Method of reducing corrosion potential and stress corrosion cracking susceptibility in nickel-base alloys
    13.
    发明授权
    Method of reducing corrosion potential and stress corrosion cracking susceptibility in nickel-base alloys 有权
    降低镍基合金中腐蚀电位和应力腐蚀开裂敏感性的方法

    公开(公告)号:US06548178B2

    公开(公告)日:2003-04-15

    申请号:US10255432

    申请日:2002-09-26

    Abstract: A method for reducing in situ the electrochemical corrosion potential and susceptibility to stress corrosion cracking of a nickel-base alloy and boiling water nuclear reactor components formed therefrom when in contact with high temperature water. The method comprises the steps of: adding a metal hydride to the high temperature water; dissociating the metal hydride in the high temperature water to form a metal and at least one hydrogen ion; and reducing the concentration of the oxidizing species by reacting the hydrogen ions with an oxidizing species, thereby reducing in situ the electrochemical corrosion potential of the nickel-base alloy. The method may further include the steps of reacting the metal with oxygen present in the high temperature water to form an insoluble oxide and incorporating the metal into the surface of the nickel-base alloy, thereby reducing the electrical conductivity of the surface of the nickel-base alloy. A nickel-base alloy component having a reduced electrochemical corrosion potential is also disclosed.

    Abstract translation: 一种当与高温水接触时,由其形成的镍基合金和沸水核反应堆部件的电化学腐蚀电位和应力腐蚀开裂的易受影响的方法。 该方法包括以下步骤:向高温水中加入金属氢化物; 在高温水中解离金属氢化物以形成金属和至少一种氢离子; 并且通过使氢离子与氧化物质反应来降低氧化物质的浓度,从而原位降低镍基合金的电化学腐蚀电位。 该方法还可以包括以下步骤:使金属与存在于高温水中的氧反应形成不溶性氧化物并将金属掺入镍基合金的表面,从而降低镍 - 镍合金表面的导电性, 基体合金。 还公开了具有降低的电化学腐蚀电位的镍基合金组分。

    Method of reducing corrosion potential and stress corrosion cracking susceptibility in nickel-based alloys
    14.
    发明授权
    Method of reducing corrosion potential and stress corrosion cracking susceptibility in nickel-based alloys 有权
    降低镍基合金中腐蚀电位和应力腐蚀开裂敏感性的方法

    公开(公告)号:US06488782B2

    公开(公告)日:2002-12-03

    申请号:US09681148

    申请日:2001-01-29

    Abstract: Method for reducing in situ the electrochemical corrosion potential and susceptibility to stress corrosion cracking of a nickel-base alloy and boiling water nuclear reactor components formed therefrom when in contact with high temperature water. The method comprises the steps of: adding a metal hydride to the high temperature water; dissociating the metal hydride in the high temperature water to form a metal and at least one hydrogen ion; and reducing the concentration of the oxidizing species by reacting the hydrogen ions with an oxidizing species, thereby reducing in situ the electrochemical corrosion potential of the nickel-base alloy. The method may further include the steps of reacting the metal with oxygen present in the high temperature water to form an insoluble oxide and incorporating the metal into the surface of the nickel-base alloy, thereby reducing the electrical conductivity of the surface of the nickel-base alloy. A nickel-base alloy component having a reduced electrochemical corrosion potential is also disclosed.

    Abstract translation: 一种当与高温水接触时,由其形成的镍基合金和沸水核反应堆组件的电化学腐蚀电位和应力腐蚀开裂的易感性降低的方法。 该方法包括以下步骤:向高温水中加入金属氢化物; 在高温水中解离金属氢化物以形成金属和至少一种氢离子; 并且通过使氢离子与氧化物质反应来降低氧化物质的浓度,从而原位降低镍基合金的电化学腐蚀电位。 该方法还可以包括以下步骤:使金属与存在于高温水中的氧反应形成不溶性氧化物并将金属掺入镍基合金的表面,从而降低镍基合金表面的导电性, 基体合金。 还公开了具有降低的电化学腐蚀电位的镍基合金组分。

Patent Agency Ranking