Crevice Corrosion and Its Relation to Stress-Corrosion Cracking

2009 ◽  
pp. 289-289-19 ◽  
Author(s):  
CM Chen ◽  
MH Froning ◽  
ED Verink
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Crevice Corrosion ◽  
Corrosion Cracking

NICROFER 5716 HMoW

Alloy Digest ◽  
1985 ◽  
Vol 34 (11) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Stress Corrosion ◽  
Tensile Properties ◽  
Stress Corrosion Cracking ◽  
Crevice Corrosion ◽  
Corrosion Cracking ◽  
Low Carbon ◽  
Nickel Chromium ◽  
Corrosion Pitting

Abstract NICROFER 5716 HMoW is a nickel-chromium-molybdenum alloy with tungsten and extremely low carbon and silicon contents. It has excellent resistance to crevice corrosion, pitting and stress-corrosion cracking. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, machining, and joining. Filing Code: Ni-324. Producer or source: Vereingte Deutsche Metallwerke AG.

Concept of the Occluded Corrosion Cell

CORROSION ◽  
1970 ◽  
Vol 26 (8) ◽  
pp. 349-350 ◽  
Author(s):  
B. F. BROWN
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Intergranular Corrosion ◽  
Crevice Corrosion ◽  
Corrosion Cracking ◽  
The Self ◽  
Corrosion Cell ◽  
Filiform Corrosion ◽  
Corrosion Pitting ◽  
The Common

Abstract It is proposed that the various localized forms of corrosion (pitting, stress corrosion cracking, intergranular corrosion, crevice corrosion, filiform corrosion, tuberculation, and exfoliation) have the common feature of local acidification by hydrolysis. The acidity is viewed as having a responsible role in the self-perpetuating character of these corrosion forms. Three possible benefits of this rationale are offered.

Assessment of Crevice Corrosion and Hydrogen Induced Stress Corrosion Cracks of Ti-Pd Alloys for HLW Overpack In Deep Underground Water Environments

2002 ◽  
Vol 757 ◽  
Author(s):  
Guen Nakayama ◽  
Koichi Murakami ◽  
Masatsune Akashi
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Crevice Corrosion ◽  
Crack Depth ◽  
Underground Water ◽  
Constant Load ◽  
Corrosion Cracking ◽  
Ti Alloys ◽  
Induced Stress ◽  
Deep Underground

ABSTRACTCrevice corrosion and hydrogen-induced stress corrosion cracking tendencies of titanium (Ti) alloys in deep underground water environments are investigated in the present paper. The crevice corrosion repassavation potential, ER,CREV of Ti-palladium (Pd) alloys was measured and compared with the free corrosion potential, ESP = +0.32 V vs. SHE. The minimum Pd content of the alloys for suppressing crevice corrosion in the envisaged most corrosive high-level radioactive waste (HLW) disposal environment, corresponding to the seawater originated underground water of 0.6 mol/L [NaCl] at 100 °C, is 0.05 %, Ti-Gr.17 alloy. The Pd content of 0.01 % is found to be sufficient for realizing satisfactory crevice corrosion resistance in transuranium (TRU) disposal environment of 0.6 mol/L [NaCl] at 80 °C. The hydrogen-induced stress corrosion cracking tendencies of the Ti alloys caused by the formation and cracking of hydride layers on alloy surfaces were assessed by galvanostatic and constant-load tests conducted in completely reducing environments. Test results indicate that Ti-Pd alloys are immune to stress-corrosion cracking in HLW underground disposal condition for 1000 years. Total electrical charge density in TRU waste overpacks for 60,000 years, estimated from analyses of thermal history in waste emplacement drifts, was found to be 7.5 MC/m2, suggesting the hydride layers formed were 30 μm thick and the crack depth was 15 μm on Ti-Gr.17. Thus, the depth of the stress-corrosion cracks is too small to be taken into engineering consideration. The above results suggest that Ti-Pd alloys with Pd content over 0.05 % for HLW and 0.01 % for TRU waste can be utilized as corrosion-resistant layers of waste-disposal containers of HLW and TRU waste.

C-22 FILLER METAL

Alloy Digest ◽  
1993 ◽  
Vol 42 (7) ◽  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Physical Properties ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Crevice Corrosion ◽  
Elevated Temperatures ◽  
Filler Metal ◽  
Corrosion Cracking ◽  
Nickel Chromium

Abstract Alloy C-22 is a nickel-chromium-molybdenum alloy that has outstanding resistance to pitting, crevice corrosion and stress-corrosion cracking. The alloy also has excellent resistance to both reducing and oxidizing media. The alloy has good mechanical properties at both room and elevated temperatures. It can be hot upset, forged, deep drawn, impact extruded and welded. This datasheet provides information on composition, physical properties, and elasticity as well as fracture toughness. It also includes information on joining. Filing Code: Ni-437. Producer or source: Haynes International Inc.

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