The Mechanism of Knife-Line Attack In Welded Type 347 Stainless Steel

Holzworth, M. L.; Beck, F. H.; Fontana, Mars G.

doi:10.5006/0010-9312-7.12.441

Cited by 14 publications

(3 citation statements)

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“…Holzworth reports that the only way to eliminate this problem in SS347 was to reduce the C content to 0?03% (SS347ELC, extra low carbon). 44 With respect to the SS304L ((18Cr and 0?03C) Ebling and Scheil reported that corrosion rates were less than 20 mpy (510 mm year 21 ) for all heat treatments with the exception of 1100uF (590uC)/2 h/furnace cool which resulted in a corrosion rate of 62 mpy (1600 mm year 21 ). The authors concluded that '….…”

Section: Corrosion Of Ss347 and Ss304l Welds In Hno 3 (Sensitisation)mentioning

confidence: 99%

A review of corrosion issues related to uranyl nitrate base aqueous homogeneous reactors

Lillard

2010

Corrosion Engineering, Science and Technology

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Aqueous homogeneous reactors (AHRs) are liquid fuel nuclear reactors, typically consisting of an acidified nitrate or sulphate base solution of enriched uranium-235 ( 235 U). The goal of this paper is to review both the report and research literature on the topic of materials corrosion issues related to uranyl nitrate base AHRs. The materials of interest are stainless steel (SS)347, SS304L, SS304L-NAG, SS316L and zirconium (Zr) base alloys. In nitric acid solutions, SS and Zr alloys are passive, although there is some increased susceptibility of SS347 to intergranular corrosion (IGC) and knife-line attack as compared to other alloys. This is likely a result of the higher carbon (C) content in SS347. In uranyl nitrate fuel simulants corrosion rates increased as compared with nitric acid alone with the corrosion rate of SS347 being the highest while SS316 was the lowest of the austenitic stainless steels tested. In comparison, corrosion rates of Zr based alloys remained relatively unchanged in uranyl nitrate base solutions. The most prominent issue for these materials appears to be iodide (I 2 ) induced pitting corrosion on the walls of the off-gas extraction system with the potential for stress corrosion cracking. For Zr alloys, vapour phase I 2 pitting and SCC are well documented failure mechanisms with the threshold I 2 concentration being on the order of 1-2 ppm. In the off-gas extraction system of a 200 kW AHR calculations indicate that the I 2 concentration may be as high as 0?4-0?6 ppm warranting further study in this area. The influence of a prototypic AHR neutron flux on corrosion rates and susceptibility to underfilm corrosion, due to precipitation of UO 2 (OH) 2 , was not available from the literature.

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Section: Corrosion Of Ss347 and Ss304l Welds In Hno 3 (Sensitisation)mentioning

confidence: 99%

A review of corrosion issues related to uranyl nitrate base aqueous homogeneous reactors

Lillard

2010

Corrosion Engineering, Science and Technology

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“…Dostupnost mnoha různých tříd korozivzdorných ocelí s významně odlišným zpracovatelským, mechanickým a korozním chováním a cenou znesnadňuje projektantům a provozovatelům volbu optimálního materiálového řešení. Tento (16,(0)(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18),0 % Cr, 10,0-14,0 % Ni a 2,00-3,00 % Mo) zahrnuje materiál 1.4401 s 10,0-13,0 % Ni a 2,00-2,50 % Mo i 1.4436 s 10,5-13,0 % Ni a 2,50-3,00 % Mo a AISI 316L přibližně odpovídá korozivzdorné oceli 1.4404 s 2,00-2,50 % Mo, 1.4432 s 2,50-3,00 % Mo a částečně také 1.4435 s mírně zvýšeným obsahem Cr (17,0-19,0 %) a Ni (12,(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15),0 %) a 2,50-3,00 % Mo. Z praktického hlediska je korozní odolnost tříd korozivzdorných ocelí dle evropské normy odpovídajících dané třídě systému AISI podobná a jsou pro aplikaci v úpravnách vod zaměnitelné.…”

Section: úVodunclassified

Corrosion resistance of stainless steel in drinking water treatment plants and water storage units

Prošek¹,

Šefl²

2018

Koroze a Ochrana Materialu

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Main factors affecting the corrosivity of water in water treatment plants and water towers and other storage facilities, observed types of corrosion degradation of stainless steel and the effect of manufacturing and surface treatment on their corrosion resistance are discussed. A list of stainless steel grades currently used in the field of treatment, transport and storage of drinking water is given together with some other suitable ones. Based on literature resources, optimal stainless steel grades are recommended as a function of water composition and treatment method.

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“…The f a c t t h a t t h e attack was found only A mechanism has been proposed f o r knife-line attack i n s t a b i l i z e d a u s t e n i t i c s t a i n l e s s s t e e l by Holzworth and co-workers, (20) No crevice corrosion attack was found on specimens of e i t h e r s t a i n l e s s alloy. during exposure was the same a s t h a t of unconfined surfaces.…”

Section: With a Reported Carbon Contentmentioning

confidence: 99%

THOREX PILOT PLANT CORROSION STUDIES: I. CORROSION OF TYPES 304L AND 309SCb STAINLESS STEEL DURING PRODUCTION AND DEVELOPMENT PERIODS

English¹

1959

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The Mechanism of Knife-Line Attack In Welded Type 347 Stainless Steel

Abstract: FIGURE 61. Microhardness tests of samples heat treated in argon. Electrolytic sodium cyanide etch. 500Z.

Cited by 14 publications

References 0 publications

A review of corrosion issues related to uranyl nitrate base aqueous homogeneous reactors

A review of corrosion issues related to uranyl nitrate base aqueous homogeneous reactors

Corrosion resistance of stainless steel in drinking water treatment plants and water storage units

THOREX PILOT PLANT CORROSION STUDIES: I. CORROSION OF TYPES 304L AND 309SCb STAINLESS STEEL DURING PRODUCTION AND DEVELOPMENT PERIODS

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