首页> 外国专利> Modification of oxide film electrical conductivity to maintain low corrosion potential in high-temperature water

Modification of oxide film electrical conductivity to maintain low corrosion potential in high-temperature water

机译:修改氧化膜电导率以保持在高温水中的低腐蚀电位

摘要

A method for mitigating general corrosion and crack initiation and growth on the surface of metal components in a water-cooled nuclear reactor. A compound containing a non-noble metal such as zirconium or titanium is injected into the water of the reactor in the form of a solution or suspension. This compound decomposes under reactor thermal conditions to release ions or atoms of the non-noble metal which incorporate in the surfaces of the components, including the interior surfaces of any cracks formed therein. The preferred compounds are zirconium compounds such as zirconium acetylacetonate, zirconium nitrate and zirconyl nitrate. Zirconium incorporated in the oxided surface of a metal component will reduce the electrochemical corrosion potential at the surface to a level below the critical potential to protect against intergranular stress corrosion cracking without the addition of hydrogen.
机译:一种减轻水冷核反应堆中金属部件表面普遍腐蚀和裂纹萌生和扩展的方法。将包含锆或钛等非贵金属的化合物以溶液或悬浮液的形式注入反应器的水中。该化合物在反应器热条件下分解,释放出非贵金属的离子或原子,这些离子或原子掺入部件的表面,包括其中形成的任何裂纹的内表面。优选的化合物是锆化合物,例如乙酰丙酮锆,硝酸锆和硝酸氧锆。掺入金属成分的氧化表面中的锆将使表面的电化学腐蚀电位降低至低于临界电位的水平,以防止在不添加氢的情况下防止晶间应力腐蚀开裂。

著录项

相似文献

  • 专利
  • 外文文献
  • 中文文献
获取专利

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