US3663386A - Electrocleaner composition and process - Google Patents
Electrocleaner composition and process Download PDFInfo
- Publication number
- US3663386A US3663386A US113752A US3663386DA US3663386A US 3663386 A US3663386 A US 3663386A US 113752 A US113752 A US 113752A US 3663386D A US3663386D A US 3663386DA US 3663386 A US3663386 A US 3663386A
- Authority
- US
- United States
- Prior art keywords
- composition
- alcohol
- cleaning
- percent
- caustic
- 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
- 239000000203 mixture Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004140 cleaning Methods 0.000 claims abstract description 36
- -1 monophosphate ester Chemical class 0.000 claims abstract description 28
- 150000001298 alcohols Chemical class 0.000 claims abstract description 23
- 239000003518 caustics Substances 0.000 claims abstract description 22
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 13
- 239000010452 phosphate Substances 0.000 claims abstract description 12
- 239000003595 mist Substances 0.000 claims abstract description 9
- 239000007921 spray Substances 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims abstract description 7
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical group CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 20
- 125000006353 oxyethylene group Chemical group 0.000 claims description 9
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- 238000005108 dry cleaning Methods 0.000 abstract description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 25
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 235000021317 phosphate Nutrition 0.000 description 11
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical group C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 8
- 150000003014 phosphoric acid esters Chemical class 0.000 description 6
- 239000004094 surface-active agent Substances 0.000 description 6
- 125000004432 carbon atom Chemical group C* 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 125000002947 alkylene group Chemical group 0.000 description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 description 4
- 235000017550 sodium carbonate Nutrition 0.000 description 4
- 235000011121 sodium hydroxide Nutrition 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 3
- 239000000176 sodium gluconate Substances 0.000 description 3
- 235000012207 sodium gluconate Nutrition 0.000 description 3
- 229940005574 sodium gluconate Drugs 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000006482 condensation reaction Methods 0.000 description 2
- MWKFXSUHUHTGQN-UHFFFAOYSA-N decan-1-ol Chemical compound CCCCCCCCCCO MWKFXSUHUHTGQN-UHFFFAOYSA-N 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 2
- BTFJIXJJCSYFAL-UHFFFAOYSA-N icosan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCCCO BTFJIXJJCSYFAL-UHFFFAOYSA-N 0.000 description 2
- GLDOVTGHNKAZLK-UHFFFAOYSA-N octadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 description 2
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- HLZKNKRTKFSKGZ-UHFFFAOYSA-N tetradecan-1-ol Chemical compound CCCCCCCCCCCCCCO HLZKNKRTKFSKGZ-UHFFFAOYSA-N 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- QBUKAFSEUHGMMX-MTJSOVHGSA-N (5z)-5-[[3-(1-hydroxyethyl)thiophen-2-yl]methylidene]-10-methoxy-2,2,4-trimethyl-1h-chromeno[3,4-f]quinolin-9-ol Chemical compound C1=CC=2NC(C)(C)C=C(C)C=2C2=C1C=1C(OC)=C(O)C=CC=1O\C2=C/C=1SC=CC=1C(C)O QBUKAFSEUHGMMX-MTJSOVHGSA-N 0.000 description 1
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 101100002917 Caenorhabditis elegans ash-2 gene Proteins 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 229910000318 alkali metal phosphate Inorganic materials 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 229960000541 cetyl alcohol Drugs 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- GOQYKNQRPGWPLP-UHFFFAOYSA-N n-heptadecyl alcohol Natural products CCCCCCCCCCCCCCCCCO GOQYKNQRPGWPLP-UHFFFAOYSA-N 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 235000011007 phosphoric acid Nutrition 0.000 description 1
- 235000011056 potassium acetate Nutrition 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- DZCAZXAJPZCSCU-UHFFFAOYSA-K sodium nitrilotriacetate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CC([O-])=O DZCAZXAJPZCSCU-UHFFFAOYSA-K 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- HERBOKBJKVUALN-UHFFFAOYSA-K trisodium;2-[bis(carboxylatomethyl)amino]acetate;hydrate Chemical compound O.[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CC([O-])=O HERBOKBJKVUALN-UHFFFAOYSA-K 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
Definitions
- ...C23b 1/00, C23b 1/04 caustc li are by [58] Field of Search I D 204/1 145 134/2 adding to the composition from 0.33 to 3.0 percent by weight of the dry cleaning composition a monophosphate ester of oxalk lated alcohol. The hos hate ester im roves the cleanin [56] References Clted Zfficlency of the electrglyti: process and at the same time UNITED STATES PATENTS minimizes the formation of spray, mist and the discharge of gases from the bath.
- an improved electrolytic caustic cleaning composition wherein the improvement comprises adding to the dry caustic composition from 0.33 to 3.0 percent by weight of the final dry caustic composition, a monophosphate ester of an oxyalkylated alcohol of the formula A-OR-H wherein A is an alkyl group having from to carbon atoms, R is a random mixture of oxyethylene and oxypropylene, said mixture being from 67 to 80 percent of the total weight of the compound and the weight ratio of oxyethylene to oxypropylene in said mixture being in the range from 3:1 to 7: 1.
- Electrolytic cleaning processes employing essentially insoluble anodes and cathodes with an aqueous caustic cleaning solution are improved by adding to the aqueous electrolyte from about 0.15 to 2.7 grams/liter of the foregoing phosphate ester.
- Caustic cleaning compositions for use in electrolytic cleaning processes typically contain an alkaline material such as alkali metal hydroxide, alkali metal carbonates, alkali metal silicates and alkali metal phosphates as the principal source of alkalinity.
- alkali metal hydroxide such as alkali metal hydroxide, alkali metal carbonates, alkali metal silicates and alkali metal phosphates as the principal source of alkalinity.
- organic materials such as sodium gluconate.
- Other modifiers are also added such as trisodium nitrilotriacetate or a sodium phosphate to improve the retention of the dirt in the solution. It will be recognized of course that some of the alkali metal salts such as soda ash also have a dirt suspending property.
- the alkali metal or caustic component is the major component and will normally constitute over 50 percent of the composition and more typically over 75 percent.
- To this composition is also added small amounts of an ordinary surface-active organic composition in an attempt to control spray and mist elimination plus reducing the dustiness of the dry alkali mix.
- organic surface-active agents are subject to attack by the alkali upon prolonged standing resulting in the discoloration and decomposition of the organic surface-active composition.
- the oxyalkylated alcohols which are used to prepare the monoesterified phosphoric acid esters useful in this invention have the formula A-O-R-H wherein A is the residue of the starting alcohol, and R taken collectively represents the residues of the oxyethylene and the oxypropylene groups used to oxyalkylate the alcohol.
- A is an alkyl group having from 10 to 20 carbon atoms or a mixture of alkyl groups having predominantly, that is, at least about percent, from 10 to 20 carbon atoms.
- the alcohol employed or the mixture of alcohols employed should have an average molecular weight of about 160 to about 260. Furthermore, it is preferable that the bulk of the alcohol so employed would be within the range of 10 to 15 carbon atoms.
- R represents the propylene oxide and ethylene oxide residues used in oxyalkylating the alcohol. This mixture of alkylene oxide residues is a random mixture as opposed to a block or regularly ordered sequence mixture. The mixture will contain a weight ratio of ethylene oxide to propylene oxide residues in the range from about 3:1 to about 7:1 and more desirably from about 5:1 to about 7:1. On a weight basis the R component of the oxyalkylated alcohol will be from about 67 percent to about 80 percent of the total weight of the oxyalkylated alcohol.
- the alcohols and oxides used to prepare the foregoing oxyalkylated alcohol are the normal typical ones of commerce.
- Examples of alcohols which are useful include decyl alcohol, dodecyl alcohol, tetradecyl alcohol, cetyl alcohol, lauryl alcohol, stearyl alcohol and eicosyl alcohol.
- Branched chain aliphatic alcohols are not operable in this invention. Mixtures of the alcohols can also be used.
- ALFOL I218 which is approximately a mixture of 40 percent (by weight) C alcohol, 30 percent C alcohol, 20 percent C alcohol and 10 percent C alcohol
- ALFOL 1210 which is approximately a mixture of 70 percent C and 30 percent C alcohols
- NEODOL 25 mixture of C C alcohols are included in the foregoing.
- the products of this invention are prepared by condensing an alcohol or a mixture of alcohols as described above with a mixture of ethylene oxide and propylene oxide.
- the oxide mixture may be added to the alcohol in one continuous step or it may be added in several steps. If the oxide mixture is added in several steps, it is not necessary that the amount of ethylene oxide and propylene oxide added in each step be within the required weight and ratio ranges. It is only necessary that the total amount of ethylene oxide and propylene oxide added constitute 67 to 80 weight percent of the condensate (surfactant) product and that the ratio of the total amount of ethylene oxide to the total amount of propylene oxide be in the range of about 3:1 to about 7:1.
- the oxyalkylated alcohols are generally prepared by condensing the alcohol with a mixture of ethylene oxide and propylene oxide in the presence of an alkaline catalyst.
- Catalysts which may be employed include sodium hydroxide, potassium hydroxide, sodium methylate, potassium acetate, sodium acetate and triethylamine. Any other types of catalysts commonly used for alkylene oxide condensation reactions can also be employed.
- the condensation is preferably carried out at elevated temperatures and pressures such as C. to about C. and 30 to 90 psig.
- the catalyst is removed from the reaction mixture by any known procedure such as neutralization and filtration or ion exchange. It will be readily apparent to those skilled in preparing surfactants that many other combinations and permutations of pressures, catalyst and temperatures may be employed in the preparation of the oxyalkylated alcohols utilized in this invention and that such pennutations and combinations are to be considered within the scope of this invention.
- the monophosphate ester of the oxyalkylated alcohol is preferably added to the dry caustic electrolytic cleaner composition in order to obtain the greatest benefits of this invention.
- the phosphate ester is stable in the presence of caustic and, therefore, does not discolor nor deteriorate. Additionally, the phosphate ester acts as a dedusting agent reducing or completely eliminating the fine alkali dust which is otherwise associated with such a dry mix.
- the order of incorporation of the phosphate ester into the dry electrolytic cleaner composition is not too important; however, the greatest benefits are achieved when all or most of the dry ingredients are first added to the blending tank and then the phosphate ester is added. Additionally, the phosphate esters can be added directly to the aqueous electrolytic cleaner bath composition but in so doing the subsidiary advantage of dust control is lost.
- the phosphate esters of this invention will comprise from about one-third of one percent to about three percent of the total dry caustic electrolytic cleaner composition. Best results are obtained when the electrolytic cleaner bath solution composition containing the phosphate ester has a concentration from about 40 to about 120 grams per liter of the composition of this invention. When the phosphate ester is added separately to the bath solution, satisfactory results are obtained by the addition of about 0. l to about 2.7 grams per liter of bath solution.
- Monophosphate ester of this invention Total: lO0.0
- the alcohol contained a mixture of approximately 40% t1, alcohol, 30% C alcohol, C alcohol and IOZ- C alcohol, and the alkylene oxide (78 parts) in a ratio of6.8:l ofethylene oxide to propylene oxide.
- Temperature was 130 to 200 F. with a time of 10 seconds to 4 minutes and current density of 10 to 100 amps per square feet.
- the alcohol (20 pans) contained a mixture of C alcohol, 8.5% C alcohol and 6.5% C alcohol, and the alkylene oxide (80 parts) wherein the ratio ofethylene oxide to propylene oxide was 5.67:].
- the composition was used at the rate of 60 grams per liter of cleaning bath solution at a temperature of F.
- the anodic current was supplied for a period of 15 to 30 seconds at an average current density of 10 amps per square feet.
- One inch of foam was obtained with soil removal (number 50 Iubricat ing oil from cold rolled steel panels) of 71 percent.
- Example III was repeated except that the phosphate ester was based on the oxyalkylated alcohol of 60 parts of the alcohol described in Example I and 40 parts of ethylene oxide: The foaming height was 1 inch and the percent soil removed was 43 percent.
- the monophosphate esters employed in this invention produce a thicker or heavier and more uniform foam blanket thereby better controlling the amount of spray, mist and gases evolved from the cleaning solution, control the dustiness of the dry cleaning mixture without the composition or discoloration. More importantly, and completely unexpectedly, the phosphate esters have a cleaning efficiency (in the amount of soil removed and retained in the cleaning bath) of nearly twice other phosphate esters outside the scope of this invention.
- An improved electrolytic caustic cleaning composition wherein the improvement comprises adding to the dry caustic composition from 0.33 to 3.0 percent by weight of the final dry caustic composition, a monophosphate ester of an oxyalkylated alcohol of the formula A-O-R-H wherein A is an alkyl group having from to carbon atoms, R is a random mixture of oxyethylene and oxypropylene, said mixture being from 67 to 80 percent of the total weight of the oxyalkylated alcohol and the weight ratio of oxyethylene to oxypropylene at said mixture being in the range from 3:1 to 7: l.
- composition according to claim 2 wherein the ratio of oxyethylene to oxypropylene groups is from about 5:1 to 7:1.
- a caustic electrolytic cleaning solution containing from about 40 to about grams of the composition of claim 1 per liter of cleaning solution.
- the improvement comprises minimizing the formation of spray, mist and discharge of gases, and improving the cleaning efficiency during the passage of an electric current by incorporating into said aqueous caustic cleaning solution 0.15 to 2.7 grams per liter of the phosphate ester of an oxyalkylated alcohol according to claim 1.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11375271A | 1971-02-08 | 1971-02-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3663386A true US3663386A (en) | 1972-05-16 |
Family
ID=22351289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US113752A Expired - Lifetime US3663386A (en) | 1971-02-08 | 1971-02-08 | Electrocleaner composition and process |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3663386A (it) |
| CA (1) | CA986878A (it) |
| FR (1) | FR2124566B1 (it) |
| GB (1) | GB1356361A (it) |
| IT (1) | IT948465B (it) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4039410A (en) * | 1976-06-07 | 1977-08-02 | Bundy Corporation | Electrocleaning process |
| US5272850A (en) * | 1991-05-06 | 1993-12-28 | Icon, Incorporated | Panel connector |
| WO2003087438A1 (de) * | 2002-04-12 | 2003-10-23 | Wolf-Dieter Franz | Verfahren zum reinigen und passivieren von zink- und zinklegierungsoberflächen |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2605635B1 (fr) * | 1986-10-27 | 1992-02-21 | Sandoz Sa | Nouveaux esters partiels de l'acide phosphorique, leur preparation et leur utilisation pour le pre-traitement des matieres textiles |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2420602A (en) * | 1943-03-05 | 1947-05-13 | Du Pont | Electrolytic cleaning process |
| US2915444A (en) * | 1955-12-09 | 1959-12-01 | Enthone | Process for cleaning and plating ferrous metals |
| US3078203A (en) * | 1958-10-20 | 1963-02-19 | Gen Motors Corp | Method of etching ferrous alloy and composition |
| US3207683A (en) * | 1962-02-05 | 1965-09-21 | Coussinets Ste Indle | Process of electrolytic surface treatment of metals |
| US3445355A (en) * | 1966-07-15 | 1969-05-20 | Ibm | Method and composition for the electrolytic etching of beryllium-copper alloys |
| US3468774A (en) * | 1966-12-09 | 1969-09-23 | Rohr Corp | Electrolytic descaling of titanium and its alloys |
| US3528896A (en) * | 1968-04-17 | 1970-09-15 | Olin Corp | Process for electrochemically cleaning and brightening copper alloy and brass strip |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3168478A (en) * | 1960-07-28 | 1965-02-02 | Gen Aniline & Film Corp | Highly alkaline surface active compositions |
-
1971
- 1971-02-08 US US113752A patent/US3663386A/en not_active Expired - Lifetime
-
1972
- 1972-01-31 GB GB440572A patent/GB1356361A/en not_active Expired
- 1972-02-07 CA CA134,042A patent/CA986878A/en not_active Expired
- 1972-02-08 FR FR7204170A patent/FR2124566B1/fr not_active Expired
- 1972-02-08 IT IT48196/72A patent/IT948465B/it active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2420602A (en) * | 1943-03-05 | 1947-05-13 | Du Pont | Electrolytic cleaning process |
| US2915444A (en) * | 1955-12-09 | 1959-12-01 | Enthone | Process for cleaning and plating ferrous metals |
| US3078203A (en) * | 1958-10-20 | 1963-02-19 | Gen Motors Corp | Method of etching ferrous alloy and composition |
| US3207683A (en) * | 1962-02-05 | 1965-09-21 | Coussinets Ste Indle | Process of electrolytic surface treatment of metals |
| US3445355A (en) * | 1966-07-15 | 1969-05-20 | Ibm | Method and composition for the electrolytic etching of beryllium-copper alloys |
| US3468774A (en) * | 1966-12-09 | 1969-09-23 | Rohr Corp | Electrolytic descaling of titanium and its alloys |
| US3528896A (en) * | 1968-04-17 | 1970-09-15 | Olin Corp | Process for electrochemically cleaning and brightening copper alloy and brass strip |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4039410A (en) * | 1976-06-07 | 1977-08-02 | Bundy Corporation | Electrocleaning process |
| US5272850A (en) * | 1991-05-06 | 1993-12-28 | Icon, Incorporated | Panel connector |
| WO2003087438A1 (de) * | 2002-04-12 | 2003-10-23 | Wolf-Dieter Franz | Verfahren zum reinigen und passivieren von zink- und zinklegierungsoberflächen |
| EP1361297A1 (de) * | 2002-04-12 | 2003-11-12 | Wolf-Dieter Franz | Verfahren zum Reinigen und Passivieren von Zink- und Zinklegierungsoberflächen |
Also Published As
| Publication number | Publication date |
|---|---|
| CA986878A (en) | 1976-04-06 |
| GB1356361A (en) | 1974-06-12 |
| IT948465B (it) | 1973-05-30 |
| FR2124566B1 (it) | 1974-08-02 |
| FR2124566A1 (it) | 1972-09-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: DIVERSEY WYANDOTTE CORPORATION, A CORP. OF DE., MI Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DIVERSEY CORPORATION THE;REEL/FRAME:003954/0125 Effective date: 19820107 Owner name: DIVERSEY WYANDOTTE CORPORATION, 1532 BIDDLE AVE., Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DIVERSEY CORPORATION THE;REEL/FRAME:003954/0125 Effective date: 19820107 |