A method for lowering the corrosion potential on components formed from carbon steel, alloy steel, stainless steel, nickel based alloys, or cobalt based alloys, and exposed to high-temperature water comprised of oxidizing species, comprising: providing a reducing species in the high temperature water that can combine with the oxidizing species, and forming the component to have a catalytic layer of a platinum group metal.

Method for reducing corrosion of components exposed to high-temperature water

A method of extending the life of components of newly constructed nuclear reactors or newly replaced components of existing reactors is taught The method involves forming a deposit on the surfaces of metallic elements of the nuclear containment, as well as on the surfaces of internal components which are exposed to high-temperature, high-pressure water and steam The deposit formed is a deposit of at least one member of the platinum group of metals The deposit is formed by any of a number of conventional methods such as electroless deposition, electrochemical deposition, chemical vapor deposition, sputtering or other conventional method In operation, this deposit facilitates the combination of hydrogen and oxygen to form water and thereby aids in reducing the electrochemical corrosion potential of the system to values below a critical potential range that prevents stress corrosion cracking

Method of providing extended life expectancy for components of boiling water reactors

A new article of manufacture, for example a faucet or other article of hardware, has a specified decorative color, other than brass, and is resistant to corrosion, abrasion and attack by chemicals. The article includes a substrate, one or more corrosion resistant layers applied to the substrate, and an outer layer, applied by PVD, and chosen from only one or more of Zr, Hf, C and N. The outer layer provides the desired, other than brass, color of the article, the desired chemical and abrasion resistance, and which layer, when in contact with air or water becomes passive in a manner similar to chrome.

Decorative corrosion and abrasion resistant coating

A method of reducing flow assisted corrosion of a carbon steel component exposed to flowing low-oxygen water is disclosed. The method comprises forming a coating of a platinum group metal on the carbon steel component, and providing a ratio of hydrogen to oxygen of about 1:8 or greater in the water.

Method for reducing flow assisted corrosion of carbon steel components

Multilayer material comprising a zirconium-based substrate coated with a multilayer coating, the multilayered coating comprising metal layers composed dematieres same or different selected from chromium, an alloy of chromeouun ternary alloy Nb-Cr-Ti system. Such a material has improved oxidation resistance in accidental conditions of a nuclear reactor. The invention also relates to a multilayer coating, a piece composed in whole or part of the multilayer material or revetementmulticouche and the method of manufacturing the multicouchetel material as for example a magnetron sputtering method.

Multilayer material resistant to oxidation in a nuclear environment

A process for improving the corrosion resistance and hydrogen absorption resistance of zirconium alloy to be used, for example, in a light water nuclear reactor environment, comprises sputtering a layer of hafnium ions onto the zirconium alloy and implanting the hafnium ions with xenon ion doses of 3 x 1016 ions/ cm2.

Improving corrosion resistance of zirconium alloys

An implantation method for the improvement of the corrosion resistance and hydrogen absorption resistance of zirconium alloys in a light water nuclear reactor environment includes the steps of sputtering a layer of hafnium ions onto a zirconium alloy and the implanting the hafnium ions with xenon doses of 3×1016 ions/cm2.

David Lee Baty

Papers

Improving corrosion resistance of zirconium alloys

Ion implantation of zirconium alloys with hafnium