DISTRIBUTION AND CHARACTERIZATION OF HIGH-TEMPERATURE AIR CORROSION PRODUCTS ON IRON CHROMIUM-ALLOYS BY RAMAN MICROSCOPY

被引:57
作者
GARDINER, DJ [1 ]
LITTLETON, CJ [1 ]
THOMAS, KM [1 ]
STRAFFORD, KN [1 ]
机构
[1] BRITISH GAS CORP,LONDON RES STN,LONDON,ENGLAND
来源
OXIDATION OF METALS | 1987年 / 27卷 / 1-2期
关键词
D O I
10.1007/BF00656729
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
Fe and Fe-Cr alloys containing 2, 5, 14, and 18% Cr were oxidized at 400, 600, and 850 degree C for 2 hr. In addition, samples were oxidized for 24 hr at 400 degree C to obtain thicker scales. The corroded samples showed varying distributions of Fe//2O//3, Fe//3O//4, Cr//2O//3, and FeCr//2O//4. Fe//2O//3 and Fe//3O//4 were formed on the pure iron and the 2 and 5% chromium alloys at all temperatures and on the 14% chromium alloy at 400 degree C. The 14 and 18% Cr alloys formed scales containing Cr//2O//3 and FeCr//2O//4 at the higher temperatures (600 and 850 degree C). Examples of small regions of Fe//2O//3 being formed within Cr//2O//3-FeCr//2O//4 scales are suggested as breakaway corrosion initiation sites.
引用
收藏
页码:57 / 72
页数:16
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