METAL GRATING USED IN ATOMIC REACTOR CONTAINER

摘要

PROBLEM TO BE SOLVED: To provide a metal grating that may be used for a long period of time causing no peeling of a coated film and marked corrosion under an irregular high-pressure hot-water environment expected in design and excellent in scratch resistance and corrosion resistance under a regular use environment.SOLUTION: A metal grating used in an atomic reactor container comprising; (1) a steel having a hot-dip plating film containing zinc and aluminum as a base material, a chemical conversion coating film on that surface and an epoxy resin-based coating film having a thickness of 50 to 1000 μm containing no metal powder as an anti-corrosive pigment as an upper layer; (2) a steel having a blast-treated surface or a ground surface as a base material, a coated film having a thickness of 50 to 200 μm containing a metal zinc powder and a metal aluminum powder on that surface and an epoxy resin-based coating film having a thickness of 50 to 1000 μm containing no metal powder as an anti-corrosive pigment as an upper layer; or (3) a stainless steel containing 17 mass% or more of chromium as a base material. Such metal gratings are disposed on appropriate parts in the atomic reactor container.