The influence of dissolved oxygen concentration on the corrosion of grey cast iron in water at 50°C
The influence of dissolved oxygen concentration on the corrosion of grey cast iron in water at 50°C
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DOI：
10.1016/0010-938x(79)90037-4
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发表时间：
1979
影响因子：
8.3
通讯作者：
D. Smith;B. Mcenaney
中科院分区：
文献类型：
--
作者：
D. Smith;B. Mcenaney
研究了灰口铸铁在50°C流动水中的腐蚀结垢与氧气浓度(0.1~3.95 ppm O2)的关系。低于1.0ppm O2，结节状鳞片含有Fe3O4和绿色铁锈，GR。在较高的O2浓度下，最终形成一个连续的膜，由Fe2O4+GR的多孔亚层和致密的Fe3O4+GR结壳和薄的γ-FeOOH层组成。沿着水流方向的“烟囱”是从地壳长出来的。γ-FeOOH被还原为Fe3O4，成为结垢的主要成分。来自集中供暖系统的铸铁部件上的鳞片与本工作中发现的非常相似。
The formation of corrosion scales has been studied on grey cast iron in flowing water at 50°C as a function of O2concentrations from 0.1 to 3.95 ppm O2. Below 1.0 ppm O2, nodular scales form containing Fe3O4and a green rust, GR. At higher O2concentrations, a continuous scale eventually forms, consisting of a porous subscale of Fe2O4+ GR overlaid with a compact crust of Fe3O4+ GR and a thin surface layer of γ-FeOOH. ‘Chimneys’ oriented in the water flow direction grow out of the crust. γ-FeOOH is reduced to Fe3O4which becomes the principal constituent of the scale. Scales on cast iron components from central heating systems closely resemble those found in the present work.