Effect of TiO2on the Repassivation Kinetics of Alloy 600 in Caustic Solutions

CORROSION ◽  
10.5006/0742 ◽  
2013 ◽  
Vol 69 (4) ◽  
pp. 345-351
Author(s):  
I. Toor ◽  
M. Ejaz ◽  
H.-S. Kwon
Keyword(s):  
Alloy 600 ◽  
Kinetics Of ◽  
Repassivation Kinetics

scholarly journals Susceptibility to Severe PWSCC (primary water stress corrosion cracking) of LTMA (low temperature mill anneal) Alloy 600

2020 ◽  
Vol 58 (12) ◽  
pp. 815-821
Author(s):  
Sung Soo Kim ◽  
Jung Jong Yeob ◽  
Young Suk Kim
Keyword(s):  
Water Stress ◽  
Low Temperature ◽  
Stress Corrosion Cracking ◽  
Short Range ◽  
Alloy 600 ◽  
Lattice Contraction ◽  
Short Range Ordering ◽  
Mill Anneal ◽  
Primary Water ◽  
Kinetics Of

It has been proposed that a primary water stress corrosion cracking (PWSCC) in pressurized water reactor (PWR) is governed by a lattice contraction due to a short range ordering reaction in Alloy 600. This leads researcher to think that the kinetics of lattice contraction may control a susceptibility of PWSCC in Alloy 600. A lattice variation with ordering treatment at 400 <sup>o</sup>C was systematically investigated using high resolution neutron diffraction(HRPD) in high temperature mill anneal (HTMA), low temperature mill anneal (LTMA), and sensitized (SEN) Alloy 600. The results showed that ordering treatment caused an isotropic lattice contraction due to short range ordering (SRO) reaction. The lattice contractions of (111) plane are saturated to be 0.04% in 4 to 1500 hours at 400 <sup>o</sup>C according to prior treatment condition. The lattice contraction in the magnitude of 0.03% of (111) plane in LTMA Alloy 600 is faster by 8 times and 66 times than that of SEN and HTMA, respectively. This fact may explain why the LTMA is most susceptible to PWSCC through of kinetics of lattice contraction in Alloy 600. Thus, it is possible to conclude that the susceptibility of Alloy 600 to PWSCC is governed by the kinetics of (111) lattice contraction.

The kinetics of pit growth on alloy 600 in chloride solutions at high temperatures

1987 ◽  
Vol 27 (8) ◽  
pp. 859-867 ◽  
Author(s):  
Z. Szklarska-Smialowska ◽  
D. Grimes ◽  
J. Park
Keyword(s):  
High Temperatures ◽  
Alloy 600 ◽  
Chloride Solutions ◽  
Kinetics Of
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