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Corrosion tests of high-alloy stainless steels and nickel alloys in natural sea water under flowing conditions. Final report; Pruefung hochlegierter Staehle und Nickellegierungen in natuerlichem Meerwasser unter stroemenden Bedingungen. Schlussbericht

Miscellaneous:

Abstract

As a result of the corrosion tests a clear difference in the corrosion resistance of stainless steels/nickel alloys as a function of their Cr, Mo and Ni content has been found. Corrosion tests with natural sea water should confirm these results. The MPA/FH Hamburg (Technical University Hamburg, Material Inspection Institute) (see project H 7.1/11B) has built a test loop in Helgoland for this purpose. This installation is operating with natural sea water circulation. The selected materials 317 LN, 904 L, 926, alloy 28, alloy G-3, alloy 625 and alloy C-276 have been tested for one year under flowing (1 m/s) and quasi standstill conditions (0.1 m/s) for pitting, crevice and stress corrosion cracking. Tube and sheet samples with and without welding seams have been exposed at temperatures of 50 to 70deg C. In addition alloy 59 has been tested for one year and alloy 31 and alloy 24 for only 9 months as sheet samples under quasi standstill conditions at 70deg C. The influence of low, medium and very high flow velocities (60 to 2000 min{sup -1}) was proven in laboratory tests with a rotating disc electrode under potentiostatic conditions (U = 0.5 V{sub H}) in artificial sea water at  More>>
Authors:
Publication Date:
Apr 21, 1992
Product Type:
Miscellaneous
Report Number:
ETDE-mf-93750839
Reference Number:
SCA: 360105; PA: DE-93:000217; SN: 93000916013
Resource Relation:
Journal Issue: no. 137; Other Information: PBD: 21 Apr 1992; Related Information: Metallgesellschaft AG. Bericht des Zentrallaboratoriums
Subject:
36 MATERIALS SCIENCE; NICKEL BASE ALLOYS; CORROSION; NICKEL-CHROMIUM STEELS; CHROMIUM-NICKEL STEELS; SEAWATER; FLUID FLOW; MOLYBDENUM ALLOYS; CORROSION RESISTANCE; MATERIALS TESTING; 360105; CORROSION AND EROSION
OSTI ID:
10112844
Research Organizations:
Metallgesellschaft AG, Frankfurt am Main (Germany); Bundesministerium fuer Forschung und Technologie, Bonn (Germany)
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
Other: ON: DE93750839; TRN: DE9300217
Availability:
OSTI; NTIS (US Sales Only)
Submitting Site:
DE
Size:
131 p.
Announcement Date:
Jun 30, 2005

Miscellaneous:

Citation Formats

Altpeter, E. Corrosion tests of high-alloy stainless steels and nickel alloys in natural sea water under flowing conditions. Final report; Pruefung hochlegierter Staehle und Nickellegierungen in natuerlichem Meerwasser unter stroemenden Bedingungen. Schlussbericht. Germany: N. p., 1992. Web.
Altpeter, E. Corrosion tests of high-alloy stainless steels and nickel alloys in natural sea water under flowing conditions. Final report; Pruefung hochlegierter Staehle und Nickellegierungen in natuerlichem Meerwasser unter stroemenden Bedingungen. Schlussbericht. Germany.
Altpeter, E. 1992. "Corrosion tests of high-alloy stainless steels and nickel alloys in natural sea water under flowing conditions. Final report; Pruefung hochlegierter Staehle und Nickellegierungen in natuerlichem Meerwasser unter stroemenden Bedingungen. Schlussbericht." Germany.
@misc{etde_10112844,
title = {Corrosion tests of high-alloy stainless steels and nickel alloys in natural sea water under flowing conditions. Final report; Pruefung hochlegierter Staehle und Nickellegierungen in natuerlichem Meerwasser unter stroemenden Bedingungen. Schlussbericht}
author = {Altpeter, E}
abstractNote = {As a result of the corrosion tests a clear difference in the corrosion resistance of stainless steels/nickel alloys as a function of their Cr, Mo and Ni content has been found. Corrosion tests with natural sea water should confirm these results. The MPA/FH Hamburg (Technical University Hamburg, Material Inspection Institute) (see project H 7.1/11B) has built a test loop in Helgoland for this purpose. This installation is operating with natural sea water circulation. The selected materials 317 LN, 904 L, 926, alloy 28, alloy G-3, alloy 625 and alloy C-276 have been tested for one year under flowing (1 m/s) and quasi standstill conditions (0.1 m/s) for pitting, crevice and stress corrosion cracking. Tube and sheet samples with and without welding seams have been exposed at temperatures of 50 to 70deg C. In addition alloy 59 has been tested for one year and alloy 31 and alloy 24 for only 9 months as sheet samples under quasi standstill conditions at 70deg C. The influence of low, medium and very high flow velocities (60 to 2000 min{sup -1}) was proven in laboratory tests with a rotating disc electrode under potentiostatic conditions (U = 0.5 V{sub H}) in artificial sea water at temperatures of 50, 70 and 90deg C and emphasizing on the materials 926, alloy 28 and alloy 625. The nickel alloys 625, alloy C-276 and alloy 59 have proven to be corrosion resistant in natural sea water at 50deg C and 70deg C under all here tested conditions. If exposed to unfavorable crevice corrosion conditions, crevice corrosion already has been found at temperatures of 50deg C on the stainless steels 317LN and 904L. Among the tested stainless steels, the one with the highest Mo content, 926, shows the highest crevice corrosion resistance. Stainless steels show a tendency to be less resistant to crevice corrosion in natural sea water than in artificial sea water. (orig./MM) With 14 refs., 13 tabs., 89 figs. [Deutsch] Im Zuge der Korrosionsuntersuchungen hatte sich eine deutliche Differenzierung in der Bestaendigkeit der nichtrostenden Staehle/Nickellegierungen in Abhaengigkeit von deren Gehalten an Cr, Mo und Ni ergeben. Durch Korrosionsversuche in natuerlichem Meerwasser sollten diese Aussagen verifiziert werden. Vom MPA/FH Hamburg wurde zu diesem Zweck auf der Insel Helgoland eine Testanlage mit natuerlicher Meerwasserumwaelzung gebaut. Die ausgewaehlten Werkstoffe 1.4439, 1.4539, 1.4529, 1.4563, 2.4619, 2.4856 und 2.4819 wurden unter Stroemungsbedingungen (1 m/s) und quasi Stillstandsbedingungen (0,1 m/s) in Rohr- und Blechform, sowie im geschweissten Zustand bei 50 und 70deg C jeweils 1 Jahr lang auf Lokalkorrosion geprueft. Unter quasi Stillstandsbedingungen wurden zusaetzlich der Werkstoff 2.4605 und nur 9 Monate die Werkstoffe 1.4562 und 1.4565 in Blechform bei 70deg C geprueft. Der Einfluss niedriger, mittlerer und sehr hoher Stroemungsgeschwindigkeiten wurde in Laboruntersuchungen mit der rotierenden Scheibenelektrode (60 bis 2000 min{sup -1}) unter potentiostatischen Bedingungen (U = 0,5 V{sub H}) in kuenstlichem Meerwasser bei 50, 70 und 90deg C schwerpunktmaessig an den Werkstoffen 1.4529, 1.4563 und 2.4856 ueberprueft. Die Nickellegierungen 2.4856, 2.4819 und 2.4605 sind in natuerlichem Meerwasser von 50 und 70deg C unter allen hier gewaehlten Pruefbedingungen korrosionsbestaendig. Unter unguenstigen Spaltbedingungen tritt bei den nichtrostenden Staehlen 1.4439, 1.4539 und 1.4563 bereits bei 50deg C Spaltkorrosion auf. Der am hoechsten in Mo-legierte Stahl 1.4529 ist von den geprueften, nichtrostenden Staehlen am wenigsten spaltkorrosionsgefaehrdet. Tendenziell erscheinen die nochtrostenden Staehle in natuerlichem Meerwasser spaltkorrosionsanfaelliger als in kuenstlichem Meerwasser. (orig./MM) With 14 refs., 13 tabs., 89 figs.}
issue = {no. 137}
place = {Germany}
year = {1992}
month = {Apr}
}