US2518109A - Pickling of metals - Google Patents
Pickling of metals Download PDFInfo
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- US2518109A US2518109A US758729A US75872947A US2518109A US 2518109 A US2518109 A US 2518109A US 758729 A US758729 A US 758729A US 75872947 A US75872947 A US 75872947A US 2518109 A US2518109 A US 2518109A
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- pickling
- acid
- metal
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- 239000002184 metal Substances 0.000 title claims description 36
- 229910052751 metal Inorganic materials 0.000 title claims description 36
- 238000005554 pickling Methods 0.000 title claims description 35
- 150000002739 metals Chemical class 0.000 title description 5
- 239000002253 acid Substances 0.000 claims description 42
- 150000001875 compounds Chemical class 0.000 claims description 16
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 16
- 239000011707 mineral Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 10
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 6
- -1 arylene radical Chemical class 0.000 description 16
- 239000003112 inhibitor Substances 0.000 description 15
- 235000010755 mineral Nutrition 0.000 description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- 239000000047 product Substances 0.000 description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000002401 inhibitory effect Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 235000021110 pickles Nutrition 0.000 description 3
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 150000007522 mineralic acids Chemical class 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- MRORKWHSOOKUDV-UHFFFAOYSA-N 1h-benzo[e][1,3]benzothiazole-2-thione Chemical compound C1=CC=C2C(NC(S3)=S)=C3C=CC2=C1 MRORKWHSOOKUDV-UHFFFAOYSA-N 0.000 description 1
- PRCSESBJUUBNDJ-UHFFFAOYSA-N 2-methyl-6-(1,3-thiazol-2-yl)benzenethiol Chemical compound SC1=C(C=CC=C1C=1SC=CN1)C PRCSESBJUUBNDJ-UHFFFAOYSA-N 0.000 description 1
- MYBFPRUVQGKNIV-UHFFFAOYSA-N 4-chloro-3h-1,3-benzothiazole-2-thione Chemical compound C1=CC=C2SC(S)=NC2=C1Cl MYBFPRUVQGKNIV-UHFFFAOYSA-N 0.000 description 1
- GUISIVZZEFLXQH-UHFFFAOYSA-N 4-phenyl-3h-1,3-benzothiazole-2-thione Chemical compound C1=CC=C2SC(=S)NC2=C1C1=CC=CC=C1 GUISIVZZEFLXQH-UHFFFAOYSA-N 0.000 description 1
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- CTKINSOISVBQLD-UHFFFAOYSA-N Glycidol Chemical compound OCC1CO1 CTKINSOISVBQLD-UHFFFAOYSA-N 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N Nitrogen dioxide Chemical class O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 125000000732 arylene group Chemical group 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 125000001033 ether group Chemical group 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 230000000266 injurious effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 1
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010186 staining Methods 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
- C23G1/065—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors sulfur-containing compounds
Definitions
- the present invention relates to the cleaning of metallic surfaces and particularly to a new class of steel pickling inhibitors which are employed to prevent undue attack upon the surface of a metal when in contact with a pickling bath of an acid nature.
- these objectionable features of the pickling process are substantially overcome or reduced to a minimum. More specifically, some of the objects of the present invention are to obviate over-pickling, embrittlement and pitting of the articles treated; to minimize the amount of metal lost in pickling; to increase the efiiciency of the pickling operation; to prolong the efiective life of the pickling bath; and particularly to facilitate the pickling operation. Other and further objects of the invention will be apparent from the following description and accompanying examples.
- the new inhibitors may be prepared by introducing into mercaptoarylenethiazoles one or more hydroxy alkyl radicals.
- suitable arylene thiazoles from which the new inhibitors may be prepared are Z-mercaptobenzothiazole, 2 mercaptonaphthothiazole, 2 mercapto-4-phenylbenzothiazole, 2-mercaptochlorobenzothiazole, and 2-mercaptotolylthiazole.
- Condensation of mercaptoarylenethiazoles may be effected with ethylene oxide, propylene oxide, glycide, epichlorhydrin, glycol, glycerine, polyglycerine, and the like. Two or more of these reactive compounds may also be caused to react consecutively. The condensation is advantageously carried out in the presence of alkaline reacting agents or nickel sulfate as catalysts.
- a process of pickling a ferrous metal which comprises subjecting the metal to be pickled to the action of a heated nonoxidizing mineral acid solution containing about 0.2 to 0.5 percent by Weight based upon 100 percent acid of a compound of the structure S where Ar is an ortho arylene radical, R is an alkylene radical and n is "an integer greater than one but less than thirty-one.
- a process of pickling a ferrous metal which comprises subjecting the metal to be pickled to the action of a heated nonoxidizing mineral acid solution containing about 0.2 to 0.5 percent by weight based upon 100 percent acid of a compound of the structure s where Ar is an ortho arylene radical, Ris an alkylene radical of less than four carbon atoms and n is an integer greater than one but less than thirty-one.
- A- process of pickling a ferrous metal which comprises subjecting the metal to be pickled to the action of a heated nonoxidizing mineral acid solution containing about 0.2 to 0.5 percent by weight based upon 100 percent acid of a compound of the structure N Ar CB-(CsH4O)H s where Ar represents an ortho arylene radical and n is an integer greater than one but less than thirty-one.
- a process of pickling a ferrous metal which comprises subjecting the metal to be pickled to the action of a heated nonoxidizing mineral acid solution containing about 0.2 to 0.5 percent by weight based upon 100 percent acid of a compound of the structure where n is an integer greater than one but less than thirty-one.
- a process of pickling a. ferrous metal which comprises subjecting the metal to be pickled to the action of a heated nonoxidizing mineral acid solution containing about 0.2 to 0.5 percent by weight based upon percent acid of a compound of the structure 7 where n is an integer not less than ten but less than thirty-one.
- a process of pickling iron and steel products which comprises subjecting the metal tobe pickled to the action of a heated sulfuric acid solution containing about 0.2 to 0.5 percent by weight based upon l00'percent acid of a compound of the structure where n is an integer greater than five but less than thirty-one.
- a process of pickling iron and steel products which comprises subjecting the metal to be pickled to the action of a heated sulfuric acid solution containing about 0.2 to 0.5 percent by weight based upon 100 percent acid of a compound of the structure where n is approximately ten.
- a mineral acid pickling bath for me products which comprises a nonoxidizing mineral acid solution containin a small proportion suflicient to inhibit the action of the acid On ferrous metals of a compound of the structure.
- Ar is an ortho arylene radical
- R is an alkylene radical
- n is an integer greater than one but less than thirty-one.
- a mineral acid pickling bath for metal products which comprises a nonoxidizing mineral acid solution containing a small proportion sufficient to inhibit the action of the acid on ferrous metals of a compound of the structure whene'm: is anfortho arylenez' radical; R is; an alkylene radical of less than four atoms andi-n is an integer greater: than. one: but less thanthirty-one; c r V mineral-s. acid. pickling: bath. for metalnrodncts; which comprises a nonoxidizin-g min.- eraib.
- acici solution containing a: small, proportion sufficient to inhibit the action of the acid on ferrous metals of a, compound of the structure N "Ar o'--s csnioxnn I where Ar'oepresents an OBthOe arylene. radical and n is in integer greater than one less than thirty-one.
- a mineral acid pickling bath for metal products which comprises anonoxidizing' min-- eral acid solution containing a small proportion sufilcient to inhibit the action of the acid: on ferrous metals of a componnd of: the structure wheren is: an integer greater than one but. less than thirty-one. 7 V
- A. mineral acid, pickling bath: formetal nmducts comprises a. nonoxidizing mineral acid solution, containing: a small proportion s ufiieient tov inhibit the actionv of: the ,acipi on tel-trolls metals ofla compound of the'structnre where n is an integer not less than ten but less than thirty-one, v V
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)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Patented Aug. 8, 195
PICKLING OF METALS Richard 0. Zerbe, Nitro, W. Va., assignor to Monsanto Chemical Company, St. Louis, M0,, a corporation of Delaware No Drawing. Application July 2, 1947, Serial N0. 758,729
18 Claims.
The present invention relates to the cleaning of metallic surfaces and particularly to a new class of steel pickling inhibitors which are employed to prevent undue attack upon the surface of a metal when in contact with a pickling bath of an acid nature.
Pickling solutions for removing oxides from the surface of metals ordinarily consist largely of a dilute solution of an inorganic acid such as sulfuric or hydrochloric acid. The acid although it dissolves the oxides and scale, also attacks the metal to some extent so that the acid is largely consumed and a certain amount of metal is lost. It also appears that the hydrogen liberated by the action of the acid on the metal has a serious embrittling efiect upon the metal being treated. The escaping hydrogen also carries with it a fine spray of the acid liquor from the pickling bath which produces an atmosphere possessing corrosive properties and one which is injurious to health and damaging to equipment.
By the present invention, these objectionable features of the pickling process are substantially overcome or reduced to a minimum. More specifically, some of the objects of the present invention are to obviate over-pickling, embrittlement and pitting of the articles treated; to minimize the amount of metal lost in pickling; to increase the efiiciency of the pickling operation; to prolong the efiective life of the pickling bath; and particularly to facilitate the pickling operation. Other and further objects of the invention will be apparent from the following description and accompanying examples.
To accomplish to as great an extent as possible the objects set forth in accordance with the present invention, there is added to the pickling bath an inhibitor or regulating agent which acts to restrain the action of the acid from attacking clean metal but assists in removing the rust, scale, and other deposits or in other words the inhibitor causes the acid selectively to remove such materials without appreciably attacking the clean portions of the metal under treatment.
The new class of pickle regulators comprise 2-alkyl-mercaptoarylenethiazoles in which the alkyl group bears a terminal hydroxyl group and preferably contains one or more ether linkages. A general formula for the class of products of this invention is where Ar is an ortho arylene radical, R is an alkylene group and n is an integer.
The new inhibitors may be prepared by introducing into mercaptoarylenethiazoles one or more hydroxy alkyl radicals. Examples of suitable arylene thiazoles from which the new inhibitors may be prepared are Z-mercaptobenzothiazole, 2 mercaptonaphthothiazole, 2 mercapto-4-phenylbenzothiazole, 2-mercaptochlorobenzothiazole, and 2-mercaptotolylthiazole.
Condensation of mercaptoarylenethiazoles may be effected with ethylene oxide, propylene oxide, glycide, epichlorhydrin, glycol, glycerine, polyglycerine, and the like. Two or more of these reactive compounds may also be caused to react consecutively. The condensation is advantageously carried out in the presence of alkaline reacting agents or nickel sulfate as catalysts.
An important attribute of the new inhibitors is their ready solubility in the pickling baths. The problem of dispersing insoluble inhibitors is a troublesome one and the presence of undissolved particles in the cleaning bath frequently results in spotting and staining of the metal pieces. While all of the new inhibitors are at least partially soluble in acid pickling baths, those containing approximately four ether linkages are completely soluble. They produce a clear hazefree pickling bath. In addition, the presence of at least one ether group in the molecule increases the inhibiting strength. Therefore, compounds where n in the foregoing general formula is greater than unity are preferred. Solubility determinations carried out in cold dilute acid with condensation products of mercaptobenzothiazole and ethylene oxide revealed that the solubility in acid gradually increased with increasing values of 11.. Products in which the value of n was approximately 10 or more were completely soluble in cold 2% hydrochloric or sulfuric acid. In general, products in which the value of n is at least 5 but less than 31 are completely soluble in hot pickling baths in the amounts normally used.
It is usually preferred to employ between about one hundredth of one percent and three hundredths of one percent by weight based on the pickling bath. However, the composition, concentration, temperature of operation, and other factors vary with different baths and similarly the optimum concentration of inhibitor will Vary somewhat depending upon the particular conditions employed. The concentration of inhibitor based on the quantity of 100 per cent acid contained in the pickling bath is usually between portarit and highly efiicacious group of inhibitors as in all cases wherein one of the preferred inhibiting compounds was incorporated in the ipickle liquor there resulted a great saving in the loss in weight'of the steel test strips as com- Jpared with that resulting when no inhibitor was employed. I p r Other modes of employing inhibitors of the class hereinbefore set forth in the acid pickling of metals are apparent to those skilled in the art to which the invention pertains.- The products described may be employed in the presence of foaming agents, ionizable substances or other materials ordinarily used. Thus the preferred class of materials may beemployed as the sole inhibitor or they may be employed in conjunction with other materials exhibiting an inhibiting action or with inert fillers, dispersing agents, etc. Other non-oxidizing mineral acids than sulfuric acid may be employed in the pickle bath. Thus hydrochloric acid as well as other inorganic acids may be employed in the pickle bath in conjunction with the preferred class of inhibitors in the manner hereinbefore set forth.
What is claimed is: T
l. A process of pickling a ferrous metal which comprises subjecting the metal to be pickled to the action of a heated nonoxidizing mineral acid solution containing about 0.2 to 0.5 percent by Weight based upon 100 percent acid of a compound of the structure S where Ar is an ortho arylene radical, R is an alkylene radical and n is "an integer greater than one but less than thirty-one.
2, A process of pickling a ferrous metal which comprises subjecting the metal to be pickled to the action of a heated nonoxidizing mineral acid solution containing about 0.2 to 0.5 percent by weight based upon 100 percent acid of a compound of the structure s where Ar is an ortho arylene radical, Ris an alkylene radical of less than four carbon atoms and n is an integer greater than one but less than thirty-one.
3. A- process of pickling a ferrous metal which comprises subjecting the metal to be pickled to the action of a heated nonoxidizing mineral acid solution containing about 0.2 to 0.5 percent by weight based upon 100 percent acid of a compound of the structure N Ar CB-(CsH4O)H s where Ar represents an ortho arylene radical and n is an integer greater than one but less than thirty-one.
4. A process of pickling a ferrous metal which comprises subjecting the metal to be pickled to the action of a heated nonoxidizing mineral acid solution containing about 0.2 to 0.5 percent by weight based upon 100 percent acid of a compound of the structure where n is an integer greater than one but less than thirty-one.
5. A process of pickling a. ferrous metal which comprises subjecting the metal to be pickled to the action of a heated nonoxidizing mineral acid solution containing about 0.2 to 0.5 percent by weight based upon percent acid of a compound of the structure 7 where n is an integer not less than ten but less than thirty-one. Y
7. A process of pickling iron and steel products which comprises subjecting the metal tobe pickled to the action of a heated sulfuric acid solution containing about 0.2 to 0.5 percent by weight based upon l00'percent acid of a compound of the structure where n is an integer greater than five but less than thirty-one.
8. A process of pickling iron and steel products which comprises subjecting the metal to be pickled to the action of a heated sulfuric acid solution containing about 0.2 to 0.5 percent by weight based upon 100 percent acid of a compound of the structure where n is approximately ten. 9. A mineral acid pickling bath for me products which comprises a nonoxidizing mineral acid solution containin a small proportion suflicient to inhibit the action of the acid On ferrous metals of a compound of the structure.
where Ar is an ortho arylene radical, R is an alkylene radical and n is an integer greater than one but less than thirty-one.
10. A mineral acid pickling bath for metal products which comprises a nonoxidizing mineral acid solution containing a small proportion sufficient to inhibit the action of the acid on ferrous metals of a compound of the structure whene'm: is anfortho arylenez' radical; R is; an alkylene radical of less than four atoms andi-n is an integer greater: than. one: but less thanthirty-one; c r V mineral-s. acid. pickling: bath. for metalnrodncts; which comprises a nonoxidizin-g min.- eraib. acici solution, containing a: small, proportion sufficient to inhibit the action of the acid on ferrous metals of a, compound of the structure N "Ar o'--s csnioxnn I where Ar'oepresents an OBthOe arylene. radical and n is in integer greater than one less than thirty-one. a 12-; A mineral acid pickling bath for metal products which comprises anonoxidizing' min-- eral acid solution containing a small proportion sufilcient to inhibit the action of the acid: on ferrous metals of a componnd of: the structure wheren is: an integer greater than one but. less than thirty-one. 7 V
;.1'3-; A. mineral acid, pickling bath: formetal nmducts comprises a. nonoxidizing mineral acid solution, containing: a small proportion s ufiieient tov inhibit the actionv of: the ,acipi on tel-trolls metals ofla compound of the'structnre where n is an integer not less than ten but less than thirty-one, v V
15. A mineral acid. pickling bath for metal products which. comprises a sulfuric acid solution containing a small proportionsufiicient to mmmmne actifim" or; theacid on ferrous metals or aucomnound oi the structure so. I o-se-ecimoatn s csfplnionn where 'n is approximately ten.
17; A, process of. pickling, iron andv steel proclucts. which comprises. subiecting, the, metal, to be pickled to the action of a. heated; hydrochloric acid solution containing about 02 to 0.57 percent by weight based upon 100 percent. acid of a compound of, the structure where n is an integer greater than five but less than thirty-one.
RICHARD 0. ZERBE.
REFERENCES CITED Thefiollowing. references are of record in the file of this, patent; V
u "ED sTAsrEs, rem TS- Number Name 7 Date 990,963" Tep1pemaL-- Feb; 12', 1935 2383681 Pinkneyet a1 Aug. 28', 1945
Claims (1)
1. PROCESS OF PICKLING A FERROUS METAL WHICH COMPRISES SUBJECTING THE METAL TO BE PICKLED TO THE ACTION OF A HEATED NONOXIDIZING MINERAL ACID SOLUTION CONTAINING ABOUT 0.2 TO 0.5 PERCENT BY WEIGHT BASED UPON 100 PERCENT ACID OF A COMPOUND OF THE STRUCTURE
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US758729A US2518109A (en) | 1947-07-02 | 1947-07-02 | Pickling of metals |
| GB17426/48A GB692413A (en) | 1947-07-02 | 1948-06-29 | Improvements in or relating to methods of cleaning ferrous metal surfaces and to baths for use therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US758729A US2518109A (en) | 1947-07-02 | 1947-07-02 | Pickling of metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2518109A true US2518109A (en) | 1950-08-08 |
Family
ID=25052860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US758729A Expired - Lifetime US2518109A (en) | 1947-07-02 | 1947-07-02 | Pickling of metals |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2518109A (en) |
| GB (1) | GB692413A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2328783A1 (en) * | 1975-10-20 | 1977-05-20 | Albright & Wilson | COMPOSITION FOR POLISHING ALUMINUM CONTAINING A HETERO-ATOMIC AROMATIC COMPOUND |
| US4306988A (en) * | 1980-11-10 | 1981-12-22 | Olin Corporation | Selected poly(oxyalkylated) 1,3,4-thiadiazoles and their use as corrosion inhibitors |
| US4329475A (en) * | 1980-11-10 | 1982-05-11 | Olin Corporation | Selected poly(oxyalkylated) 1,3,4-thiadiazoles and their use as corrosion inhibitors |
| US4349458A (en) * | 1980-11-10 | 1982-09-14 | Olin Corporation | Selected poly(oxyalkylated) 1,3,4-thiadiazoles in acid baths and their use as corrosion inhibitors |
| DE10123210C1 (en) * | 2001-05-12 | 2002-10-02 | Clariant Gmbh | New ether carboxylic acids and salts derived from alkoxylated mercaptobenzothiazoles are used as corrosion inhibitors in metal working and petroleum and natural gas recovery and processing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1990963A (en) * | 1934-07-07 | 1935-02-12 | Wingfoot Corp | Pickling inhibitor |
| US2383681A (en) * | 1942-09-11 | 1945-08-28 | Du Pont | Composition and process for cleaning and pickling ferrous metals |
-
1947
- 1947-07-02 US US758729A patent/US2518109A/en not_active Expired - Lifetime
-
1948
- 1948-06-29 GB GB17426/48A patent/GB692413A/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1990963A (en) * | 1934-07-07 | 1935-02-12 | Wingfoot Corp | Pickling inhibitor |
| US2383681A (en) * | 1942-09-11 | 1945-08-28 | Du Pont | Composition and process for cleaning and pickling ferrous metals |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2328783A1 (en) * | 1975-10-20 | 1977-05-20 | Albright & Wilson | COMPOSITION FOR POLISHING ALUMINUM CONTAINING A HETERO-ATOMIC AROMATIC COMPOUND |
| US4306988A (en) * | 1980-11-10 | 1981-12-22 | Olin Corporation | Selected poly(oxyalkylated) 1,3,4-thiadiazoles and their use as corrosion inhibitors |
| US4329475A (en) * | 1980-11-10 | 1982-05-11 | Olin Corporation | Selected poly(oxyalkylated) 1,3,4-thiadiazoles and their use as corrosion inhibitors |
| US4349458A (en) * | 1980-11-10 | 1982-09-14 | Olin Corporation | Selected poly(oxyalkylated) 1,3,4-thiadiazoles in acid baths and their use as corrosion inhibitors |
| DE10123210C1 (en) * | 2001-05-12 | 2002-10-02 | Clariant Gmbh | New ether carboxylic acids and salts derived from alkoxylated mercaptobenzothiazoles are used as corrosion inhibitors in metal working and petroleum and natural gas recovery and processing |
| US20040152600A1 (en) * | 2001-05-12 | 2004-08-05 | Uwe Dahlmann | Ether carboxylic acids based on alkoxylated mercaptobenzothiazoles and use of the same as corrosion inhibitors |
| US7008561B2 (en) | 2001-05-12 | 2006-03-07 | Clariant Gmbh | Ether carboxylic acids based on alkoxylated mercaptobenzothiazoles and use of the same as corrosion inhibitors |
Also Published As
| Publication number | Publication date |
|---|---|
| GB692413A (en) | 1953-06-03 |
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