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首页> 外文会议>NACE annual conference & exposition >INVESTIGATION OF THE CORROSIVITY OF THE VAPOR PHASEOVER HIGH-LEVEL RADIOACTIVE WASTE
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INVESTIGATION OF THE CORROSIVITY OF THE VAPOR PHASEOVER HIGH-LEVEL RADIOACTIVE WASTE

机译：高水平放射性废料中气相的腐蚀性研究

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摘要

Corrosion in the vapor space and at the liquid/air interface of the Department of Energy (DOE) high levelwaste (HLW) tanks have emerged as a potentially aggressive corrosion mechanism. Controls on the solutionchemistry are in place to preclude the initiation and propagation of degradation in the tanks within the liquid space.However, recent experience has shown that steel not in contact with the bulk waste solution but exposed to the“vapor space” above the bulk waste and the liquid/air interface, may be vulnerable to the initiation and propagationof degradation. Experimentation was performed to determine the potential for vapor space corrosion and liquid/airinterface corrosion in ASTM A285 and A537 steels, the materials of construction of the Savannah River Site (SRS)HLW storage tanks. Corrosion studies were performed with flat, unstressed coupons in nitrate, nitrite, andhydroxide solutions. The results suggest that the potential for vapor space and liquid/air interface general corrosionand pitting exists even with inhibited solution chemistry. Further experimentation is planned to quantify themagnitude of the corrosion and also to determine the potential for stress corrosion cracking under similar conditions.
机译：能源部（DOE）高放废物（HLW）储罐的蒸气空间和液/气界面的腐蚀已成为一种潜在的腐蚀性腐蚀机理。对溶液化学的控制已经到位，以防止液体空间内罐内降解的发生和传播。但是，最近的经验表明，钢不与大块废液接触，而是暴露于大块上方的“蒸气空间”废物和液体/空气界面可能易于降解的引发和扩散。进行实验以确定在ASTM A285和A537钢（萨凡纳河工地（SRS）HLW储罐的构造材料）中发生蒸气空间腐蚀和液/气界面腐蚀的可能性。使用平坦，无应力的试样在硝酸盐，亚硝酸盐和氢氧化物溶液中进行腐蚀研究。结果表明，即使抑制了溶液化学作用，也存在蒸气空间和液/气界面普遍腐蚀和点蚀的可能性。计划进行进一步的实验，以量化腐蚀的幅度，并确定在类似条件下应力腐蚀开裂的可能性。

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