EP0408423A1 - Compositions protectrices des métaux, leurs procédés de préparation, et procédés de protection des métaux - Google Patents
Compositions protectrices des métaux, leurs procédés de préparation, et procédés de protection des métaux Download PDFInfo
- Publication number
- EP0408423A1 EP0408423A1 EP90401929A EP90401929A EP0408423A1 EP 0408423 A1 EP0408423 A1 EP 0408423A1 EP 90401929 A EP90401929 A EP 90401929A EP 90401929 A EP90401929 A EP 90401929A EP 0408423 A1 EP0408423 A1 EP 0408423A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- solution
- dicyclohexylamine
- mixture
- metals
- stearic acid
- 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.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 50
- 239000002184 metal Substances 0.000 title claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 6
- 230000001681 protective effect Effects 0.000 title claims description 20
- 150000002739 metals Chemical class 0.000 claims abstract description 18
- XBPCUCUWBYBCDP-UHFFFAOYSA-N Dicyclohexylamine Chemical compound C1CCCCC1NC1CCCCC1 XBPCUCUWBYBCDP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 15
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 15
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000008117 stearic acid Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- GGZHVNZHFYCSEV-UHFFFAOYSA-N 1-Phenyl-5-mercaptotetrazole Chemical compound SC1=NN=NN1C1=CC=CC=C1 GGZHVNZHFYCSEV-UHFFFAOYSA-N 0.000 claims abstract description 9
- 150000007980 azole derivatives Chemical class 0.000 claims abstract description 7
- 238000005260 corrosion Methods 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 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
Definitions
- the present invention relates to compositions for protecting metals as well as to a process for the manufacture of said compositions, and to a process for protecting metals.
- Some of these products contain chromic acid. This compound, which is suitable for cleaning metal surfaces, however has only limited effectiveness in protecting them against oxidation.
- the object of the present invention is therefore to provide a new composition for protecting metals which is more effective than the known compositions, and non-toxic since it does not require the use of an organic solvent.
- the present invention relates to protective compositions for metals, characterized in that they contain a mixture consisting of stearic acid, dicyclohexylamine, and an azole derivative endowed with anticorrosive properties.
- the protective compositions for metals in accordance with the present invention contain a mixture comprising from 0.8 to 1.5 g / l of an appropriate azole derivative, endowed with anti-corrosion properties, and from 0.005 to 0.01 g / l of a stearic acid: dicyclohexylamine mixture in a 1: 1 molar ratio, in solution in water
- said composition contains a mixture consisting of 0.8 to 1.5 g / l of 1-phenyl-5-mercaptotetrazole, and 0.005 to 0.01 g / l of an acid mixture stearic: dicyclohexylamine in a 1: 1 molar ratio, in solution in water.
- the present invention further relates to a process for the preparation of a protective composition for metals, characterized in that a solution of an appropriate azole derivative, endowed with anti-corrosive properties, is prepared in water , at a concentration of 0.8 to 1.5 g / l and adding to this solution 0.005 to 0.01 g / l of an equimolar mixture of stearic acid and dicyclohexylamine.
- a solution of 1-phenyl-5-mercaptotetrazole in water is prepared, at a concentration of 0.8 to 1.5 g / l and in that 0.005 to 0.01 g / l of an equimolar mixture of stearic acid and dicyclohexylamine are added to this solution.
- the present invention further relates to a method for protecting a metal surface, characterized in that said metal surface is brought into contact with a protective composition according to the present invention, then rinsed with water.
- the metal surface to be protected is immersed in the protective composition.
- the protective composition is sprayed onto the metal surface to be protected.
- a stearic acid: dicyclohexylamine mixture is carried out in the molar ratio 1: 1. The mixture is brought to 70 ° C., then cooled to room temperature. 0.005 g of this powdered mixture are dissolved, with stirring, in a liter of 1-phenyl-5-mecaptotetrazole solution.
- Example 2 The operation is carried out according to the method described in Example 1, using a 1.5 g / l solution of 1-phenyl-5-mercaptotetrazole, to which 0.008 g / l of the stearic acid: dicyclohexylamine mixture is added.
- Example 2 The operation is carried out according to the method described in Example 1, using a 0.8 g / l solution of 1-phenyl-5-mercaptotetrazole, to which 0.006 g / l of the stearic acid: dicyclohexylamine mixture is added.
- Example 2 The operation is carried out according to the method described in Example 1, using a solution of 1.2 g / l of 1-phenyl-5-mercaptotetrazole, to which 0.01 g / l of the stearic acid: dicyclohexylamine mixture is added.
- the metal surface to be treated is pickled, if necessary, by a treatment with chromic acid, followed by a treatment with concentrated NH3, then rinsed with tap water and distilled water.
- the surface to be treated is immersed in the protective composition prepared according to one of examples 1 to 4, maintained at a temperature of 30 to 40 ° C, for a period of 3 to 5 minutes, then rinsed twice with distilled water .
- the first rinse is carried out at room temperature, the second rinse at a temperature of 50 to 60 ° C. the metal surface is then dried at a temperature of about 60 to 70 ° C.
- a protective composition prepared according to one of examples 1 to 4 is sprayed onto the surface to be protected and left in contact with it for 3 to 5 minutes.
- the surface thus treated is rinsed and dried as described in the previous example.
- One liter of protective solution makes it possible to treat, by one or other of the methods given as an example, a metal surface of 40 to 70 dm2.
- an untreated silver object changes color after 2 minutes, while the treated object retains its color for 60 minutes.
- An untreated copper plate completely changes color after one minute, while a treated copper plate begins to change color after 132 minutes.
- An object in 18 carat gold changes color after 60 minutes without treatment, and 230 minutes after treatment.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Paints Or Removers (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
- La présente Invention est relative à des compositions protectrices des métaux ainsi qu'à un procédé pour la fabrication desdites compositions, et à un procédé de protection des métaux.
- De nombreux métaux subissent une oxydation superficielle du simple fait de leur exposition à l'air. Ceci a pour conséquence non seulement une altération de la couleur et de la brillance desdits métaux, mais également une altération de leurs propriétés, telles que la conductivité.
- Il est donc important de disposer de produits permettant la protection des surfaces métalliques, dans le but de conserver leur aspect décoratif, et leurs propriétés fonctionnelles.
- Certains produits ont été conçus dans ce but. Ces produits présentent cependant l'inconvénient de contenir des solvants organiques tels que le dichloroéthane, qui, outre leur odeur désagréable, présentent une certaine toxicité, ce qui en limite l'emploi.
- Certains de ces produits contiennent de l'acide chromique. Ce composé, qui convient au nettoyage des surfaces métalliques, n'a en revanche qu'une efficacité limitée pour protéger celles-ci contre l'oxydation.
- Le but de la présente invention est donc de fournir une nouvelle composition protectrice des métaux plus efficace que les compositions connues, et non-toxique car ne nécessitant pas l'emploi d'un solvant organique.
- La présente Invention a pour objet des compositions protectrices des métaux caractérisées en ce qu'elles contiennent un mélange constitué d'acide stéarique, de dicyclohexylamine, et d'un dérivé d'azole doté de propriétés anticorrosives.
- Selon un mode de réalisation préférée des compositions protectrices des métaux conformes à la présente Invention, elles contiennent un mélange comprenant de 0,8 à 1,5 g/l d'un dérivé d'azole approprié, doté de propriétés anti-corrosives, et de 0,005 à 0,01 g/l d'un mélange acide stéarique:dicyclohexylamine dans un rapport molaire 1:1, en solution dans l'eau
- Selon une disposition préférée de ce mode de réalisation, ladite composition contient un mélange constitué de 0,8 à 1,5 g/l de 1-phényl-5-mercaptotétrazole, et 0,005 à 0,01 g/l d'un mélange acide stéarique:dicyclohexylamine dans un rapport molaire 1:1, en solution dans l'eau.
- La présente Invention a en outre pour objet un procédé de préparation d'une composition protectrice des métaux, caractérisé en ce que l'on prépare une solution d'un dérivé d'azole approprié, doté de propriétés anti-corrosives, dans l'eau, à une concentration de 0,8 à 1,5 g/l et en ce qu'on ajoute à cette solution 0,005 à 0,01 g/l d'un mélange équimolaire d'acide stéarique et de dicyclohexylamine.
- Selon un mode de mise en oeuvre préféré de ce procédé, l'on prépare une solution de 1-phényl-5-mercaptotétrazole dans l'eau, à une concentration de 0,8 à 1,5 g/l et en ce qu'on ajoute à cette solution 0,005 à 0,01 g/l d'un mélange équimolaire d'acide stéarique et de dicyclohexylamine.
- La présente Invention a en outre pour objet un procédé pour protéger une surface métallique, caractérisé en ce que ladite surface métallique est mise en contact avec une composition protectrice selon la présente Invention, puis rincée à l'eau.
- Selon un mode de mise en oeuvre préféré de ce procédé, la surface métallique à protéger est immergée dans la composition protectrice.
- Selon un autre mode de mise en oeuvre de ce procédé, la composition protectrice est pulvérisée sur la surface métallique à protéger.
- La présente Invention sera mieux comprise à l'aide du complément de description qui va suivre, qui se réfère à des exemples de préparation des compositions et de mise en oeuvre des procédés de protection des métaux qui font l'objet de la présente Invention.
- Il doit être bien entendu, toutefois, que ces exemples sont donnés uniquement à titre d'illustration de l'objet de la présente Invention dont ils ne constituent en aucune manière une limitation.
- On prépare une solution à 1 g/l de 1-phényl-5-mercaptotétrazole.
- On effectue un mélange acide stéarique:dicyclohexylamine dans le rapport molaire 1:1. Le mélange est porté à 70°C, puis refroidi à température ambiante. 0,005 g de ce mélange réduit en poudre sont dissous, par agitation, dans un litre de solution de 1-phényl-5-mécaptotétrazole.
- On opère suivant le procédé décrit dans l'exemple 1, en utilisant une solution à 1,5 g/l de 1-phényl-5-mercaptotétrazole, à laquelle on ajoute 0,008 g/l du mélange acide stéarique:dicyclohexylamine.
- On opère suivant le procédé décrit dans l'exemple 1, en utilisant une solution à 0,8 g/l de 1-phényl-5-mercaptotétrazole, à laquelle on ajoute 0,006 g/l du mélange acide stéarique:dicyclohexylamine.
- On opère suivant le procédé décrit dans l'exemple 1, en utilisant une solution à 1,2 g/l de 1-phényl-5-mercaptotétrazole, à laquelle on ajoute 0,01 g/l du mélange acide stéarique:dicyclohexylamine.
- La surface métallique à traiter est décapée, si nécessaire, par un traitement à l'acide chromique, suivi d'un traitement par NH₃ concentré, puis rincée à l'eau du robinet et à l'eau distillée. La surface à traiter est immergée dans la composition protectrice préparée selon l'un des exemples 1 à 4, maintenue à une température de 30 à 40°C, pendant une durée de 3 à 5 mn, puis rincée deux fois à l'eau distillée. Le premier rinçage est effectué à température ambiante, le deuxième rinçage à une température de 50 à 60°C. la surface métallique est ensuite séchée à une température d'environ 60 à 70°C.
- Après décapage de la surface métallique à traiter, une composition protectrice préparée selon l'un des exemples 1 à 4 est pulvérisée sur la surface à protéger et laissée au contact de celle-ci pendant 3 à 5 mn.
- La surface ainsi traitée est rincée et séchée comme décrit à l'exemple précédent.
- Un litre de solution protectrice permet de traiter, par l'une ou l'autre des méthodes données en exemple, une surface métallique de 40 à 70 dm².
- Des objets métalliques traités comme décrit aux exemples 5 et 6 sont exposés à une atmosphère contenant 1% d'H₂S, jusqu'à apparition d'un changement de couleur.
- Dans ces conditions, un objet en argent non traité change de couleur au bout de 2 mn, alors que l'objet traité conserve sa couleur pendant 60 mn.
- Une plaquette de cuivre non traitée change entièrement de couleur au bout d'une minute, alors qu'une plaque de cuivre traitée commence à changer de couleur au bout de 132 minutes.
- Un objet en or 18 carats change de couleur après 60 mn sans traitement, et 230 mn après traitement.
Claims (8)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8909378 | 1989-07-12 | ||
FR8909378A FR2649725B1 (fr) | 1989-07-12 | 1989-07-12 | Composition protectrice des metaux, son procede de preparation, et procedes de protection des metaux |
FR9005670A FR2661690A1 (fr) | 1989-07-12 | 1990-05-04 | Compositions protectrices des metaux, leur procede de preparation, et leurs procedes de protection des metaux. |
FR9005670 | 1990-05-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0408423A1 true EP0408423A1 (fr) | 1991-01-16 |
EP0408423B1 EP0408423B1 (fr) | 1994-09-21 |
Family
ID=26227469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90401929A Expired - Lifetime EP0408423B1 (fr) | 1989-07-12 | 1990-07-04 | Compositions protectrices des métaux, leurs procédés de préparation, et procédés de protection des métaux |
Country Status (10)
Country | Link |
---|---|
US (1) | US5156892A (fr) |
EP (1) | EP0408423B1 (fr) |
JP (1) | JP2835158B2 (fr) |
AT (1) | ATE111973T1 (fr) |
DE (1) | DE69012687T2 (fr) |
DK (1) | DK0408423T3 (fr) |
ES (1) | ES2063308T3 (fr) |
FR (1) | FR2661690A1 (fr) |
IE (1) | IE65532B1 (fr) |
PT (1) | PT94667B (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5378798A (en) * | 1992-07-10 | 1995-01-03 | Shell Oil Company | Composition and process for coating metallic substrates |
EP0636937B1 (fr) | 1993-07-28 | 2000-10-04 | Chugai Photo Chemical Co. Ltd. | Composition contenant un agent développateur pour la couleur, révélateur pour le traitement de matériaux photographiques couleur à l'halogénure d'argent et méthode à cet effet |
US20050145311A1 (en) * | 2003-12-30 | 2005-07-07 | Walker Elizabeth L. | Method for monitoring surface treatment of copper containing devices |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3341461A (en) * | 1964-07-24 | 1967-09-12 | C J Webb Inc | Composition for protecting metals against corrosion |
US3382087A (en) * | 1964-08-20 | 1968-05-07 | Pittsburgh Plate Glass Co | Silver and copper coated articles protected by treatment with aminoazole compounds |
GB1183399A (en) * | 1966-10-07 | 1970-03-04 | Hoechst Ag | Liquid Fuels |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3015580A (en) * | 1948-08-30 | 1962-01-02 | William A Zisman | Method of protecting a metal surface with a coating of primary-n-octa-decylamine andarticle produced thereby |
DE1301475C2 (de) * | 1965-10-02 | 1973-07-12 | Bayer Ag | Verfahren zur Erhoehung der Haftfestigkeit zwischen Gummi und Textilien |
US3573225A (en) * | 1968-02-01 | 1971-03-30 | Masahiko Kondo | Rust-proofing composite solutions |
US3625859A (en) * | 1968-08-06 | 1971-12-07 | San Abbott Ltd | Corrosion inhibiting composition |
JPS5013751Y1 (fr) * | 1970-11-11 | 1975-04-26 | ||
JPS5013750U (fr) * | 1973-06-06 | 1975-02-13 | ||
JPS5013753A (fr) * | 1973-06-11 | 1975-02-13 | ||
JPS604565B2 (ja) * | 1974-11-21 | 1985-02-05 | 富士写真フイルム株式会社 | 耐食性強磁性金属粉末 |
US4051066A (en) * | 1975-01-13 | 1977-09-27 | Northern Instruments Corporation | Corrosion-inhibiting rubber and methods of preparation |
US4233176A (en) * | 1979-05-09 | 1980-11-11 | Conner Alvin James Sen | Non-petroleum based metal corrosion inhibitor |
US4957640A (en) * | 1985-10-15 | 1990-09-18 | The Dow Chemical Company | Corrosion prevention with compositions prepared from organic fatty amines and nitrogen-containing aromatic heterocyclic compounds |
US4705703A (en) * | 1986-06-30 | 1987-11-10 | Nalco Chemical Company | Method of preventing corrosion of uncoated aluminum sheet or beverage cans in a brewery pasteurizer water system |
GB2206129B (en) * | 1987-06-23 | 1991-10-16 | Glaverbel | Decorative mirror and process of manufacturing same |
JPS6473092A (en) * | 1987-09-16 | 1989-03-17 | Daiwa Kasei Kenkyusho | Production of rust-preventive agent for metal |
-
1990
- 1990-05-04 FR FR9005670A patent/FR2661690A1/fr active Pending
- 1990-07-04 EP EP90401929A patent/EP0408423B1/fr not_active Expired - Lifetime
- 1990-07-04 DE DE69012687T patent/DE69012687T2/de not_active Expired - Fee Related
- 1990-07-04 AT AT90401929T patent/ATE111973T1/de not_active IP Right Cessation
- 1990-07-04 ES ES90401929T patent/ES2063308T3/es not_active Expired - Lifetime
- 1990-07-04 DK DK90401929.6T patent/DK0408423T3/da active
- 1990-07-06 US US07/554,691 patent/US5156892A/en not_active Expired - Fee Related
- 1990-07-11 IE IE252790A patent/IE65532B1/en not_active IP Right Cessation
- 1990-07-11 PT PT94667A patent/PT94667B/pt not_active IP Right Cessation
- 1990-07-12 JP JP2185168A patent/JP2835158B2/ja not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3341461A (en) * | 1964-07-24 | 1967-09-12 | C J Webb Inc | Composition for protecting metals against corrosion |
US3382087A (en) * | 1964-08-20 | 1968-05-07 | Pittsburgh Plate Glass Co | Silver and copper coated articles protected by treatment with aminoazole compounds |
GB1183399A (en) * | 1966-10-07 | 1970-03-04 | Hoechst Ag | Liquid Fuels |
Non-Patent Citations (3)
Title |
---|
CHEMICAL ABSTRACTS, vol. 86, no. 20, 16 mai 1977, page 101, résumé no. 141827n, Columbus, Ohio, US; & CZ-A-165 655 (P. MITYSKA et al.) 15-11-1976 * |
CHEMICAL ABSTRACTS, vol. 97, no. 6, 9 août 1982, page 484, résumé no. 46455h, Columbus, Ohio, US; A. RAUSCHER et al.: "Inhibitive effect of some heterocyclic mercaptan derivatives and their relation to parameters describing chemical structure", & KORROZ. FIGY. 1982, 22(2), 27-32 * |
WERKSTOFFE & KORROSION/MATERIALS & CORROSION, vol. 38, no. 11, novembre 1987, pages 649-659, VCH Verlagsgesellschaft mbH, Weinheim, DE; J. PENNINGER et al.: "Molecular structure and efficiency of triazole derivates and other heterocyclics as corrosion inhibitors for copper" * |
Also Published As
Publication number | Publication date |
---|---|
PT94667B (pt) | 1997-02-28 |
IE902527A1 (en) | 1991-02-13 |
PT94667A (pt) | 1991-03-20 |
DE69012687T2 (de) | 1995-03-23 |
EP0408423B1 (fr) | 1994-09-21 |
US5156892A (en) | 1992-10-20 |
ES2063308T3 (es) | 1995-01-01 |
ATE111973T1 (de) | 1994-10-15 |
JP2835158B2 (ja) | 1998-12-14 |
IE65532B1 (en) | 1995-11-01 |
DK0408423T3 (da) | 1995-01-16 |
FR2661690A3 (fr) | 1991-11-08 |
JPH03130383A (ja) | 1991-06-04 |
FR2661690A1 (fr) | 1991-11-08 |
DE69012687D1 (de) | 1994-10-27 |
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