US3047510A - Corrosion inhibiting compositions and process - Google Patents
Corrosion inhibiting compositions and process Download PDFInfo
- Publication number
- US3047510A US3047510A US663618A US66361857A US3047510A US 3047510 A US3047510 A US 3047510A US 663618 A US663618 A US 663618A US 66361857 A US66361857 A US 66361857A US 3047510 A US3047510 A US 3047510A
- Authority
- US
- United States
- Prior art keywords
- weight
- acid
- chloride
- dibutylthiourea
- corrosion inhibiting
- 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
- 230000007797 corrosion Effects 0.000 title claims description 27
- 238000005260 corrosion Methods 0.000 title claims description 27
- 239000000203 mixture Substances 0.000 title claims description 23
- 230000002401 inhibitory effect Effects 0.000 title claims description 18
- 238000000034 method Methods 0.000 title description 10
- KFFQABQEJATQAT-UHFFFAOYSA-N N,N'-dibutylthiourea Chemical compound CCCCNC(=S)NCCCC KFFQABQEJATQAT-UHFFFAOYSA-N 0.000 claims description 39
- 239000002253 acid Substances 0.000 claims description 35
- 229910052751 metal Inorganic materials 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 23
- 239000011885 synergistic combination Substances 0.000 claims description 14
- 239000007864 aqueous solution Substances 0.000 claims description 11
- 150000003856 quaternary ammonium compounds Chemical class 0.000 claims description 8
- 150000003016 phosphoric acids Chemical class 0.000 claims description 7
- 150000002739 metals Chemical class 0.000 claims description 6
- 230000009972 noncorrosive effect Effects 0.000 claims description 6
- 150000001338 aliphatic hydrocarbons Chemical group 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 150000004820 halides Chemical group 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 27
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 25
- 239000000243 solution Substances 0.000 description 17
- 125000004432 carbon atom Chemical group C* 0.000 description 9
- 239000003112 inhibitor Substances 0.000 description 9
- 235000011007 phosphoric acid Nutrition 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 8
- 238000005554 pickling Methods 0.000 description 7
- 239000011260 aqueous acid Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 125000005843 halogen group Chemical group 0.000 description 4
- 125000005064 octadecenyl group Chemical group C(=CCCCCCCCCCCCCCCCC)* 0.000 description 4
- 125000004079 stearyl 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])([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])[H] 0.000 description 4
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003240 coconut oil Substances 0.000 description 2
- 235000019864 coconut oil Nutrition 0.000 description 2
- 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 2
- 238000002845 discoloration Methods 0.000 description 2
- 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 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 125000001421 myristyl 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])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000000913 palmityl 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])([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 2
- 239000003549 soybean oil Substances 0.000 description 2
- 235000012424 soybean oil Nutrition 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000003760 tallow Substances 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 125000001204 arachidyl 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])([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])[H] 0.000 description 1
- 125000002511 behenyl 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])([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])C([H])([H])[H] 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- DDXLVDQZPFLQMZ-UHFFFAOYSA-M dodecyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)C DDXLVDQZPFLQMZ-UHFFFAOYSA-M 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 125000005456 glyceride group Chemical group 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 125000002347 octyl 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])[H] 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 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
- 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
- C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
- C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
Definitions
- This invention relates to new corrosion inhibitor compositions.
- this invention relates to corrosion resisting acid solutions useful in the cleaning of metallic surfaces.
- this invention relates to an improvement in the cleaning of metallic surfaces employing aqueous acid solutions.
- aqueous acid solutions are used to pickle iron and steel. That is, in the process of manufacturing, metal is worked at elevated temperatures and on cooling it becomes coated with a layer of oxide, generally called scale or mill scale.
- the process of removing scale and rust using dilute aqueous acid solutions is known as pickling.
- Most worked metal which is to be coated, plated or processed through a die, is first pickled. Because of its price, availability and ability to perform an efiicient job, sulfuric acid is used quite extensively in pickling, although sulfamic, phosphoric and other acids are also employed. Acid solutions are also commonly used in the cleaning of other metal surfaces such as Zinc, aluminum, brass and the like.
- the acid is free to corrode or dissolve the exposed metal surface.
- the corrosion rate of mild steel in 15%, by weight, sulfuric acid at 200 F. is over 2.5 pounds per square foot per day.
- about 2.5 pounds of 60 Baumm sulfuric acid are spent and nearly 7 cubic feet of hydrogen gas are evolved.
- pickling baths it is common for pickling baths to contain an acid corrosion inhibitor. These inhibitors must not retard the pickling efficiency of the acid, and should also reduce acid fuming and spattering into the atmosphere.
- a common deficiency in commercially available pickling bath inhibitors is the deposit of a resinous film on the surface of the metal which tends to color the same and interfere with subsequent cleaning and coating operations. Also, many of the available inhibitors are difiicult to work with by reason of their physical form and their slight solubility in the pickling bath.
- a synergistic corrosion inhibiting effect is produced by combining in a particular proportion two agents which by themselves are not particularly effective as corrosion inhibitors. These mixtures are easily handled, being liquid and soluble at ordinary temperatures, and leave the cleansed surface free of any undesirable resinous film. Also, these mixtures are particularly efiective corrosion inhibitors in sulfuric, sulfamic and phosphoric acid solutions.
- My improved corrosion inhibiting composition contains one part of dibutylthiourea and from 1 to parts by weight of a quaternary ammonium compound represented by the formula R NX wherein R is an aliphatic hydrocarbon radical having from 1 to 22 carbon atoms, said compound being further characterized by the fact that at least 1 and no more than 2 of the Rs is an aliphatic hydrocarbon radical containiug from 8 to 22 carbon atoms, and X is a halide such as chlorine or bromine.
- the preferred ratio of dibutylthiourea to quaternary ammonium compound is l to 3 parts by weight.
- Examples of long chain aliphatic hydrocarbon radicals having from 8 to 22 carbon atoms coming within the definition of R described hereinabove include octyl, decyl, dodecyl, tetradecyl, hexadecyl, octadecyl, octadecenyl, octadecadienyl, octadecatrienyl, docosyl, eicosyl, and mixtures of the foregoing hydrocarbon radicals as contained in naturally occurring glycerides such as coconut oil, tallow, soybean oil, and the like.
- coconut oil contains a mixture comprising approximately by weight 5% octadecenyl, 5% octadecyl, 8% hexadecyl, 18% tetradecyl, 47% dodecyl, 9% decyl, and 8% octyl radicals;
- tallow contains a mixture comprising approximately by weight 45% octadecenyl, 30% octadecyl, and 25% hexadecyl radicals; soybean oil contains a mixture comprising approximately by weight 37% octadecadienyl, 26% octadecenyl, 17% octadecyl, and 20% hexadecyl radicals.
- Examples of short chain aliphatic hydrocarbon radicals coming within the definition of R as described hereinabove include methyl, ethyl, propyl, butyl, and pentyl radicals.
- Examples of preferred mixtures useful in accordance with the present invention include three parts by weight of tallowtrimcthylammonium chloride per part of dibutylthiourea; 3 parts by weight of cocotrimethylammonium chloride per part of dibutylthiourea; 3 parts by weight of dicocodimethylammonium chloride per part of dibutylthiourea; 3 parts by weight of ditallowdimethylammonium chloride per part of dibutylthiourea; and 3 parts by weight of dodecyltrimethylammonium chloride per part of dibutylthiourea.
- These mixtures can be prepared by simple mixing of the ingredients in the proper proportions.
- the mixture of dibutylthiourea and quaternary ammonium compound can be incorporated directly into the aqueous acid solution in a concentration by weight of from about 0.1 to 1.0, preferably about 0.2 to about 0.5 percent, based upon the acid concentration, and the resulting aqueous acid solution used in the conventional manner in pickling and metal cleaning processes.
- the mixture can be incorporated, at the same concentration level described, into a concentrated acid, which is then diluted before use. There is little or no adverse effect upon the corrosion inhibiting properties of the acid under these circumstances, even after a period of storage.
- Example I Test cells containing small quantities of dilute acid, both inhibited and uninhibited were prepared. The concentnation of the acid was on a weight basis, and the percent inhibitor used was based on the acid concentration. The acid solutions were pre-heated to the desired temperature and held at i2 F. Clean, weighed mild steel coupons were exposed to the acid for 6 hours. At the end of this period the coupons were washed free of acid and salts, dried, and reweighed. The corrosion rate was calculated in pound per square foot per day. Visual observations were made for discoloration and pitting of the coupons. The results of these tests are set forth in Table I.
- Slight-Evensurface and edges have a few pit marks. 4. Slight-Suriace of metal is clean and edges for the most part are pitted. 5. Very slightSuriace of 3. EdgesSnrIace metal is clean and edges have only slight indications of being pitted. 6. Excellent-No trace of pitting detected.
- Coupon color 1. BlackSelf explanatory. 2. Tint-Surface of metal is slightly discolored. 3. Light-Clean surface, no indication of discoloration While the present invention has been described and exemplified in terms of preferred embodiments, those skilled in the art will appreciate that variations can be made without departing from the spirit and scope of the invention.
- a new corrosion inhibiting composition a synergistic combination of about 1 part by weight of dibutylthiourea and from 1 to 5 parts by weight of a quaternary ammonium compound represented by the formula R NX wherein X is a halide and R is an aliphatic hydrocarbon nadical containing from 1 to 22 carbon atoms, and further characterized by the fact that said quaternary ammonium compound contains at least 1 and no more than 2 long chain aliphatic hydrocarbon radicals having from 8 to 22 carbon atoms.
- a composition substantially non-corrosive to metals comprising an aqueous solution of an acid selected from the group consisting of sulfuric, sulfamic and phosphoric acids, and from 0.1 to 1.0 weight percent, based on the acid, of a corrosion inhibiting synergistic combination of about 1 part by weight of dibutylthiourea and from 1 to 5 parts by weight of a quaternary ammonium compound having the formula R NX wherein X is a halide and R is an aliphatic hydrocarbon radical containing from 1 to 22 carbon atoms, and further characterized by the presence of at least 1 and no more than 2 aliphatic hydrocarbon radicals containing from 8 to 22 carbon atoms.
- a composition substantially non-corrosive to metals comprising an aqueous solution of an acid selected from the group consisting of sulfuric, sulfamic, and phosphoric acids, and from 0.1 to 1.0 weight percent, based on the acid, of a corrosion inhibiting synergistic combination of 1 part by weight of dibutylthiourea and 3 parts by weight of cocotrimethyiammonium chloride.
- a composition substantially non-corrosive to metals comprising an aqueous solution of an acid selected from the group consisting of sulfuric, sulfamic, and phosphoric acids, and from 0.1 to 1.0 weight percent, based on the acid of a corrosion inhibiting synergistic combination of 1 part by weight of dibutylthiourea and 3 parts by weight of tallowtrimethylammonium chloride.
- a composition substantially non-corrosive to metals comprising an aqueous solution of sulfuric acid containing from about 0.2 to about 0.5 weight percent, based on the sulfuric acid, of a corrosion inhibiting synergistic combination of 1 part by weight of dibutylthiourea and 3 parts by weight of cocotrimethylammonium chloride.
- a composition substantially noncorrosive to metals comprising an aqueous solution of sulfuric acid containing from about 0.2 to about 0.5 weight percent, based upon the sulfuric acid, of a corrosion inhibiting synergistic combination of 1 part by weight of dibutylthiourea and 3 parts by Weight of tallowtrirnethylammonium chloride.
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)
- Detergent Compositions (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1193959D FR1193959A (en, 2012) | 1957-06-05 | ||
| BE566342D BE566342A (en, 2012) | 1957-06-05 | ||
| US663618A US3047510A (en) | 1957-06-05 | 1957-06-05 | Corrosion inhibiting compositions and process |
| GB10130/58A GB841925A (en) | 1957-06-05 | 1958-03-28 | Improvements in or relating to corrosion inhibitors |
| DEA29249A DE1111899B (de) | 1957-06-05 | 1958-04-14 | Korrosionsinhibitor fuer saure Loesungen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US663618A US3047510A (en) | 1957-06-05 | 1957-06-05 | Corrosion inhibiting compositions and process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3047510A true US3047510A (en) | 1962-07-31 |
Family
ID=24662594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US663618A Expired - Lifetime US3047510A (en) | 1957-06-05 | 1957-06-05 | Corrosion inhibiting compositions and process |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3047510A (en, 2012) |
| BE (1) | BE566342A (en, 2012) |
| DE (1) | DE1111899B (en, 2012) |
| FR (1) | FR1193959A (en, 2012) |
| GB (1) | GB841925A (en, 2012) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3147244A (en) * | 1961-04-05 | 1964-09-01 | Armour & Co | Composition for treating materials |
| US3260538A (en) * | 1963-11-26 | 1966-07-12 | Amchem Prod | Method of inhibiting corrosion |
| US3260673A (en) * | 1964-01-27 | 1966-07-12 | Monsanto Co | Corrosion inhibited phosphoric acid composition |
| US3294695A (en) * | 1962-06-27 | 1966-12-27 | Armour & Co | Corrosion inhibiting compositions and processes |
| US3457185A (en) * | 1966-10-14 | 1969-07-22 | Armour Ind Chem Co | Corrosion inhibited acidic solutions containing alkyl hexahydropyrimidine-2-thione and quaternary ammonium compounds |
| US3669902A (en) * | 1970-09-22 | 1972-06-13 | Abbott Lab | Dicyclohexylthiourea corrosion inhibitor composition |
| US4381249A (en) * | 1979-05-14 | 1983-04-26 | Bouffard Joseph O | Rust removing and metal surface protecting composition |
| US4541945A (en) * | 1982-09-30 | 1985-09-17 | Amchem Products | Inhibitor-containing acid cleaning compositions and processes |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB923865A (en) * | 1960-06-13 | 1963-04-18 | Union Chimique Belge Sa | Pickling inhibitor compositions |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1678775A (en) * | 1928-07-31 | Stobage and transportation of acid hixtttbes in steel dhotis | ||
| US1736118A (en) * | 1927-07-16 | 1929-11-19 | American Chem Paint Co | Method and means for selectively controlling metal-pickling baths |
| US2006216A (en) * | 1932-02-26 | 1935-06-25 | Ici Ltd | Inhibitor |
| DE732834C (de) * | 1938-12-16 | 1943-03-12 | Deutsche Hydrierwerke Ag | Reinigungsmittel fuer Metalle |
| US2461228A (en) * | 1949-02-08 | Donald lee miles | ||
| US2485529A (en) * | 1948-08-14 | 1949-10-18 | Dow Chemical Co | Composition for removing scale from ferrous metal surfaces |
| US2585127A (en) * | 1947-04-29 | 1952-02-12 | Turco Products Inc | Composition for cleaning aluminum and aluminum alloy surfaces preparatory to spot welding |
| US2617771A (en) * | 1946-09-27 | 1952-11-11 | Hooker Electrochemical Co | Corrosion retarder |
| US2628199A (en) * | 1949-12-21 | 1953-02-10 | Frederick A Lowenheim | Tarnish remover |
| US2662857A (en) * | 1948-03-26 | 1953-12-15 | Pennsylvania Salt Mfg Co | Pickling bath agent |
| US2713033A (en) * | 1952-09-15 | 1955-07-12 | Dow Chemical Co | Acidizing oil-bearing formations |
| US2728727A (en) * | 1952-06-19 | 1955-12-27 | Pure Oil Co | Method and composition for inhibiting corrosion |
| US2759975A (en) * | 1952-05-28 | 1956-08-21 | Gen Aniline & Film Corp | Mixed alkyl-benzyl-alkylol quaternary ammonium salts |
| US2947703A (en) * | 1958-07-16 | 1960-08-02 | Nalco Chemical Co | Process of inhibiting corrosion of ferrous metals in contact with aqueous solutions of acids |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL61842C (en, 2012) * | 1942-04-06 |
-
0
- BE BE566342D patent/BE566342A/xx unknown
- FR FR1193959D patent/FR1193959A/fr not_active Expired
-
1957
- 1957-06-05 US US663618A patent/US3047510A/en not_active Expired - Lifetime
-
1958
- 1958-03-28 GB GB10130/58A patent/GB841925A/en not_active Expired
- 1958-04-14 DE DEA29249A patent/DE1111899B/de active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1678775A (en) * | 1928-07-31 | Stobage and transportation of acid hixtttbes in steel dhotis | ||
| US2461228A (en) * | 1949-02-08 | Donald lee miles | ||
| US1736118A (en) * | 1927-07-16 | 1929-11-19 | American Chem Paint Co | Method and means for selectively controlling metal-pickling baths |
| US2006216A (en) * | 1932-02-26 | 1935-06-25 | Ici Ltd | Inhibitor |
| DE732834C (de) * | 1938-12-16 | 1943-03-12 | Deutsche Hydrierwerke Ag | Reinigungsmittel fuer Metalle |
| US2617771A (en) * | 1946-09-27 | 1952-11-11 | Hooker Electrochemical Co | Corrosion retarder |
| US2585127A (en) * | 1947-04-29 | 1952-02-12 | Turco Products Inc | Composition for cleaning aluminum and aluminum alloy surfaces preparatory to spot welding |
| US2662857A (en) * | 1948-03-26 | 1953-12-15 | Pennsylvania Salt Mfg Co | Pickling bath agent |
| US2485529A (en) * | 1948-08-14 | 1949-10-18 | Dow Chemical Co | Composition for removing scale from ferrous metal surfaces |
| US2628199A (en) * | 1949-12-21 | 1953-02-10 | Frederick A Lowenheim | Tarnish remover |
| US2759975A (en) * | 1952-05-28 | 1956-08-21 | Gen Aniline & Film Corp | Mixed alkyl-benzyl-alkylol quaternary ammonium salts |
| US2728727A (en) * | 1952-06-19 | 1955-12-27 | Pure Oil Co | Method and composition for inhibiting corrosion |
| US2713033A (en) * | 1952-09-15 | 1955-07-12 | Dow Chemical Co | Acidizing oil-bearing formations |
| US2947703A (en) * | 1958-07-16 | 1960-08-02 | Nalco Chemical Co | Process of inhibiting corrosion of ferrous metals in contact with aqueous solutions of acids |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3147244A (en) * | 1961-04-05 | 1964-09-01 | Armour & Co | Composition for treating materials |
| US3294695A (en) * | 1962-06-27 | 1966-12-27 | Armour & Co | Corrosion inhibiting compositions and processes |
| US3260538A (en) * | 1963-11-26 | 1966-07-12 | Amchem Prod | Method of inhibiting corrosion |
| US3260673A (en) * | 1964-01-27 | 1966-07-12 | Monsanto Co | Corrosion inhibited phosphoric acid composition |
| US3457185A (en) * | 1966-10-14 | 1969-07-22 | Armour Ind Chem Co | Corrosion inhibited acidic solutions containing alkyl hexahydropyrimidine-2-thione and quaternary ammonium compounds |
| US3669902A (en) * | 1970-09-22 | 1972-06-13 | Abbott Lab | Dicyclohexylthiourea corrosion inhibitor composition |
| US4381249A (en) * | 1979-05-14 | 1983-04-26 | Bouffard Joseph O | Rust removing and metal surface protecting composition |
| US4541945A (en) * | 1982-09-30 | 1985-09-17 | Amchem Products | Inhibitor-containing acid cleaning compositions and processes |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1193959A (en, 2012) | 1959-11-05 |
| GB841925A (en) | 1960-07-20 |
| BE566342A (en, 2012) | |
| DE1111899B (de) | 1961-07-27 |
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