| 摘要 |
PURPOSE:To improve the corrosion resistance of Be or a Be alloy in hot water or hot steam by forming a dense oxide film on the surface of the metal by mild preoxidation in hot water. CONSTITUTION:Be of >=97% purity contg. O2, C, Al, Fe, etc. as impurities or a Be alloy contg. <0.2% Fe, <0.1% Al, <0.05% Cr and <0.05% Ni as adding elements is held in hot water at 50-100 deg.C under ordinary pressure or in hot water or steam at 100-320 deg.C under 1-120atom. for several min - about 1,000hr to form a dense and homogeneous oxide film of 0.1-1.0mum thickness on the surface by preoxidation. Superior corrosion resistance in environment contg. hot water or hot steam is provided. |
