THE EFFECT OF SULFATE ON ENVIRONMENTAL CRACKING IN BOILING WATER-REACTORS UNDER CONSTANT LOAD OR FATIGUE

被引：7
|
作者：
LJUNGBERG, LG [1 ]
CUBICCIOTTI, D [1 ]
TROLLE, M [1 ]
机构：
[1] SWEDISH NUCL POWER INSPECTORATE,S-10252 STOCKHOLM,SWEDEN
来源：
CORROSION | 1990年 / 46卷 / 08期
关键词：
D O I：
10.5006/1.3585162
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Low-frequency fatigue tests at load ratios 0.8 and 0.9 and constant load tests were run on sensitized type 304 (UNS S30400) stainless steel (SS), type 316 nuclear grade SS and nickel-base alloy 600 (UNS N06600) in simulated boiling water reactor environments. The environments simulated normal water chemistry (NWC) and hydrogen water chemistry with 15 or 5 ppb O2, clean or with sulfate. Oxygen enhanced cracking of type 304 SS and alloy 600, but not type 316. Under constant load conditions, crack propagation was always low in clean environments. Sulfate enhanced cracking in all three materials, most in type 304 SS and least in type 316. Crack enhancement due to 0.1 ppm sulfate was worse under constant load than under fatigue load conditions for type 304 SS in NWC up to a factor of 100 in constant load and a factor of 10 in fatigue.
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页码：641 / 652
页数：12
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