NO151045B - PROCEDURE FOR AND MIXING FOR AA PREVENT CORROSION OF METALS IN CONTACT WITH LIQUID CORROSIVE SYSTEMS - Google Patents
PROCEDURE FOR AND MIXING FOR AA PREVENT CORROSION OF METALS IN CONTACT WITH LIQUID CORROSIVE SYSTEMS Download PDFInfo
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- NO151045B NO151045B NO783851A NO783851A NO151045B NO 151045 B NO151045 B NO 151045B NO 783851 A NO783851 A NO 783851A NO 783851 A NO783851 A NO 783851A NO 151045 B NO151045 B NO 151045B
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- Prior art keywords
- carbon atoms
- quaternary ammonium
- etheramine
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- 230000007797 corrosion Effects 0.000 title claims abstract description 28
- 238000005260 corrosion Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002184 metal Substances 0.000 title claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 12
- 239000007788 liquid Substances 0.000 title claims abstract description 8
- 150000002739 metals Chemical class 0.000 title claims abstract description 7
- 238000002156 mixing Methods 0.000 title abstract description 4
- 150000002429 hydrazines Chemical class 0.000 claims description 23
- 125000004432 carbon atom Chemical group C* 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 20
- -1 ethylene, propylene Chemical group 0.000 claims description 19
- 150000003856 quaternary ammonium compounds Chemical class 0.000 claims description 19
- 239000002253 acid Substances 0.000 claims description 16
- 125000000217 alkyl group Chemical group 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 125000001931 aliphatic group Chemical group 0.000 claims description 5
- 150000001450 anions Chemical group 0.000 claims description 5
- 125000001165 hydrophobic group Chemical group 0.000 claims description 5
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 4
- 125000002768 hydroxyalkyl group Chemical group 0.000 claims description 4
- 125000002947 alkylene group Chemical group 0.000 claims description 3
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 claims description 3
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 3
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical class OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims 1
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 22
- 239000003112 inhibitor Substances 0.000 description 12
- 150000001412 amines Chemical class 0.000 description 11
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 10
- 150000003839 salts Chemical class 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 150000007513 acids Chemical class 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 229940123973 Oxygen scavenger Drugs 0.000 description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 239000012266 salt solution Substances 0.000 description 3
- 125000001424 substituent group Chemical group 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 150000003841 chloride salts Chemical class 0.000 description 2
- 238000001816 cooling Methods 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
- ILRSCQWREDREME-UHFFFAOYSA-N dodecanamide Chemical compound CCCCCCCCCCCC(N)=O ILRSCQWREDREME-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 150000002334 glycols Chemical class 0.000 description 2
- 150000002431 hydrogen Chemical group 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 125000005645 linoleyl group Chemical group 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 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 2
- 125000001117 oleyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([H])\C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000003960 organic solvent Substances 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
- 239000003208 petroleum Substances 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- FJLUATLTXUNBOT-UHFFFAOYSA-N 1-Hexadecylamine Chemical compound CCCCCCCCCCCCCCCCN FJLUATLTXUNBOT-UHFFFAOYSA-N 0.000 description 1
- FTZCHYSHSVRTEG-UHFFFAOYSA-N 1-n-(3-decoxypropyl)propane-1,2-diamine Chemical compound CCCCCCCCCCOCCCNCC(C)N FTZCHYSHSVRTEG-UHFFFAOYSA-N 0.000 description 1
- RDCAZFAKCIEASQ-UHFFFAOYSA-N 3-octoxypropan-1-amine Chemical compound CCCCCCCCOCCCN RDCAZFAKCIEASQ-UHFFFAOYSA-N 0.000 description 1
- HSEMFIZWXHQJAE-UHFFFAOYSA-N Amide-Hexadecanoic acid Natural products CCCCCCCCCCCCCCCC(N)=O HSEMFIZWXHQJAE-UHFFFAOYSA-N 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- JMHWNJGXUIJPKG-UHFFFAOYSA-N CC(=O)O[SiH](CC=C)OC(C)=O Chemical compound CC(=O)O[SiH](CC=C)OC(C)=O JMHWNJGXUIJPKG-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- KIWBPDUYBMNFTB-UHFFFAOYSA-N Ethyl hydrogen sulfate Chemical compound CCOS(O)(=O)=O KIWBPDUYBMNFTB-UHFFFAOYSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000002519 antifouling agent Substances 0.000 description 1
- 239000007798 antifreeze agent Substances 0.000 description 1
- JBIROUFYLSSYDX-UHFFFAOYSA-M benzododecinium chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 JBIROUFYLSSYDX-UHFFFAOYSA-M 0.000 description 1
- 150000001558 benzoic acid derivatives Chemical class 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- WOWHHFRSBJGXCM-UHFFFAOYSA-M cetyltrimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCC[N+](C)(C)C WOWHHFRSBJGXCM-UHFFFAOYSA-M 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- DDXLVDQZPFLQMZ-UHFFFAOYSA-M dodecyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)C DDXLVDQZPFLQMZ-UHFFFAOYSA-M 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000003840 hydrochlorides Chemical class 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 150000002462 imidazolines Chemical class 0.000 description 1
- 239000003701 inert diluent Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 125000001400 nonyl 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])[H] 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 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 1
- 239000010959 steel Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000012749 thinning agent Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 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
- C23F11/14—Nitrogen-containing compounds
- C23F11/145—Amides; N-substituted amides
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)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Fremgangsmåte ved og blanding for å forhindre korrosjon av metaller i kontakt med flytende korrosive systemer.Method by and mixing to prevent corrosion of metals in contact with liquid corrosive systems.
Description
Foreliggende fremgangsmåte vedrører fremgangsmåte av den The present method relates to the method thereof
art som er angitt i krav l's ingress. Mer spesielt vedrører denne en fremgangsmåte for å forhindre korrosjon ved å species specified in claim l's preamble. More particularly, this relates to a method of preventing corrosion by
anvende hydrazinsalter av amidokarboksylsyrer. Oppfinnelsen vedrører også en blanding av den art som er angitt i krav 3's ingress. use hydrazine salts of amidocarboxylic acids. The invention also relates to a mixture of the kind specified in claim 3's preamble.
;F.or å preservere metaller, særlig jernmetaller, i kontakt med korrosive væsker tilsettes korrosjonsinhibitorer til mange systemer innbefattende kjølesystemer, raffineringsenheter, rørledninger, dampgeneratorer, oljefremstillings-enheter etc. In order to preserve metals, especially ferrous metals, in contact with corrosive liquids, corrosion inhibitors are added to many systems including cooling systems, refining units, pipelines, steam generators, oil production units, etc.
Disse forbindelser er filmdannende inhibitorer, dvs. de absorberes på metalloverflater og danner en beskyttende film mellom metallet og det korrosive miljø. Filmdannende inhibitorer av den nevnte type er nyttige mot korrosjon som skyldes uorganiske salter såsom klorider, sulfater, karbonater etc, oppløste gasser såsom karbondioksyd og hydrogensulfid. Konvensjonelle nitrogeninneholdende inhibitorer vil imidlertid ofte ikke virke i systemer inneholdende visse kombinasjoner av oppløste gasser, såsom hydrogensulfid og oksygen, som begge er viktige korro-sjonsfaktorer i væskesystemer særlig innen petroleumsindustrien. These compounds are film-forming inhibitors, ie they are absorbed on metal surfaces and form a protective film between the metal and the corrosive environment. Film-forming inhibitors of the aforementioned type are useful against corrosion caused by inorganic salts such as chlorides, sulphates, carbonates etc., dissolved gases such as carbon dioxide and hydrogen sulphide. However, conventional nitrogen-containing inhibitors will often not work in systems containing certain combinations of dissolved gases, such as hydrogen sulphide and oxygen, both of which are important corrosion factors in liquid systems, particularly within the petroleum industry.
Fra US patent nr. 3.7 70.055 er det kjent å benytte som korrosjonsinhibitorer kombinasjonen av hydrogen og nitrogeninneholdende forbindelser såsom aminer, kvartærnære ammoniumforbindelser eller imidazoliner. From US patent no. 3.7 70,055 it is known to use as corrosion inhibitors the combination of hydrogen and nitrogen-containing compounds such as amines, quaternary ammonium compounds or imidazolines.
En annen type korrosjon er den alvorlige lokaliserte Another type of corrosion is the severe localized one
korrosjon forårsaket av oppløst oksygen, karbondioksyd, hydrogensulfid etc. Eorhindrelse av oksygenkorrosjon vil vanligvis utføres ved anvendelse av pksygenfjernere hvorav de mest vanlige er sulfitter eller ditionitt. Hydrazin kan anvendes som oksygenfjerner men er vanligvis ikke tilfredsstillende da den er ustabil og toksisk. Ytterligere ut- corrosion caused by dissolved oxygen, carbon dioxide, hydrogen sulphide etc. Prevention of oxygen corrosion will usually be carried out by using oxygen scavengers, the most common of which are sulphites or dithionite. Hydrazine can be used as an oxygen scavenger but is usually not satisfactory as it is unstable and toxic. Further out-
viser hydrazin den ulempe at den reagerer langsomt og ikke virker tilfredsstillende ved temperaturer under 50°C. hydrazine shows the disadvantage that it reacts slowly and does not work satisfactorily at temperatures below 50°C.
I henhold til foreliggende oppfinnelse er det funnet at en vesent-lig nedsettelse av korrosjonen av metallstrukturen så som jern-rør etc. kan oppnås ved anvendelse av hydrazinsalter av amidokarboksylsyrer. Disse salter kan innføres i vandige systemer så som kjølesystemer, systemer for hydrostatisk prøvning, vann-injeksjonssystemer ved oljeutvinning etc. og i organiske systemer spesielt hydrokarbonsystemer, så som rørledninger og transport-rørledninger, raffinerienheter og kjemiske prosess-systemer. Foreliggende oppfinnelse vedrører således en fremgangsmåte ved forhindring av korrosjon av metaller i kontakt med væskesystemer og som omfatter og tilfører systemet en effektiv mengde av et hydrazinsalt av en amidokarboksylsyre med den generelle formel According to the present invention, it has been found that a significant reduction in the corrosion of the metal structure such as iron pipes etc. can be achieved by using hydrazine salts of amidocarboxylic acids. These salts can be introduced into aqueous systems such as cooling systems, systems for hydrostatic testing, water injection systems during oil extraction etc. and into organic systems, especially hydrocarbon systems, such as pipelines and transport pipelines, refinery units and chemical process systems. The present invention thus relates to a method for preventing corrosion of metals in contact with liquid systems and which includes and supplies the system with an effective amount of a hydrazine salt of an amidocarboxylic acid with the general formula
R-X-(CH^) COOH hvori X er gruopen R-X-(CH^) COOH where X is the group
zn zn
hvori R er en uforgrenet eller forgrenet hydrokarbongruppe med 5-2 2 karbonatomer, R er hydrogen, en alkylgruppe med 1-4 karbonatomer eller har den samme betydning som R, og n er et heltall fra 1-10, eventuelt i kombinasjon med et eteramin eller en kvarternær amrnoniumforbindelse. in which R is an unbranched or branched hydrocarbon group with 5-2 2 carbon atoms, R is hydrogen, an alkyl group with 1-4 carbon atoms or has the same meaning as R, and n is an integer from 1-10, optionally in combination with an etheramine or a quaternary ammonium compound.
Som eksempler på egnede hydrofobe grupper kan nevnes alkylgrupper såsom oktyl, decyl, heksadecyl, og oktadecyl-grupper, alkylengrupper såsom oleyl og linoleyl samt nat-urlig forekommende blandinger av slike grupper. Eksempler på egnede amidokarboksylsyrer for saltdannelse med hydra- Examples of suitable hydrophobic groups include alkyl groups such as octyl, decyl, hexadecyl and octadecyl groups, alkylene groups such as oleyl and linoleyl as well as naturally occurring mixtures of such groups. Examples of suitable amidocarboxylic acids for salt formation with hydra-
zin er N-metyl, N-karboksymetyl, dodecylamid, ravsyremono- zin is N-methyl, N-carboxymethyl, dodecylamide, succinic mono-
heksadecylamid og adipinsyre N, N-dioktylmonoamid. hexadecylamide and adipic acid N,N-dioctyl monoamide.
Hydrazinsaltene anvendt ved foreliggende fremgangsmåte kan fremstilles ved å blande amidokarboksylsyren og hydrazin ved romtemperatur ved svakt forhøyede temperaturer. Reaksjonsmediet kan være vann og/eller organiske oppløsningsmidler. Som eksempler på oppløsningsmidler kan nevnes lavere alkoholer så som metanol, etanol og isopropylalkohol, glykoler og alifatiske og aromatiske hydrokarboner. Hydrazinsaltene kan innføres som korrosjonsinhibitorer i form av oppløsninger eller dispersjoner med varierende konsentrasjon i inerte fortynningsmidler, i hvilke de fremstilles eller som konsentrater. The hydrazine salts used in the present process can be prepared by mixing the amidocarboxylic acid and hydrazine at room temperature at slightly elevated temperatures. The reaction medium can be water and/or organic solvents. Examples of solvents can be mentioned lower alcohols such as methanol, ethanol and isopropyl alcohol, glycols and aliphatic and aromatic hydrocarbons. The hydrazine salts can be introduced as corrosion inhibitors in the form of solutions or dispersions of varying concentration in inert diluents, in which they are prepared or as concentrates.
Hydrazinsaltene av amidokarboksylsyrene gir en god effekt som følge av de kombinerte egenskaper av korrosjonsinhibering og oksygenfjerning. Det er antatt at effekten kan tilskrives tran-sport av hydrazin til metalloverflåtene ved hjelp av amidokarboksylsyrer hvorved reduserende betingelser dannes på den aktuelle overflate, i motsetning til konvensjonell separat tilsetning av en oksygenfjerner til korrosive systemer. Introduksjon av hydrazin i form av en forbindelse senker i betydelig grad toksisi-tetsproblemene forbundet med anvendelse av hydrazin, ved at hydrazinets damptrykk nedsettes. The hydrazine salts of the amidocarboxylic acids provide a good effect as a result of the combined properties of corrosion inhibition and oxygen removal. It is believed that the effect can be attributed to the transport of hydrazine to the metal surfaces by means of amidocarboxylic acids whereby reducing conditions are formed on the relevant surface, in contrast to the conventional separate addition of an oxygen scavenger to corrosive systems. Introduction of hydrazine in the form of a compound significantly lowers the toxicity problems associated with the use of hydrazine, by lowering the hydrazine's vapor pressure.
Det kan også være til stede et molart overskudd av hydrazin A molar excess of hydrazine may also be present
eller av amidokarboksylsyren for visse systemer for å for- or of the amidocarboxylic acid for certain systems to for-
sterke effekten. Hydrazin er passende til stede i et over- strong effect. Hydrazine is suitably present in an over-
skudd på minst 0,1 mol i forhold til amidokarboksylsyren og fortrinnsvis i et molart overskudd i området 0,1-1 mol. shot of at least 0.1 mol in relation to the amidocarboxylic acid and preferably in a molar excess in the range 0.1-1 mol.
Selv om hydrazinsaltene som sådanne gir en tilfredstillende beskyttelse er det funnet at effekten kan forsterkes betydelig ved tilstedeværelsen av et amin eller en kvartærnær amrnoniumforbindelse og dette utgjør et annet trekk ved oppfinnelsen. Aminene kan være primære, sekundære eller tertiære eller kan Although the hydrazine salts as such provide satisfactory protection, it has been found that the effect can be significantly enhanced by the presence of an amine or a quaternary ammonium compound and this constitutes another feature of the invention. The amines may be primary, secondary or tertiary or may
være mono-, di- eller trieteraminer. Aminene og de kvartære ammoniumforbindelser inneholder passende minst en hydrofob organisk gruppe med 6 karbonatomer eller flere. Aminene og de kvartærnære ammoniumforbindelser kan være substituerte med be mono-, di- or trietheramines. The amines and quaternary ammonium compounds suitably contain at least one hydrophobic organic group of 6 or more carbon atoms. The amines and the quaternary ammonium compounds may be substituted with
hydroksyalkylgrupper eller kan være alkoksyalkylert. hydroxyalkyl groups or may be alkoxyalkylated.
Fremgangsmåten ifølge oppfinnelsen omfatter også tilsetning til korrosive systemer et hydrazinsalt av en amidokarboksylsyre, som ovenfor definert, i kombinasjon med et amin eller en kvartærnær ammoniumforbindelse. Aminet eller den kvartærnære ammoniumforbindelse er tilstede i et molforhold på minst 1:20 i forhold til hydrazinsaltet og fortrinnsvis i molforholdet 1:10 til 10:10. The method according to the invention also includes adding to corrosive systems a hydrazine salt of an amidocarboxylic acid, as defined above, in combination with an amine or a quaternary ammonium compound. The amine or quaternary ammonium compound is present in a molar ratio of at least 1:20 relative to the hydrazine salt and preferably in a molar ratio of 1:10 to 10:10.
Kvartærnære ammoniumforbindelser som anvendes i forbindelse med saltene kan representeres av den generelle formel Quaternary ammonium compounds used in connection with the salts can be represented by the general formula
hvori R er en uforgrenet eller forgrenet alifatisk hydrokarbongruppe med 6-22 karbonatomer, og hvor R2 uavhengig er alkyl- eller hydroksyalkylgrupper med 1-4 karbonatomer eller benzylgrupper og X er en anion. Det foretrukne anion i det kvartærnære anion av den kvartærnære forbindelse er klorid, men dette kan naturligvis erstattes av et annet anion så som et bromid-, etylsulfation, etc. Som eksempler på egnede kvartærnære ammoniumforbindelser kan nevnes dioktyldimetylammoniumklorid, dodecyltrimetylammoniumklorid, cetyltrimetylammoniumklorid, cetyltrimetylammoniumbromid, dodecyldimetylbenzylammoniumklorid, etc. Spesielt gode re-sultater er erholdt med kvartærnære ammoniumforbindelser inneholdende en organisk hydrofob gruppe og en benzylgruppe, de andre substituentene er hydroksyalkyl eller alkylgrupper med 1-4 karbonatomer. wherein R is an unbranched or branched aliphatic hydrocarbon group of 6-22 carbon atoms, and wherein R 2 is independently alkyl or hydroxyalkyl groups of 1-4 carbon atoms or benzyl groups and X is an anion. The preferred anion in the quaternary anion of the quaternary compound is chloride, but this can of course be replaced by another anion such as a bromide, ethylsulfate, etc. As examples of suitable quaternary ammonium compounds can be mentioned dioctyldimethylammonium chloride, dodecyltrimethylammonium chloride, cetyltrimethylammonium chloride, cetyltrimethylammonium bromide, dodecyldimethylbenzylammonium chloride , etc. Particularly good results have been obtained with quaternary ammonium compounds containing an organic hydrophobic group and a benzyl group, the other substituents being hydroxyalkyl or alkyl groups with 1-4 carbon atoms.
Aminene som anvendes i kombinasjon med saltene er eteraminer med den generelle formel hvori R er en forgrenet eller uforgrenet alifatisk hydrokarbongruppe med 6-22 karbonatomer, a er et heltall i området 1-5, n er et heltall i området 2-10, p er 0, 1 eller 2, og q er 0 eller 1, med det forbehold at q er 0 når p er 2, gruppene X er uavhengig av hverandre hydrogen, en alkylgruppe med 1-4 karbonatomer eller gruppen (alkylen-0) H, hvor y er et heltall i området 1-10 og alkylen har betydningen etylen , propylen eller isopropylen. The amines used in combination with the salts are ether amines with the general formula in which R is a branched or unbranched aliphatic hydrocarbon group with 6-22 carbon atoms, a is an integer in the range 1-5, n is an integer in the range 2-10, p is 0, 1 or 2, and q is 0 or 1, with the proviso that q is 0 when p is 2, the groups X are independently hydrogen, an alkyl group of 1-4 carbon atoms or the group (alkylene-0) H, where y is an integer in the range 1-10 and alkylene means ethylene, propylene or isopropylene.
Eteraminene kan anvendes som frie aminer eller i form av vann-oppløslige salter så som klorider, hydroklorider, fosfater, sulfitter, acetater, benzoater etc. De anvendes fortrinnsvis som frie aminer eller som sulfitter eller bisulfitter. The ether amines can be used as free amines or in the form of water-soluble salts such as chlorides, hydrochlorides, phosphates, sulphites, acetates, benzoates etc. They are preferably used as free amines or as sulphites or bisulphites.
Særlig foretrukne er eteraminer som kan representeres ved den generelle formel Particularly preferred are etheramines which can be represented by the general formula
hvori substituentene og heltallene har de ovenforgitte betydninger. wherein the substituents and the integers have the meanings given above.
Den organisk hydrofobe gruppe er passende en uforgrenet eller forgrenet alifatisk hydrokarbongruppe inneholdende 6-22 karbonatomer, fortrinnsvis 8-18 karbonatomer, og mere foretrukket 8-12 karbonatomer. The organic hydrophobic group is suitably an unbranched or branched aliphatic hydrocarbon group containing 6-22 carbon atoms, preferably 8-18 carbon atoms, and more preferably 8-12 carbon atoms.
Som eksempler på egnede grupper kan nevnes alkylgrupper så som heptyl, oktyl, nonyl, decyl, dodecyl, heksadecyl, oktodecyl, 2-etylheksyl, 2-etyl-4-metyl-pentyl, isononyl, isodecyl, iso-tridecyl isoheksadecyl, isooctadecyl,og alkenylgrupper så som oleyl og linoleyl. De organiske hydrofobe grupper kan være blandinger av naturlige forekommende grupper. I gruppene (0-alkylen) vil det forstås at disse kan inneholde blandinger av etylen-, propylen- og isopropylengrupper. As examples of suitable groups, mention can be made of alkyl groups such as heptyl, octyl, nonyl, decyl, dodecyl, hexadecyl, octodecyl, 2-ethylhexyl, 2-ethyl-4-methyl-pentyl, isononyl, isodecyl, iso-tridecyl isohexadecyl, isooctadecyl, and alkenyl groups such as oleyl and linoleyl. The organic hydrophobic groups can be mixtures of naturally occurring groups. In the groups (O-alkylene), it will be understood that these may contain mixtures of ethylene, propylene and isopropylene groups.
Substituenten X i eteraminene representerer passende hydrogen eller alkoksygrupper hvor y er 1 - 10, fortrinnsvis er X hydrogen. Heltallet a er fortrinnsvis 1 eller 2 og m er fortrinnsvis 0 når a er 1 og 0 eller 1 når a er større enn 1. Heltallet n er fortrinnsvis 2 eller 3. The substituent X in the ether amines represents suitable hydrogen or alkoxy groups where y is 1 - 10, preferably X is hydrogen. The integer a is preferably 1 or 2 and m is preferably 0 when a is 1 and 0 or 1 when a is greater than 1. The integer n is preferably 2 or 3.
Eksempler på egnede eteraminer er 3-oktoksypropylamin, N(3-oktoksy-propyl)propylendiamin, N-(3-dekoksypropyl)propylendiamin, N-(3-dodekoksypropyl)propylendiamin, N(2-oktokstetyl)etylendiamin. Examples of suitable etheramines are 3-octoxypropylamine, N(3-octoxypropyl)propylenediamine, N-(3-decoxypropyl)propylenediamine, N-(3-dodecoxypropyl)propylenediamine, N(2-octoxyethyl)ethylenediamine.
og N(2-dekoksyetyl)etyldiamin. and N(2-decoxyethyl)ethyldiamine.
Kombinasjoner av hydrazinsalt av amidokarboksylsyrer og eteraminer anvendes fortrinnsvis ved fremgangsmåten. Ved siden av den spesielt gode korrosjonsinhiberende effekt av kombinasjonen utviser eteraminer fordelaktige blandbarhets- og oppløslighets egenskaper og de utviser også nyttige bakteriside egenskaper. Combinations of hydrazine salts of amidocarboxylic acids and etheramines are preferably used in the process. In addition to the particularly good corrosion-inhibiting effect of the combination, ether amines exhibit advantageous miscibility and solubility properties and they also exhibit useful bactericidal properties.
1 en spesiell utførelsesform av foreliggende oppfinnelse anvendes amidokarboksylsyresaltene i forbindelse med sulfitter eller bisulfitter av eteraminer. Sulfitten av eteraminer har gode reduserende egenskaper og gir utmerket beskyttelse mot lokal-korrosjon. Disse forbindelser kan fremstilles ved å omsette svoveldioksyd eller svovelsyrling med eteraminene i vann, alko- In a particular embodiment of the present invention, the amidocarboxylic acid salts are used in connection with sulfites or bisulfites of etheramines. The sulphite of etheramines has good reducing properties and provides excellent protection against local corrosion. These compounds can be prepared by reacting sulfur dioxide or sulfuric acid with the ether amines in water, alcohol
hol eller blandinger av disse ved romtemperatur eller ved svakt forhøyede temperaturer. Eteraminene kan omsettes med 1 mol- hol or mixtures thereof at room temperature or at slightly elevated temperatures. The ether amines can be reacted with 1 mol-
eller mindre av S09, ^SO^ pr. nitrogenatom i aminet. or less of S09, ^SO^ per nitrogen atom in the amine.
Kombinasjonen av hydrazinsalt av amidokarboksylsyren og eter- The combination of the hydrazine salt of the amidocarboxylic acid and the ether-
arain eller den kvartærnære ammoniumforbindelse kan tilsettes til et korrosivt system i form av oppløsninger eller disper- arain or the quaternary ammonium compound can be added to a corrosive system in the form of solutions or dispers
sjoner i vann og/eller organisk oppløsningsmidler. Som eksempler på oppløsningsmidler kan nevnes lavere alkoholer så tions in water and/or organic solvents. As examples of solvents, lower alcohols can be mentioned
som metanol, etanol og isopropylalkohol, glykoler og alifatiske og aromatiske hydrokarboner. Blanding av bestanddelene i for- such as methanol, ethanol and isopropyl alcohol, glycols and aliphatic and aromatic hydrocarbons. Mixing the ingredients in the pre-
tynningsmiddelet kan utføres ved romtemperatur eller svakt for-høyede temperaturer. the thinning agent can be carried out at room temperature or slightly elevated temperatures.
Oppfinnelsen vedrører også blandinger for å forhindre korrosjon The invention also relates to compositions for preventing corrosion
av metaller og blandingene omfatter de ovenfornevnte hydrazinsalter av amido-karboksylssaltet i kombinasjon med de ovenfornevnte eteraminer eller kvartærnære ammoniumforbindelser. Eteraminene eller de kvartærnære ammoniumforbindelser er passende tilstede i blandingen i en molar mengde i forhold til hydrazinsaltet på minst 1:20 fortrinnsvis innen det molare området 1:5 of metals and the mixtures comprise the above-mentioned hydrazine salts of the amido-carboxyl salt in combination with the above-mentioned etheramines or quaternary ammonium compounds. The ether amines or quaternary ammonium compounds are suitably present in the mixture in a molar amount relative to the hydrazine salt of at least 1:20, preferably within the molar range of 1:5
til 5:1. Blandingen er særpreget ved det som er anaitt i krav 3's karakteriserende del. to 5:1. The mixture is characterized by what is stated in claim 3's characterizing part.
Mengden av hydrazinsalter eller av aktive bestanddeler i blandinger inneholdende disse er nødvendig for en tilfredstillende beskyttelse varierer naturligvis med systemets korrosivitet. Fremgangsmåte for å bestemme graden av korrosjon i forskjellige systemer er velkjente og tjener som basis for å bestemme den effektive mengde. Hydrazinsaltene gir en betydelig nedsettelse av korrosjonen når de er tilstede i en mengde på 1 ppm, regnet på vekten av den korrosive væske. Den øvre grense er ikke kritiske men er avhengig av den spesielt anvendte forbindelse og det spesielle system. Mengder på opptil over 1000 ppm kan anvendes men fortrinnsvis holdes konsentrasjonen i området 1 - 200 ppm. The amount of hydrazine salts or of active ingredients in mixtures containing these required for satisfactory protection naturally varies with the corrosivity of the system. Procedures for determining the degree of corrosion in various systems are well known and serve as a basis for determining the effective amount. The hydrazine salts give a significant reduction in corrosion when they are present in an amount of 1 ppm, calculated on the weight of the corrosive liquid. The upper limit is not critical but depends on the particular connection used and the particular system. Amounts of up to over 1000 ppm can be used, but the concentration is preferably kept in the range 1 - 200 ppm.
Hydrazinsaltet ifølge foreliggende oppfinnelse og blandinger inneholdende disse er spesielt nyttige i forskjellige områder innen oljeutvinning og petroleumsindustrien. Den kan anvendes i primære, sekundære og tertiære oljeutvinning og tilsettes på i og for seg kjent måte. De kan også innarbeides i vannoppløslige kapsler som innføres i brønner hvori kapslene oppløses og inhibitoren langsom frigjøres inn i det korrosive fluidum. En annen teknikk er primæroljeutvinning hvor foreliggende salter kan anvendes ved utpresningsteknikk hvorved de injiseres under trykk inne i den produserende formasjon og desorberes når fluida produseres. De kan ytteligere tilsettes ved vanninjeksjons-operasjoner ved sekundæroljeutvinning så vel som til rørledninger, transportrørledninger og i raffineringsenheter. Hydrazinsaltene ifølge oppfinnelsen kan anvendes i kombinasjon med velkjente in-hibitorer og oksygenfjernere og også i kombinasjon med til-setningsmidler som generelt anvendes innen dette felt, så som anti-frysemidler, anti-begroningsmidler, overflateaktivemidler så som ikke-ioniske dispergeringsmidler og gelat-dannende midler. The hydrazine salt according to the present invention and mixtures containing these are particularly useful in various areas within oil extraction and the petroleum industry. It can be used in primary, secondary and tertiary oil extraction and added in a manner known per se. They can also be incorporated into water-soluble capsules that are introduced into wells in which the capsules dissolve and the inhibitor is slowly released into the corrosive fluid. Another technique is primary oil extraction, where the present salts can be used by a squeeze-out technique whereby they are injected under pressure inside the producing formation and desorbed when the fluids are produced. They can additionally be added in water injection operations in secondary oil recovery as well as to pipelines, transport pipelines and in refining units. The hydrazine salts according to the invention can be used in combination with well-known inhibitors and oxygen scavengers and also in combination with additives which are generally used in this field, such as anti-freeze agents, anti-fouling agents, surfactants such as non-ionic dispersants and gel-forming agents funds.
Oppfinnelsen skal ytteligere illustreres under henvisning til de etterfølgende eksempler. The invention shall be further illustrated with reference to the following examples.
Eksempel 1 Example 1
Et hydrazinsalt av N-metyl, N-karboksymetyloleylamid ble fremstilt ved å oppløse 20 g av amidosyren i 50 g isopropanol og 25 g vann. 1,75 g hydrazin ble oppløst i 3,25 g vann ble tilsatt og det ble erholdt en klar oppløsning av hydrazinsaltet. A hydrazine salt of N-methyl, N-carboxymethyloleylamide was prepared by dissolving 20 g of the amido acid in 50 g of isopropanol and 25 g of water. 1.75 g of hydrazine was dissolved in 3.25 g of water was added and a clear solution of the hydrazine salt was obtained.
Eksempel 2 Example 2
Korrosjonsprøve Corrosion test
Produktet ifølge eksempel 1 og separate bestanddeler av det bland-ede produkt så vel som det tilsvarende natriumsalt og et antall andre inhibitorer ble undersøkt. Alle inhibitorblandinger ble fremstilt i isopropanol og vann som oppløsningsmiddel. The product of Example 1 and separate components of the mixed product as well as the corresponding sodium salt and a number of other inhibitors were investigated. All inhibitor mixtures were prepared in isopropanol and water as solvent.
Dosen i ppm henviser seg til den aktive del av inhibitoren dvs. oppløsningsmiddelet er ikke medregnet. The dose in ppm refers to the active part of the inhibitor, i.e. the solvent is not included.
Prøvemetode Test method
50 ml råolje og 950 ml saltoppløsning, med den etterfølgende sammensetning ble fyllt i en 1000 ml E-flaske. 50 ml of crude oil and 950 ml of salt solution, with the following composition were filled into a 1000 ml E-bottle.
Blandingen ble kraftig omrørt og CO,, boblet gjennom i 15 min The mixture was vigorously stirred and CO 2 bubbled through for 15 min
til å gi en blanding mettet med hensyn til C02 og med et oksygen innhold mindre enn 0.5 ppm. Temperaturen ble holdt ved 2 5°C. to give a mixture saturated with respect to C02 and with an oxygen content of less than 0.5 ppm. The temperature was maintained at 25°C.
Et polarisasjonsmotstandsinstrument ("Magna Corrater") forsynt med 1010 myke stålelektroder ble anvendt for korrosjonsmålingene. Slutten av 15 min perioden ble elektrodene innført i salt-oppløsningen. Etter 1 h stabilisering av korrosjonshastigheten ble en korrosjonsavlesning (CA) notert hvoretter inhibitoren ble tilsatt. Etter ytteligere 6 h ble den endelige korrosjonsavlesning (Cg) notert. Under prøven ble saltoppløsningen mettet med hensyn til C02 ved kontinuerlig å injisere C02 til oppløsningen. A polarization resistance instrument ("Magna Corrater") equipped with 1010 soft steel electrodes was used for the corrosion measurements. At the end of the 15 min period, the electrodes were introduced into the salt solution. After 1 h stabilization of the corrosion rate, a corrosion reading (CA) was noted after which the inhibitor was added. After a further 6 h, the final corrosion reading (Cg) was noted. During the test, the salt solution was saturated with CO 2 by continuously injecting CO 2 into the solution.
Da forskjellige elektroder gir forskjellige initsial korrosjons-avlesninger ble den relative korrosjonshastighet ved slutten av forsøksperioden beregnet, As different electrodes give different initial corrosion readings, the relative corrosion rate at the end of the test period was calculated,
I tabellen er de følgende forkortelser anvendt: In the table, the following abbreviations are used:
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7712954A SE408915B (en) | 1977-11-16 | 1977-11-16 | METHOD TO PREVENT CORROSION OF METALS IN CONTACT WITH CORROSIVE LIQUID SYSTEMS AND MEASURES FOR IMPLEMENTING THE KIT |
| SE7712957A SE408918B (en) | 1977-11-16 | 1977-11-16 | CORROSION INHIBITING COMPOSITION |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO783851L NO783851L (en) | 1979-05-18 |
| NO151045B true NO151045B (en) | 1984-10-22 |
| NO151045C NO151045C (en) | 1985-02-06 |
Family
ID=26656909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO783851A NO151045C (en) | 1977-11-16 | 1978-11-15 | PROCEDURE FOR AND MIXING FOR AA PREVENT CORROSION OF METALS IN CONTACT WITH LIQUID CORROSIVE SYSTEMS |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2028810B (en) |
| NO (1) | NO151045C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0070168B1 (en) * | 1981-07-13 | 1985-04-10 | RAYCHEM CORPORATION (a California corporation) | Protecting metal substrates from corrosion |
| IL79624A0 (en) * | 1986-08-05 | 1986-11-30 | Yeda Res & Dev | Amphiphilic amides and films produced from these |
| FR2738018B1 (en) | 1995-08-24 | 1997-09-26 | Ceca Sa | INHIBITION OF CARBON CORROSION OF STEEL BY N-ALCOYL-SARCOSINES |
-
1978
- 1978-11-15 NO NO783851A patent/NO151045C/en unknown
- 1978-11-16 GB GB7844782A patent/GB2028810B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2028810B (en) | 1982-08-25 |
| NO783851L (en) | 1979-05-18 |
| NO151045C (en) | 1985-02-06 |
| GB2028810A (en) | 1980-03-12 |
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