原子能科学技术
原子能科學技術
원자능과학기술
Atomic Energy Science and Technology
2015年
10期
1849-1854
,共6页
陆辉%杜东海%陈凯%张乐福
陸輝%杜東海%陳凱%張樂福
륙휘%두동해%진개%장악복
316L不锈钢%应力腐蚀开裂%氯离子%直流电压降
316L不鏽鋼%應力腐蝕開裂%氯離子%直流電壓降
316L불수강%응력부식개렬%록리자%직류전압강
316L stainless steel%stress corrosion cracking%chloride ion%direct current potential drop
本文采用直流电压降(DCPD)方法,使用恒 K(K=27.5 MPa?m1/2)加载方式,在核电厂高温高压水环境中研究了氯离子对316L不锈钢的应力腐蚀裂纹扩展速率的影响。实验结果表明:在高温除氧水中,氯离子会加快316L不锈钢的应力腐蚀裂纹扩展速率,且当水中存在溶解氧时,氯离子对应力腐蚀裂纹扩展速率的影响更明显。
本文採用直流電壓降(DCPD)方法,使用恆 K(K=27.5 MPa?m1/2)加載方式,在覈電廠高溫高壓水環境中研究瞭氯離子對316L不鏽鋼的應力腐蝕裂紋擴展速率的影響。實驗結果錶明:在高溫除氧水中,氯離子會加快316L不鏽鋼的應力腐蝕裂紋擴展速率,且噹水中存在溶解氧時,氯離子對應力腐蝕裂紋擴展速率的影響更明顯。
본문채용직류전압강(DCPD)방법,사용항 K(K=27.5 MPa?m1/2)가재방식,재핵전엄고온고압수배경중연구료록리자대316L불수강적응력부식렬문확전속솔적영향。실험결과표명:재고온제양수중,록리자회가쾌316L불수강적응력부식렬문확전속솔,차당수중존재용해양시,록리자대응력부식렬문확전속솔적영향경명현。
T he effect of chloride ions on stress corrosion crack (SCC ) grow th rate of 316L stainless steel (SS) was studied in high temperature pure water of nuclear power plant environment .The stress corrosion crack length was continuously monitored by direct current potential drop under constant K of 27.5 MPa? m1/2 .The results show that Cl- accelerates SCC grow th rate of 316L SS in high temperature deoxygenated water .In addition ,the effect of Cl- on SCC growth rate is more remarkable in the pre‐sence of dissolved oxygen (DO) in high temperature pure water .