| 摘要 |
PURPOSE:To provide a titled structural member which prevents nodular corrosion in water or steam of a high temp. and high pressure by coating an element of any among Ti, V, Nb and W on the surface of the structural member consisting of a Zr alloy contg. Sn, Fe, Cr, Ni, Nb, etc. CONSTITUTION:The element of any among Ti, V, Nb, W is coated on the surface of the structural member consisting of zircaloy-4 consisting of about 1.5wt% Sn, about 0.2% Fe, about 0.1% Cr, about 0.1% O and the balance Zr, zircaloy-2 consisting of about 1.5% Sn, about 0.15% Fe, about 0.1% Cr, about 0.05% Ni, about 0.1% O and the balance Zr, Nb-Zr alloy contg. about 1-3% Nb, etc. to provide the structural member consisting of the Zr alloy. The generation of nodular corrosion is obviated even if such member is used for a long period in the high-temp. and high-pressure water or steam. The member obvaites the deterioration in the ductility arising from the special heat treatment and the deterioration in the corrosion resistance of the weld zone and is suitable for use in an atomic reactor. |
