α-Fe_2O_3、Fe_3O_4和Cr_2O_3在熔融Na_2SO_4中的溶解度

中国腐蚀与防护学报

1987, Vol. 7

Issue (1): 1-7

研究报告

本期目录 | 过刊浏览

α-Fe_2O_3、Fe_3O_4和Cr_2O_3在熔融Na_2SO_4中的溶解度

张允书;RobertA.Rapp

中国科学院上海冶金研究所;美国俄亥俄州立大学

SOLUBILITIES OF α-Fe_2O_3, Fe_3O_4 AND Cr_2O_3 IN FUSED Na_2SO_4 AT 1200K

Zhang Yunshu (Shanghai Institute of Metallurgy;Academia Sinica) Robert A. Rapp (The Ohio State University;U.S.A.)

全文: PDF(599 KB)

摘要: 作者于1200K在1大气压氧和几个低氧压下测定了α-Fe_2O_3及Fe_3O_4及Cr_2O_3在熔融Na_2SO_4中的溶解度与Na_2SO_4熔盐碱度的关系,结果与热力学预示是一致的。在测量溶解度的基础上,确定了这几种金属氧化物在熔融Na_2SO_4中碱性和酸性溶解的溶质形式,计算了它们在该熔盐中的活度系数。金属氧化物溶解行为的研究将有助于了解热腐蚀的盐溶机理和电化学机理。

Abstract：The solubilities of α-Fe_2O_3, Fe_3O_4 and Cr_2O_3 in fused Na_2SO_4 have been measured as a function of Na_2SO_4 melt basicity at 1200K and at 1 arm and lower oxygen pressures. Results are in agreement with the thermodynamic expectations. From the solubility measurements, the basic and acidic solutes of the oxides in molten Na_2SO_4 have been derived and their activity coefficients have also been determined. The solubility studies may be of assistance in understanding fluxing and electrochemical mechanisms of hot corrosion.

收稿日期: 1987-02-25

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引用本文:

张允书;RobertA.Rapp. α-Fe_2O_3、Fe_3O_4和Cr_2O_3在熔融Na_2SO_4中的溶解度[J]. 中国腐蚀与防护学报, 1987, 7(1): 1-7.
. SOLUBILITIES OF α-Fe_2O_3, Fe_3O_4 AND Cr_2O_3 IN FUSED Na_2SO_4 AT 1200K. J Chin Soc Corr Pro, 1987, 7(1): 1-7.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1987/V7/I1/1

[1] Gupta, D. K.; Rapp, R. A. J. Electrochem. Soc., 127, 2194, 2656(1980)
[2] Jose, P. D.; Gupta, D. K; Rapp, R. A., ibid., 132, 735 (1985)
[3] Zhang, Y. S.; Rapp, R. A.,ibid., 132 , 734 , 2498(1935)
[4] Zhang, Y. S., ibid., 133, 655 (1986)
[5] Deanhardt, M. L.; Stern, K. H, ibid., 128 , 2577(1981)

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