The effect of temperature and ionic strength on iron carbonate (FeCO3) solubility limit
The effect of temperature and ionic strength on iron carbonate (FeCO3) solubility limit
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DOI：
10.1016/j.corsci.2009.03.009
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发表时间：
2009-06-01
影响因子：
8.3
通讯作者：
Woollam, Richard C.
中科院分区：
文献类型：
--
作者：
Sun, Wei;Nesic, Srdjan;Woollam, Richard C.
在CO2腐蚀中，碳酸铁的析出可显著降低底层钢的腐蚀速率。沉淀速率取决于碳酸铁溶解度极限的可靠计算。公开文献没有提供涵盖足够宽的参数范围的碳酸铁溶解度的表达式。本文根据文献数据建立了统一的碳酸铁溶解度（K-sp，mol（2）/L ~（-2））表达式：logK（sp）= -59.3498 - 0.041377T（k）- 2.1963/T-k +24.5724log（T-k）+ 2.518l（0.5）-0.657l。用这个统一方程所作的预测与已发表的实验数据符合得很好。(C)2009年由Elsevier Ltd.出版
In CO2 corrosion, precipitation of iron carbonate can significantly reduce the corrosion rate of the underlying steel. Precipitation rate depends on a reliable calculation of the iron carbonate solubility limit. The open literature does not provide an expression for iron carbonate solubility that covers a wide enough range of parameters. In this study a Unified iron carbonate solubility (K-sp in mol(2)/L-2) expression is developed based on the literature data:logK(sp) = -59.3498 - 0.041377T(k) - 2.1963/T-k + 24.5724 log(T-k) + 2.518l(0.5) - 0.657lwhich accounts for both temperature and ionic strength effects. The predictions made with this unified equation agree well with the published experimental data. (C) 2009 Published by Elsevier Ltd.