-25 | Gulf Research Development Co | Hydraulic fluids |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4105405A (en) * | 1976-11-27 | 1978-08-08 | Henkel Kommanditgesellschaft Auf Aktien | Method and composition for inhibiting corrosion of metals in contact with water |
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