DE2426613A1 - CORROSION INHIBITION - Google Patents
CORROSION INHIBITIONInfo
- Publication number
- DE2426613A1 DE2426613A1 DE19742426613 DE2426613A DE2426613A1 DE 2426613 A1 DE2426613 A1 DE 2426613A1 DE 19742426613 DE19742426613 DE 19742426613 DE 2426613 A DE2426613 A DE 2426613A DE 2426613 A1 DE2426613 A1 DE 2426613A1
- Authority
- DE
- Germany
- Prior art keywords
- polymer
- zinc
- corrosion
- works
- molecular weight
- 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.)
- Ceased
Links
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
Description
CALGON CORPORATION
Robinson Township, Allegheny County, Pennsylvania, V.St.A.CALGON CORPORATION
Robinson Township, Allegheny County, Pennsylvania, V.St.A.
Postanschrift: P.O.BoxPostal address: P.O.Box
Pitssburgh, Pa. V.St.A.Pitssburgh, Pa. V.St.A.
Korro sionsinhibi erungCorrosion inhibition
Die Erfindung betrifft die Inhibierung von Korrosion in Wassersystemen, die mit sauerstoff haitigern Wasser arbeiten.The invention relates to the inhibition of corrosion in water systems that work with water containing oxygen.
Korrosion durch Sauerstoff stellt naturgemäss in jeglichem Wassersystem, das Metall aufweist, ein ernsthaftes Problem dar. Von besonderer Bedeutung ist auf Grund der ausgedehnten Verwendung in vielen Arten von Wassersystemen die Korrosion von Eisen und Stahl. Auch Kupfer und dessen Legierungen, Aluminium und dessen Legierungen und verzinkter Stahl werden in Wassersystemen eingesetzt und unterliegen Korrosion. Es wurden nunmehr neue Korrosionsinhibitoren gefunden, die Korrosion durch Sauerstoff in solche Metalle aufweisenden Wassersystemen inhibieren.Corrosion from oxygen is inherently a serious problem in any water system that contains metal Of particular concern because of its widespread use in many types of water systems is corrosion of iron and steel. Copper and its alloys, aluminum and its alloys and galvanized steel are also used used in water systems and are subject to corrosion. New corrosion inhibitors have now been found, corrosion by oxygen in water systems containing such metals.
Es wurde gefunden, dass Mittel, die niedermolekulares PoIy-It has been found that agents producing low molecular weight
- 1 409881/1125 - 1 409881/1125
meres und Zink enthalten, wirksame Korrosionsinhibitoren darstellen. Zu solchen Polymeren gehören wasserlösliche Salze von Acrylsäure, Acrylate, Methacrylate, nichthydrolysierte oder partiell hydrolysierte Acrylamide und Acrylamidomethylpropansulfonate. Die Polymeren können die Form von Homo-, Co- oder Terpolymeren aller vorgenannten Polymeren haben und können ein Molekulargewicht von etwa 500 bis 10 000 aufweisen. Vorzugsweise beträgt das Molekulargewicht etwa 1000. Zu den wasserlöslichen Salzen gehören die Alkali-, Erdalkali-, Zink-, Kobalt-, Ammonium- oder Amino- und Niedermol-alkanolamin-Salze. contain meres and zinc, are effective corrosion inhibitors. Such polymers include water-soluble salts of acrylic acid, acrylates, methacrylates, non-hydrolyzed or partially hydrolyzed acrylamides and acrylamidomethyl propane sulfonates. The polymers can take the form of homo-, co- or terpolymers of any of the aforementioned polymers and can have a molecular weight of about 500 to 10,000. The molecular weight is preferably about 1000. The water-soluble salts include the alkali, alkaline earth, Zinc, cobalt, ammonium or amino and low molar alkanolamine salts.
Das Zink-Ion kann auf vielen Wegen vorgelegt werden. Man kann es z. B. durch Einsatz eines wasserlöslichen Zinksalzes zuführen, wie Zinkchlorid-f -acetat, -nitrat und.-sulfat, das in wässriger Lösung Zink-Ionen bildet. Das Zink-Ion lässt sich auch durch unmittelbaren Zusatz von Zink zu einer Lösung des Polymeren vorlegen.The zinc ion can be presented in many ways. You can z. B. by using a water-soluble zinc salt, such as zinc chloride f -acetate, nitrate and.-sulfate, which forms zinc ions in aqueous solution. The zinc ion can also be introduced into a solution of the polymer by directly adding zinc.
Die korrosionsinhi bierenden Mittel können Polymeres und Zink, im Gewichtsverhältnis zueinander von etwa 1 : 3 his 5*1 enthalten, wobei ein Bereich von etwa 3 * 1 his 4:1 bevorzugt wird. Venn diese Mittel in einer Konzentration von mindestens etwa 1 ppm (Teile je Million Teile) bei den vorstehenden Verhältnissen im Wassersystem gehalten werden, wird Korrosion von Metallen wirksam inhibiert, wobei eine Konzentration von etwa 5 his 50 ppm bevorzugt wird. Maximalkonzentrationen richten sich nach den wirtschaftlichen Erwägungen im gegebenen Anwendungsfall.The anti-corrosive agents can be polymer and zinc, in a weight ratio of about 1: 3 to 5 * 1 included, with a range of about 3 * 1 to 4: 1 preferred will. Use these agents at a concentration of at least about 1 ppm (parts per million) in the foregoing Conditions in the water system are maintained, corrosion of metals is effectively inhibited, with a concentration of about 5 to 50 ppm is preferred. Set maximum concentrations according to the economic considerations in the given application.
Burch Zusatz von Verbindungen in Art von Benzotriazol oder Mercaptobenzothiazol in verschiedenen Mengen zu der fertigen Formulierung lässt sich deren Wert für eine breitere Vielfalt technischer Zwecke, bei denen sowohl Stahl als auch Kupfer oder seine Legierungen in dem gleichen System vorliegen, noch steigern.By adding compounds such as benzotriazole or Mercaptobenzothiazole in various amounts to the finished product Its formulation can be used for a wider variety of engineering purposes involving both steel and copper or its alloys are in the same system.
— 2 — 409881/1125 - 2 - 409881/1125
Die folgende Tatelle erläutert die Wirksamkeit von Polyacrylsäure (Molekulargewicht etwa 1000) und eines partiell hydrolysierten Polyacrylamide (Molekulargewicht etwa 7000) beim Einsatz mit und ohne Zink bei den genannten Dosierungen und pH-Werten.The following table illustrates the effectiveness of polyacrylic acid (molecular weight about 1000) and a partially hydrolyzed one Polyacrylamides (molecular weight approx. 7000) when used with and without zinc at the stated dosages and pH values.
Zur Prüfung diente ein unter kontinuierlicher Eintauchung und schwacher Bewegung verlaufender Standard-5-Tage-Test, der in künstlichem llPittsburgh"-Leitungswasser 5 Tage bei 35° C (95° ^1) durchgeführt wurde. Die Stärke der Stahl-Korrosion ist in der folgenden Tabelle genannt.A standard 5-day, continuous immersion, gentle agitation test was performed in Pittsburgh artificial tap water for 5 days at 35 ° C (95 ° ^ 1 ). The strength of the steel corrosion is in in the following table.
Werte der als Gewichtsverlust ausgedrückten Korrosionsstärke für Polymere von Polyacrylsäure und partiell hydrolysiertem Polyacrylamid mit und ohne Zink Corrosion strength values expressed as weight loss for polymers of polyacrylic acid and partially hydrolyzed polyacrylamide with and without zinc
stärke, MDTx; Correction \
strength, MDT x;
säure lysiertes Poly
acrylamid, ppmPolyacrylic - partially hydro-
acid lysed poly
acrylamide, ppm
' MDT - mg "verbrauchter" Stahl pro Quadratdezimeter pro Tag ' MDT - mg of steel "used" per square decimeter per day
Die folgende Tabelle erläutert den Einfluss des Verhältnisses des Polymeren zu Zink an verschiedenen korrosionsinhibierenden Mitteln gemäss der Erfindung. Die Prüfungen erfolgten in künstlichem "Pittsburgn-Wasser in Polarisationsprüfzellen mit Stahlelektroden bei einem pH-Anfangswert von 7,0. Die Inhibitor-Konzentrationen .wurden auf Basis des aktiven Materials berechnet. Der eingetretene Korrosionsbetrag wurdeThe following table explains the influence of the ratio of the polymer to zinc on various corrosion-inhibiting agents according to the invention. The tests were carried out in artificial Pittsburg n water in polarization test cells with steel electrodes at an initial pH of 7.0. The inhibitor concentrations were calculated on the basis of the active material. The amount of corrosion that occurred was calculated
, - 3 -409881/1125, - 3 -409881/1125
ermittelt aus der Stromdichte an der Kreuzungsstelle des extrapolierten sogenannten *Tafelw-Teils der Kurve anodischer Polarisation mit dem Gleichgewichts- oder "Misch"-Potentialwert (gewöhnlich als Korrosionspotential, ΜΕΛΛΤ< ", bezeichnet). Durch Anwendung des Faraday1 sehen Gesetzes ist eine direkte mathematische Beziehung zwischen der Stromdichte bei Ε_Λ__, ausgedrückt in A/cm , und einem zweckmassigeren Ausdruck für die Korrosions stärke, wie in Form von mg "verbrauchtem" Stahl pro dm Oberfläche pro Tag (MDT) und von mm/Jahr, berechenbar, wobei dieser Beziehung entsprechend ein Stromdichte-Wert von 4,0 χ 10 ' A/cm gleich 1,0 mg/dm /Tag ist. Weiter wird der in mm/Jahr ausgedrücktedetermined from the current density at the intersection of the extrapolated so-called * table w part of the curve of anodic polarization with the equilibrium or "mixed" potential value (usually referred to as corrosion potential, Μ Ε ΛΛΤ < "). By applying Faraday 1 see law is a direct mathematical relationship between the current density at Ε_ Λ __, expressed in A / cm, and a more convenient expression for the corrosion strength, such as mg "used" steel per dm surface per day (MDT) and mm / year , calculable, with a current density value of 4.0 χ 10 'A / cm being equal to 1.0 mg / dm / day in accordance with this relationship, and that expressed in mm / year
Wert nach der üblichen Formel mm/Jahr » MDT χ 0,0254 χ ^iSteValue according to the usual formula mm / year »MDT χ 0.0254 χ ^ iSte
berechnet, wobei man für Stahl einen Dichte-Wert von 7»87 einsetzt. Die Korrosionsstärke von Stahl in diesem Wasser ohne Inhibitor beträgt 100 MDT. Dieser Kontrollwert gilt für beide Tabellen II und III.calculated using a density value of 7 »87 for steel begins. The corrosion strength of steel in this water without an inhibitor is 100 MDT. This control value applies for both Tables II and III.
409881/ 112S409881 / 112S
, ■ ; ■ ■ ■ , Tabelle II ; ■ ; . ' ■ .. ■ . ■ : ■, ■ ; ■ ■ ■, Table II ; ■; . '■ .. ■. ■ : ■
Polarisations-KOrrosionsstärke-Werte zur Erläuterung; dee Einflusses verschiedener Gewichtsverhältnisse von Polymerem zu Zink . Polarization corrosion strength values for explanation; the influence of different weight ratios of polymer to zinc .
Gewichtsverhältnis -Weight ratio -
Polymeres zu Zink —^ 1:2 1 : 1 2 i 1 5 s 1 4 : 1 5 : 1 Polymer to zinc - ^ 1: 2 1: 1 2 i 1 5 s 1 4: 1 5: 1
Polymer-Dosierung, 1Q ,q 1qo ^0 ™ 1<χ) 10 ,q 1oo 10 ,g 100 10 »q 10 Polymer dosage, 1Q , q 1qo ^ 0 ™ 1 <χ) 10 , q 1oo 10 , g 100 10 »q 10
HDT, bei Einsatz
des folgenden
Polymeren:Corrosion Strength,
HDT, when in use
of the following
Polymers:
siert es Polyacryl
amid -iartiell hydroly
it is polyacrylic
amide -
jrojLymeren:jrojLymeren:
54 17 42 38 3 17 6 30 754 17 42 38 3 17 6 30 7
1 28 14 15861 28 14 1586
>o « siertes Polyacryl- · O»a > o «sated polyacrylic · O» a
.- — 32 3 — 67 3 ~ 51 66 80 $6 ·- - 32 3 - 67 3 ~ 51 66 80 $ 6 ·
N)N)
N) (J) N) (J)
cncn
—λ-Λ
coco
4-4-
Vie die folgende Tabelle erläutert, nimnt sit »unehmendea Molekulargewicht die Wirksamkeit poljmerer Korrosionsinhibitoren ab:As the following table explains, there is nothing wrong with it Molecular weight determines the effectiveness of polymeric corrosion inhibitors:
!Tabelle III ■Polarisatione-Korro sionsstärke-Wertefür ! Table III ■ Polarization Corrosion Strength Values for
409881/1125409881/1125
Claims (22)
arbeitet.22. The method according to claim 21, characterized in that with a ratio of about 3 J 1 to 4: 1
is working.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US367083A US3885914A (en) | 1973-06-04 | 1973-06-04 | Polymer-zinc corrosion inhibiting method |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2426613A1 true DE2426613A1 (en) | 1975-01-02 |
Family
ID=23445866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19742426613 Ceased DE2426613A1 (en) | 1973-06-04 | 1974-05-31 | CORROSION INHIBITION |
Country Status (10)
Country | Link |
---|---|
US (1) | US3885914A (en) |
JP (1) | JPS5759308B2 (en) |
AU (1) | AU6918274A (en) |
BE (1) | BE815848A (en) |
CA (1) | CA1032746A (en) |
DE (1) | DE2426613A1 (en) |
FR (1) | FR2231778B1 (en) |
GB (1) | GB1455343A (en) |
LU (1) | LU70236A1 (en) |
NL (1) | NL7406599A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2807222A1 (en) * | 1977-10-25 | 1979-04-26 | Buckman Labor Inc | SYNERGISTIC COMPOSITIONS FOR CONTROLLING CORROSION AND DEPOSITION |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4018701A (en) * | 1975-07-31 | 1977-04-19 | Calgon Corporation | Phosphorous acid and zinc corrosion inhibiting compositions and methods for using same |
DE2653933A1 (en) * | 1976-11-27 | 1978-06-01 | Henkel Kgaa | USE OF CYCLOHEXANEHEXACARBONIC ACID AS A CORROSION INHIBITOR FOR DOMESTIC WATER SYSTEMS |
US4324684A (en) * | 1979-10-29 | 1982-04-13 | Betz Laboratories, Inc. | Stable compositions for use as corrosion inhibitors |
US4411865A (en) * | 1979-04-05 | 1983-10-25 | Betz Laboratories, Inc. | Method of corrosion inhibition in aqueous mediums |
CA1118590A (en) * | 1979-04-05 | 1982-02-23 | Gary E. Geiger | Stable compositions for use as corrosion inhibitors |
US4502978A (en) * | 1982-11-08 | 1985-03-05 | Nalco Chemical Company | Method of improving inhibitor efficiency in hard waters |
US4512552A (en) * | 1982-11-16 | 1985-04-23 | Katayama Chemical Works Co., Ltd. | Corrosion inhibitor |
US4936987A (en) * | 1983-03-07 | 1990-06-26 | Calgon Corporation | Synergistic scale and corrosion inhibiting admixtures containing carboxylic acid/sulfonic acid polymers |
US4529572A (en) * | 1984-09-21 | 1985-07-16 | Nalco Chemical Company | Polymer-zinc corrosion inhibitor |
FR2601030B1 (en) * | 1986-07-03 | 1989-04-07 | Coatex Sa | ACID COMPOSITIONS WITH HIGH CONCENTRATIONS OF ACTIVE MATERIALS FOR THE TREATMENT OF WATER AND / OR THE CLEANING OF THE FACILITIES CONTAINING THEM |
US4759900A (en) * | 1986-08-27 | 1988-07-26 | General Electric Company | Inhibition of radioactive cobalt deposition in water-cooled nuclear reactors |
US4950449A (en) * | 1986-08-27 | 1990-08-21 | General Electric Company | Inhibition of radioactive cobalt deposition in water-cooled nuclear reactors |
JPS63146702U (en) * | 1987-03-19 | 1988-09-28 | ||
NZ226331A (en) * | 1987-10-05 | 1991-08-27 | Calgon Corp | Method of inhibiting corrosion of metallic surfaces in aqueous systems using acrylic polymers and zinc ions; compositions therefor |
US5232629A (en) * | 1991-04-24 | 1993-08-03 | Calgon Corporation | Synergistic combination of sodium silicate and ortho-phosphate for controlling carbon steel corrosion |
US5137657A (en) * | 1991-04-24 | 1992-08-11 | Merck & Co., Inc. | Synergistic combination of sodium silicate and orthophosphate for controlling carbon steel corrosion |
US8524299B2 (en) * | 2005-05-20 | 2013-09-03 | The Procter & Gamble Company | Wet pet food products comprising a first layer bonded with a base food |
US9480275B2 (en) * | 2005-05-20 | 2016-11-01 | Mars Incorporated | Coated pet food products |
US20060260537A1 (en) * | 2005-05-20 | 2006-11-23 | The Iams Company | Wet pet food products and method for preparation |
US20130118987A1 (en) * | 2011-11-16 | 2013-05-16 | Ecowater Systems Llc | Anti-scale water treatment system and method |
CN102934758B (en) * | 2012-12-06 | 2014-09-10 | 山东新希望六和集团有限公司 | Feed for laying hen |
CN112771207A (en) * | 2018-08-28 | 2021-05-07 | 花王株式会社 | Oil and gas field corrosion inhibitor composition |
CN114057304B (en) * | 2020-08-05 | 2023-02-28 | 中国石油化工股份有限公司 | Composition for phosphorus-free pre-filming, method for pre-filming circulating cooling water system by using composition and application |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1767454C2 (en) * | 1968-05-11 | 1983-01-27 | Henkel KGaA, 4000 Düsseldorf | Process for corrosion and stone formation protection in warm and hot water systems |
US3578589A (en) * | 1969-03-17 | 1971-05-11 | Grace W R & Co | Method for treating cooling water |
US3687610A (en) * | 1969-07-30 | 1972-08-29 | Nalco Chemical Co | Process for inhibiting corrosion of metallic surfaces with cooling water containing phenol - aldehyde resins |
US3663448A (en) * | 1970-09-25 | 1972-05-16 | Calgon Corp | Inhibiting scale deposition |
US3669615A (en) * | 1970-09-28 | 1972-06-13 | William Bruce Murray | Corrosion inhibiting method |
US3709816A (en) * | 1971-07-01 | 1973-01-09 | Calgon Corp | Control of alluvial and other deposits in aqueous systems |
US3709815A (en) * | 1971-07-01 | 1973-01-09 | Calgon Corp | Boiler water treatment |
US3816333A (en) * | 1971-07-07 | 1974-06-11 | Monsanto Co | Methods of inhibiting corrosion with condensed polyalkylenepolyamine derivatives |
US3669616A (en) * | 1971-09-28 | 1972-06-13 | Virginia Chemicals Inc | Corrosion inhibiting compositions and method |
GB1374270A (en) * | 1971-12-10 | 1974-11-20 | Ciba Geigy Ag | Polymaleic anhydride compositions and their use |
US3752761A (en) * | 1972-03-09 | 1973-08-14 | Calgon Corp | Boiler water treatment |
US3766077A (en) * | 1972-08-16 | 1973-10-16 | Chemed Corp | Compositions and method for inhibiting scaling in aqueous systems |
FR2198106A1 (en) * | 1972-09-04 | 1974-03-29 | Rhone Progil | Corrosion and scale prevention in cooling systems - using phosphates, zinc salts and acrylic polymers |
-
1973
- 1973-06-04 US US367083A patent/US3885914A/en not_active Expired - Lifetime
-
1974
- 1974-05-16 NL NL7406599A patent/NL7406599A/xx not_active Application Discontinuation
- 1974-05-21 AU AU69182/74A patent/AU6918274A/en not_active Expired
- 1974-05-23 CA CA200,836A patent/CA1032746A/en not_active Expired
- 1974-05-29 FR FR7418575A patent/FR2231778B1/fr not_active Expired
- 1974-05-30 GB GB2409474A patent/GB1455343A/en not_active Expired
- 1974-05-31 BE BE145019A patent/BE815848A/en not_active IP Right Cessation
- 1974-05-31 DE DE19742426613 patent/DE2426613A1/en not_active Ceased
- 1974-06-04 LU LU70236A patent/LU70236A1/xx unknown
- 1974-06-04 JP JP49062597A patent/JPS5759308B2/ja not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2807222A1 (en) * | 1977-10-25 | 1979-04-26 | Buckman Labor Inc | SYNERGISTIC COMPOSITIONS FOR CONTROLLING CORROSION AND DEPOSITION |
Also Published As
Publication number | Publication date |
---|---|
BE815848A (en) | 1974-12-02 |
US3885914A (en) | 1975-05-27 |
CA1032746A (en) | 1978-06-13 |
GB1455343A (en) | 1976-11-10 |
FR2231778A1 (en) | 1974-12-27 |
FR2231778B1 (en) | 1979-02-16 |
NL7406599A (en) | 1974-12-06 |
LU70236A1 (en) | 1975-03-06 |
JPS5759308B2 (en) | 1982-12-14 |
AU6918274A (en) | 1975-11-27 |
JPS5021950A (en) | 1975-03-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8131 | Rejection |