• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>ICONE18;International conference on nuclear engineering >CORROSION TEST OF 304 STAINLESS STEEL IN HYDRAZINE AND METHANOL SOLUTIONS AT 320 °C UNDER GAMMA-IRRADIATION AND GAMMA RADIOLYSIS OF HYDRAZINE AND METHANOL
【24h】

CORROSION TEST OF 304 STAINLESS STEEL IN HYDRAZINE AND METHANOL SOLUTIONS AT 320 °C UNDER GAMMA-IRRADIATION AND GAMMA RADIOLYSIS OF HYDRAZINE AND METHANOL

机译：肼和甲醇在γ射线辐照和γ射线辐照下于320°C在肼和甲醇溶液中对304不锈钢进行腐蚀试验

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

It has been pointed out that dissolved hydrogen is one of the key factors of PWSCC (primary water stress corrosion cracking) in the primary systems of pressurized water reactors. The authors consider that application of alternative reductant for hydrogen may mitigate PWSCC. The corrosion tests of 304 stainless steels in 2 mmol dm~(-3) methanol solution and 2 mmol dm'3 hydrazine solution at 320 °C were carried out under y-ray irradiation, and the corrosion environment was evaluated. Electrochemical corrosion potential (ECP) of the stainless steels was measured during the immersion tests. The ECP values were -605 mV and -643 mV vs. SHE in 2 mmol dm~(-3) hydrazine solution and 2 mmol dm~(-3) methanol solution at 320 °C, respectively. After the immersion tests, oxide films formed on the stainless steel specimens were analyzed with scanning probe microscope and X-ray diffraction. It is concluded that from the ECP measurement and comparison with previous results corrosion environment under following conditions is similar: (1) DH 1.5 ppm without irradiation, (2) methanol 2.9 ppm without irradiation, (3) hydrazine 2 mmol dm~(-3) under y-ray irradiation and (4) methanol 2 mmol dm~(-3) under y-ray irradiation. During the immersion tests, the test waters were sampled several times, and analyzed, in order to understand radiolysis of the methanol solution and the hydrazine solution at 320 °C. Hydrazine is decomposed predominantly through thermal decomposition, and an ammonia molecule is formed from a hydrazine molecule. Formaldehyde and ethylene glycol were detected in the methanol solution. But, carboxylates werenot detected. The present results do not demonstrate oxidation of methanol to CO or CO_2. It is pointed out that irradiation experiments of higher absorbed dose are necessary.
机译：已经指出，在压水反应堆的主要系统中，溶解氢是PWSCC（主要水应力腐蚀开裂）的关键因素之一。作者认为，将替代性还原剂用于氢可减轻PWSCC。在y射线照射下，于320 mmol的2 mmol dm〜（-3）甲醇溶液和2 mmol dm'3肼溶液中对304不锈钢进行了腐蚀试验，并评价了腐蚀环境。在浸没测试中测量了不锈钢的电化学腐蚀电位（ECP）。在320°C的2 mmol dm〜（-3）肼溶液和2 mmol dm〜（-3）甲醇溶液中，相对于SHE的ECP值分别为-605 mV和-643 mV。在浸没测试之后，用扫描探针显微镜和X射线衍射分析在不锈钢样品上形成的氧化膜。从ECP的测量和与先前结果的比较得出的结论是，在以下条件下腐蚀环境相似：（1）DH不辐照1.5 ppm，（2）甲醇不辐照2.9 ppm，（3）肼2 mmol dm〜（-3） ）在y射线照射下）和（4）y射线照射下2 mmol dm〜（-3）的甲醇。在浸泡测试过程中，对测试水进行了多次采样并进行了分析，以了解甲醇溶液和肼溶液在320°C时的辐射分解。肼主要通过热分解而分解，并且由肼分子形成氨分子。在甲醇溶液中检测到甲醛和乙二醇。但是，羧酸盐是 没有检测到。目前的结果没有证明甲醇氧化为CO或CO_2。指出需要更高吸收剂量的辐照实验。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号