Effects of pH and stress intensity on crack growth rate in Alloy 600 in lithiated + borated water at high temperatures
Conference
·
OSTI ID:48086
- Ohio State Univ., Columbus, OH (United States)
- E.P.R.I., Palo Alto, CA (United States)
Primary water stress corrosion cracking studies were performed on Alloy 600. Constant load tests were conducted at 330 and 350{degrees}C in solutions containing dissolved hydrogen, boric acid (0 < B < 1200 ppm) and lithium hydroxide (0 < Li < 10 ppm). In the PWR working conditions range, that is, 6.9 < pH < 7.4 (or 0.5 ppm < Li < 3.5), there is little effect of the solution pH on the intergranular crack growth rate (IGSCC). However, there is a strong influence of the stress intensity on the IGSCC. K{sub ISCC} {approx} 5-10 MPa{radical}m. Dissolution plays an important role in the IGSCC process.
- OSTI ID:
- 48086
- Report Number(s):
- CONF-910808--
- Country of Publication:
- United States
- Language:
- English
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