Effect of stress and surface finish on Pb-caustic SCC of Alloy 690TT

Giulia Mazzei; M. Grace Burke; D A Horner; Fabio Scenini

Effect of stress and surface finish on Pb-caustic SCC of Alloy 690TT

Giulia Mazzei, M. Grace Burke, D A Horner, Fabio Scenini

Rolls-Royce plc

Research output: Contribution to journal › Article › peer-review

Abstract

The effect of surface preparation on lead-induced stress corrosion cracking (PbSCC) of Alloy 690TT in Pb-caustic solution was investigated using C-rings manufactured from tubing that was either as-manufactured or polished. The surface deformed layer on the as-manufactured samples promoted the formation of an oxide, which reduced the number of sites for crack nucleation. Conversely, the polished surface developed crystallographic corrosion slots from which some of the cracks seemed to initiate. Advanced microstructural characterization complemented with stress analysis of the samples, suggested that the early stages of PbSCC are consistent with a film-rupture/slip-dissolution mechanism and influenced by de-alloying.

Original language	English
Journal	Corrosion Science
Publication status	Accepted/In press - 6 Apr 2021

Embargoed Document

AAM - Giulia Corr. Sci 1
Accepted author manuscript, 2.3 MB
Embargo ends: 1/01/31

Cite this

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title = "Effect of stress and surface finish on Pb-caustic SCC of Alloy 690TT",

abstract = "The effect of surface preparation on lead-induced stress corrosion cracking (PbSCC) of Alloy 690TT in Pb-caustic solution was investigated using C-rings manufactured from tubing that was either as-manufactured or polished. The surface deformed layer on the as-manufactured samples promoted the formation of an oxide, which reduced the number of sites for crack nucleation. Conversely, the polished surface developed crystallographic corrosion slots from which some of the cracks seemed to initiate. Advanced microstructural characterization complemented with stress analysis of the samples, suggested that the early stages of PbSCC are consistent with a film-rupture/slip-dissolution mechanism and influenced by de-alloying.",

author = "Giulia Mazzei and Burke, {M. Grace} and Horner, {D A} and Fabio Scenini",

year = "2021",

month = apr,

day = "6",

language = "English",

journal = "Corrosion Science",

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publisher = "Elsevier BV",

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TY - JOUR

T1 - Effect of stress and surface finish on Pb-caustic SCC of Alloy 690TT

AU - Mazzei, Giulia

AU - Burke, M. Grace

AU - Horner, D A

AU - Scenini, Fabio

PY - 2021/4/6

Y1 - 2021/4/6

N2 - The effect of surface preparation on lead-induced stress corrosion cracking (PbSCC) of Alloy 690TT in Pb-caustic solution was investigated using C-rings manufactured from tubing that was either as-manufactured or polished. The surface deformed layer on the as-manufactured samples promoted the formation of an oxide, which reduced the number of sites for crack nucleation. Conversely, the polished surface developed crystallographic corrosion slots from which some of the cracks seemed to initiate. Advanced microstructural characterization complemented with stress analysis of the samples, suggested that the early stages of PbSCC are consistent with a film-rupture/slip-dissolution mechanism and influenced by de-alloying.

AB - The effect of surface preparation on lead-induced stress corrosion cracking (PbSCC) of Alloy 690TT in Pb-caustic solution was investigated using C-rings manufactured from tubing that was either as-manufactured or polished. The surface deformed layer on the as-manufactured samples promoted the formation of an oxide, which reduced the number of sites for crack nucleation. Conversely, the polished surface developed crystallographic corrosion slots from which some of the cracks seemed to initiate. Advanced microstructural characterization complemented with stress analysis of the samples, suggested that the early stages of PbSCC are consistent with a film-rupture/slip-dissolution mechanism and influenced by de-alloying.

M3 - Article

SN - 0010-938X

JO - Corrosion Science

JF - Corrosion Science

ER -

Effect of stress and surface finish on Pb-caustic SCC of Alloy 690TT

Abstract

Embargoed Document

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