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 .