scholarly journals Surface topographic analyses of two-year coupons of alloy 22 from long-term corrosion testing

1999 ◽  
Author(s):  
P J Bedrossian
Keyword(s):  
Corrosion Testing ◽  
Alloy 22

Use of Alloy 22 as Long-Term Radioactive Waste Containment Material

2006 ◽  
pp. 53-57 ◽  
Author(s):  
Osvaldo Pensado ◽  
Roberto Pabalan ◽  
Darrell Dunn ◽  
Kuang-Tsan Chiang
Keyword(s):  
Radioactive Waste ◽  
Waste Containment ◽  
Alloy 22

Assessment of Ternary Multicomponent Diffusion in Alloy 22 (Ni-Cr-Mo)

2007 ◽  
Vol 266 ◽  
pp. 181-190 ◽  
Author(s):  
A.V. Jaques ◽  
J.C. LaCombe
Keyword(s):  
Optimization Problem ◽  
Single Phase ◽  
Multicomponent Diffusion ◽  
Diffusion Couples ◽  
Profile Data ◽  
Alloy 22 ◽  
Constant Diffusivity ◽  
Point Composition ◽  
Potential Use

Diffusivity [D] matrices are reported for the ternary Ni-Cr-Mo alloy in the approximate single-phase compositional range of Hastelloy C-22 (Alloy 22), surrounding Ni-63 wt.%, Cr-22.3 wt.%, and Mo-14.7 wt.%. These data will contribute to our understanding of the long-term phase stability of Alloy 22, and its potential use as a corrosion barrier in nuclear waste packages. Experimental diffusion couple data were obtained at selected temperatures from a series of diffusion couples, and evaluated, assuming constant diffusivity. Our approach treats the process as an optimization problem that simultaneously considers concentration profile data from numerous diffusion couples surrounding a single end-point composition. We make use of the mathematical characteristics of the analytical solution to this problem, reducing the number of parameters to be fitted. The parameter fitting is accomplished using a combination of heuristic and deterministic methods. Discussion of the sources and magnitudes of uncertainty in the diffusivity values is included.

Evaluation of The Long-Term Stability of Passive Corrosion On The Drip Shield and Waste Package Under Yucca Mountain Conditions

2002 ◽  
Vol 713 ◽  
Author(s):  
D.W. Shoesmith
Keyword(s):  
Environmental Conditions ◽  
Yucca Mountain ◽  
Localized Corrosion ◽  
Waste Package ◽  
Long Term Stability ◽  
Alloy 22 ◽  
Aqueous Environments ◽  
Engineered Barriers ◽  
Titanium Grade

ABSTRACTPossible long term corrosion scenarios for the engineered barriers proposed for the Yucca Mountain (Nevada, USA) repository are reviewed.Introduction:The materials proposed for the engineered barriers in the Yucca Mountain repository (Nevada, USA), Alloy-22 for the waste packages (WP) and titanium Grade-7 (Ti-7) for the drip shield (DS), appear unlikely to suffer localized corrosion (LC) and have very low passive corrosion (PC) rates (1–3). Since environmental conditions will become more benign as temperatures decline and aqueous environments become more dilute (4), this leads to the prediction of exceedingly long waste package lifetimes. In this review, possible corrosion scenarios are discussed in the context of the anticipated evolution in the repository environment.

scholarly journals Procedure of accelerated corrosion testing for modeling the long-term effect of moderate climate atmosphere on welded joints

2019 ◽  
Vol 2019 (11) ◽  
pp. 52-58
Author(s):  
V.V. Knysh ◽  
◽  
S.O. Osadchuk ◽  
S.O. Solovei ◽  
L.I. Nyrkova ◽  
...  
Keyword(s):  
Welded Joints ◽  
Term Effect ◽  
Corrosion Testing ◽  
Accelerated Corrosion ◽  
Long Term Effect ◽  
Accelerated Corrosion Testing ◽  
Moderate Climate

scholarly journals Long Term Corrosion Potential Behavior of Alloy 22 in Yucca Mountain Relevant Environments

2002 ◽  
Author(s):  
J Estill ◽  
G Hust ◽  
R Rebak
Keyword(s):  
Corrosion Potential ◽  
Yucca Mountain ◽  
Alloy 22

scholarly journals Long-Term Corrosion Behavior of Alloy 22 in 5 M CaCl2 at 120°C

2006 ◽  
Author(s):  
John C. Estill ◽  
Gary A. Hust ◽  
Kenneth J. Evans ◽  
Marshall L. Stuart ◽  
Rau´l B. Rebak
Keyword(s):  
Corrosion Rate ◽  
Salt Concentration ◽  
Crevice Corrosion ◽  
Immersion Time ◽  
Corrosion Potential ◽  
Open Circuit ◽  
General Corrosion ◽  
Critical Potential ◽  
Alloy 22

In conditions where tight crevices exist in hot chloride containing solutions Alloy 22 may suffer crevice corrosion. The occurrence (or not) of crevice corrosion in a given environment (e.g. salt concentration and temperature), is governed by the values of the critical potential (Ecrit) for crevice corrosion and the corrosion potential (Ecorr). This paper discusses the evolution of Ecorr and corrosion rate (CR) of creviced Alloy 22 specimens in 5 M calcium chloride (CaCl2) at 120°C. Tested specimens included non-creviced rods and multiple creviced assemblies (MCA) both non-welded (wrought) and welded. Results show that Alloy 22 suffers crevice corrosion under the open circuit conditions in the aerated hot CaCl2 brine. However, after more than a year immersion the propagation of crevice corrosion was not significant. The general corrosion rate decreased or remained unchanged as the immersion time increased. For rods and MCA specimens, the corrosion rate was lower than 100 nm/year after more than a year immersion time.

Long-term high-velocity oxidation and hot corrosion testing of several NiCrAl and FeCrAl base oxide dispersion strengthened alloys

1982 ◽  
Vol 17 (3-4) ◽  
pp. 205-221 ◽  
Author(s):  
Carl E. Lowell ◽  
Daniel L. Deadmore ◽  
J. Daniel Whittenberger
Keyword(s):  
High Velocity ◽  
Hot Corrosion ◽  
Oxide Dispersion Strengthened ◽  
Corrosion Testing ◽  
Oxide Dispersion
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