Corrosion of aluminium and magnesium in BFS composite cements
Corrosion of aluminium and magnesium in BFS composite cements
复制标题
BFS复合水泥中铝和镁的腐蚀
DOI：
10.1179/174367606x120142
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发表时间：
2006
影响因子：
2.2
通讯作者：
M. Hayes
中科院分区：
文献类型：
--
作者：
A. Setiadi;N. Milestone;J. Hill;M. Hayes
在英国，由核燃料后处理产生的遗留放射性废物被归类为中间水平废物（ILW），其中含有铝和镁等物质。采用高炉矿渣（BFS）复合水泥包埋ILW。这些水泥具有较高的pH值，这有利于限制某些放射性物质的迁移，但会引起金属的腐蚀。本文介绍了BFS复合水泥中铝、镁腐蚀的一些基本方面。铝的腐蚀在铝和水泥之间形成了一个多孔的界面，其中含有一系列的bayerite （Al(OH)3）和strätlingite （2CaO.Al2O3.SiO2.8H2O）。镁的主要腐蚀产物为水镁石（Mg(OH)2），多孔区不明显。大块水泥的水化作用似乎不受这些金属腐蚀的影响。
Legacy radioactive wastes arising from reprocessing of nuclear fuels in the UK are classified as intermediate level waste (ILW), which contain things such as aluminium and magnesium. Blast furnace slag (BFS) composite cements are used to encapsulate ILW. These cements have a high pH which is advantageous to limit the mobility of some of the radioactive species but can cause corrosion of metals. The present paper describes some fundamental aspects of corrosion of aluminium and magnesium in BFS composite cements. The corrosion of aluminium produced an interface between aluminium and cement which was porous with a series of zones containing bayerite (Al(OH)3) and strätlingite (2CaO.Al2O3.SiO2.8H2O). With magnesium, the main corrosion product was found to be brucite (Mg(OH)2) and the porous zone was less pronounced. The hydration of the bulk cement did not appear to be affected by the corrosion of these metals.