期刊
CORROSION SCIENCE
卷 164, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2019.108356
关键词
Neutron absorbing material; Al-B4C metal matrix composites; Surface chemical treatment; Boric acid corrosion; Oxide film
资金
- National Natural Science Foundation of China (NSFC) [51671122, 51871144]
- Jiangsu Haicore Technology Joint Stock Co., Ltd.
The effects of surface chemical treatment (ST), which is a combination of acid and alkaline cleaning to remove surface impurities, on the corrosion behavior of an Al-B4C metal matrix composite (MMC) in boric acid solutions at 40 degrees C and 90 degrees C were investigated. SEM and TEM analysis revealed duplex-layer surface scales, consisting an outer layer of blade-like strips and a continuous amorphous inner layer. The outer layers have similar thicknesses, while the impurity-containing samples (without ST) have thicker inner layers, in which the interfaces between the impurities and surrounding oxide scale were acted as fast inward diffusion channels of oxygen.
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