DE2601866A1 - Aqueous NACL TEST SOLUTION, IN PARTICULAR FOR ALUMINUM AND ITS ALLOYS - Google Patents
Aqueous NACL TEST SOLUTION, IN PARTICULAR FOR ALUMINUM AND ITS ALLOYSInfo
- Publication number
- DE2601866A1 DE2601866A1 DE19762601866 DE2601866A DE2601866A1 DE 2601866 A1 DE2601866 A1 DE 2601866A1 DE 19762601866 DE19762601866 DE 19762601866 DE 2601866 A DE2601866 A DE 2601866A DE 2601866 A1 DE2601866 A1 DE 2601866A1
- Authority
- DE
- Germany
- Prior art keywords
- aluminum
- alloys
- aqueous nacl
- test solution
- nacl test
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Environmental Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Ecology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
16. Januar 1976 -/gJan. 16, 1976 - / g
Vereinigte Metallwerke Ranshofen-Berndorf Aktiengesellschaft, Braunau a.I. ÖsterreichUnited Metallwerke Ranshofen-Berndorf Aktiengesellschaft, Braunau a.I. Austria
Wässerige NaCl-Prüflösung, insbesondere für Aluminium und dessen LegierungenAqueous NaCl test solution, especially for aluminum and its alloys
Bekanntlich beanspruchen Korrosionsprüfungen unter natürlichen Bedingungen große Zeiträume und man ist daher bemüht, diese durch die Anwendung intensiver Korrosionsmittel zu verkürzen. Dies betrifft insbesondere die Spannungsrißkorrosionsprüfung, bei der viele Proben untersucht werden müssen und man daher entweder eine Vielzahl von Geräten oder große Zeiträume benötigt. It is well known that corrosion tests under natural conditions require long periods of time and efforts are therefore made to do this can be shortened by using intensive corrosion agents. This applies in particular to the stress corrosion cracking test, in which many samples have to be examined and therefore either a large number of devices or long periods of time are required.
Erfindungsgemäß können diese Schwierigkeiten dadurch behoben werden, daß eine wässerige NaCl-Prüflösung außer o,5-5 % NaCl und o,1-1 % H3O2 noch Natriumazetat zur Pufferung enthält. Nach einem weiteren Kennzeichen der Erfindung erfolgt die PH-Wert-Einstellung auf 14 1 mit Essigsäure.According to the invention, these difficulties can be eliminated by the fact that an aqueous NaCl test solution contains sodium acetate for buffering in addition to 0.5-5% NaCl and 0.1-1% H 3 O 2. According to a further characteristic of the invention, the pH is adjusted to 14 l with acetic acid.
Mittels der erfindungsgemäßen Lösung kann die Zeit bis zum Bruch der Probe, die je nach Verwendung von Korrosionsmitteln in den bisher bekannten Verfahren zwischen I00 und 5ooo Stunden liegt, durch nachstehend angeführte Korrosionslösung wesentlich verkürzt werden. By means of the solution according to the invention, the time can be up to to break the sample, which depending on the use of corrosion agents in the previously known methods between 100 and 5,000 hours can be significantly shortened by the corrosion solution listed below.
Ist z.B. bei normaler, genormter 3%-iger NaCl-Lösung die Lebensdauer einer Probe aus AlZnMgI in besonders SEK-anfälligem Zustand ca. 15 Stunden, beträgt sie mit der erfindungsgemäßen Lösung im gleichen Zustand maximal 1,5 Stunden.For example, this is the case with normal, standardized 3% NaCl solution Lifetime of a sample made of AlZnMgI in particularly SEK-prone areas State approx. 15 hours, it is a maximum of 1.5 with the solution according to the invention in the same state Hours.
609830/0690 "2 "609830/0690 " 2 "
Bevorzugte Zusammensetzung:Preferred composition:
wässrige NaCl-Lösung (3o g/l)aqueous NaCl solution (3o g / l)
14 ml H3O3 pro Liter
1oo ml InNaOH pro Liter
ca. 25 ml/1 CH0COOH (1oo%-ig) auf P„414 ml H 3 O 3 per liter
100 ml InNaOH per liter
approx. 25 ml / 1 CH 0 COOH (100%) on P “4
Die P„-Wert-Einsteilung kann je nach Material mit Essig-Depending on the material, the P "value classification can be made with vinegar
säure von 1 bis 7 eingestellt werden. Vorteil dieser Lösung gegenüber bisher üblichen Korrosionsmitteln ist die bis zum Versuchsende konstant bleibende chemische Zusammensetzung. Wegen des raschen Angriffes muß dabei allerdings die allgemeine Korrosion der Probe beachtet werden (Schicht- und Flächenkorrosion).acidity can be set from 1 to 7. The advantage of this solution compared to the previously common corrosive agents is that up to Chemical composition remaining constant at the end of the experiment. Because of the rapid attack, however, the general Corrosion of the sample must be taken into account (layer and surface corrosion).
Die Erfindung ist auf das beschriebene Ausführungsbeispiel nicht beschränkt. So können außer Spannungskorrosionsprüfungen bei Aluminium und Aluminium-Legierungen auch solche bei anderen Metallen durchgeführt werden und das Mittel eignet sich darüber hinaus auch für allgemeine Korrosionsprüfungen an Metallen.The invention is based on the embodiment described not restricted. In addition to stress corrosion tests on aluminum and aluminum alloys, those are carried out with other metals and the agent is also suitable for general Corrosion tests on metals.
609830/0690609830/0690
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT41175A AT336315B (en) | 1975-01-21 | 1975-01-21 | METAL CORROSION TEST METALS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2601866A1 true DE2601866A1 (en) | 1976-07-22 |
Family
ID=3489905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19762601866 Pending DE2601866A1 (en) | 1975-01-21 | 1976-01-20 | Aqueous NACL TEST SOLUTION, IN PARTICULAR FOR ALUMINUM AND ITS ALLOYS |
Country Status (6)
| Country | Link |
|---|---|
| AT (1) | AT336315B (en) |
| CH (1) | CH598591A5 (en) |
| DE (1) | DE2601866A1 (en) |
| FR (1) | FR2298591A1 (en) |
| GB (1) | GB1517452A (en) |
| IT (1) | IT1060473B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0610003A1 (en) * | 1993-02-02 | 1994-08-10 | Nalco Chemical Company | Method for determining the efficacy of a corrosion protection treatment |
| CN110646336A (en) * | 2019-09-27 | 2020-01-03 | 江阴达克罗金属制品有限公司 | Dacromet coating corrosion resistance production site rapid test method |
| CN113005457B (en) * | 2021-02-25 | 2023-03-17 | 中国船舶重工集团公司第七二五研究所 | Metallographic corrosive agent of aluminum alloy shear band, corrosion method and application |
| CN113390911B (en) * | 2021-05-26 | 2023-02-07 | 中国工程物理研究院材料研究所 | Extracting corrosive agent and extracting method for beryllium phase three-dimensional microscopic morphology of beryllium-aluminum alloy |
-
1975
- 1975-01-21 AT AT41175A patent/AT336315B/en not_active IP Right Cessation
-
1976
- 1976-01-19 FR FR7601213A patent/FR2298591A1/en not_active Withdrawn
- 1976-01-19 CH CH56676A patent/CH598591A5/xx not_active IP Right Cessation
- 1976-01-20 IT IT4771776A patent/IT1060473B/en active
- 1976-01-20 DE DE19762601866 patent/DE2601866A1/en active Pending
- 1976-01-20 GB GB218376A patent/GB1517452A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ATA41175A (en) | 1976-08-15 |
| CH598591A5 (en) | 1978-05-12 |
| GB1517452A (en) | 1978-07-12 |
| AT336315B (en) | 1977-04-25 |
| IT1060473B (en) | 1982-08-20 |
| FR2298591A1 (en) | 1976-08-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OHJ | Non-payment of the annual fee |