Corrosion and Age Hardening Studies Of Some Cast Stainless Alloys Containing Ferrite

Flowers, J.; Beck, F. H.; Fontana, Mars G.

doi:10.5006/0010-9312-19.5.186

Cited by 42 publications

(5 citation statements)

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“…The properties of the DSS 1.4462 grade are as shown in Table 2.1. [11]. Alloy composition also has a significant effect on its SCC susceptibility.…”

Section: Figure 21 Plate and Shell Heat Exchanger[5]mentioning

confidence: 99%

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Anjali¹

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“…The properties of the DSS 1.4462 grade are as shown in Table 2.1. [11]. Alloy composition also has a significant effect on its SCC susceptibility.…”

Section: Figure 21 Plate and Shell Heat Exchanger[5]mentioning

confidence: 99%

UQ eSpace

Anjali¹

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“…12,13 Ferrite is also beneficial for stress corrosion cracking resistance and strength of ASSs. [14][15][16] However, the ferrite phase has been shown to be harmful for the pitting and selective corrosion resistance of ASSs. Garfias-Mesias et al 17 and Yang et al 18 reported that the pitting corrosion of duplex stainless steels in a chloride solution takes place preferentially in the ferrite phase rather in the austenite phase.…”

Section: Introductionmentioning

confidence: 99%

Effect of ferrite on pitting corrosion of Fe20Cr9Ni cast austenite stainless steel for nuclear power plant pipe

Wang

Yang

2014

Corrosion Engineering, Science and Technology

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The ferrite content and grain size in a Fe20Cr9Ni (wt-%) cast austenite stainless steel which has been widely used in primary coolant pipes of nuclear power plants were found to vary due to nonuniform solidification of the large pipe with a thickness of 95 mm. The pitting corrosion of Fe20Cr9Ni cast austenite stainless steel with five ferrite contents, i.e. 13, 11, 10, 9?5 and 8 vol.-% and different ferrite grain sizes was investigated in a 0?5 mol L 21 NaCl solution by means of potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS). Both pitting potential and charge transfer resistance value of specimens increased with the decreasing ferrite content and grain size, indicating that few and small ferrite grains were beneficial for improving pitting resistance. The passive film properties studied by EIS correlated well with the polarisation results. Electron probe microanalysis results showed that the difference in the Cr concentration between ferrite and austenite decreased with a decreasing amount of ferrite phase. Accordingly, the composition microsegregation was reduced, and passive film homogeneity of the specimens was improved.

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“…The difference in SCC behaviour of base and weld metals has been a subject of much disagreement in literature. Investigations by Flowers et al [18] indicated that cast duplex stainless steels were more resistant to SCC than single phase austenitic alloys because the globular ferrite present in the cast steel provided a ªkeyingº action which inhibited SCC propagation. Baeslack III et al [19] reported that of the various regions in a weld joint, the duplex unmixed zone is most susceptible to SCC due to the complementary and simultaneous occurrence of SCC of austenite and dissolution of delta-ferrite.…”

Section: Introductionmentioning

confidence: 99%