硫酸中硫脲在纯铁上的吸附

中国腐蚀与防护学报

1989, Vol. 9

Issue (4): 327-332

研究报告

本期目录 | 过刊浏览

硫酸中硫脲在纯铁上的吸附

蒋馥华;夏远安;桂江虹;唐光土;李方胜

武汉钢铁学院;武汉钢铁学院;武汉钢铁学院;武汉钢铁学院;化学师资班八七届毕业生;武汉钢铁学院;化学师资班八七届毕业生

AN INVESTIGATION INTO THE ADSORPTION OF THIOUREA ON PURE IRON IN SULPHURIC ACID

Jiang Fuhua Xia Yunnan Gui Jianghong Tang Guangtu and Li Fangsheng (Wuhan Iron Steel University)

全文: PDF(519 KB)

摘要: <正> 一、引言有机物在电极表面上的吸附过程,可提供吸附分子之间以及它们和电极表面相互作用的有用信息。实践上,它与腐蚀抑制、化学电源、电镀、有机电合成等直接相关。汞电极表面上的吸附行为已有大量报道。固体电极上的研究困难较多,文献报道只涉及为数不多的一些体系。本工作研究20～60℃温度区间,0.5～2.0mol·dm~(-3)H_2SO_4中硫脲(TU)在纯铁上的吸附行为,通过对实验结果的分析找出相应的吸附等温式,确定有关的热力学参数。

Abstract：The adsorption behaviour of thiourea (TU) on pure iron was investigated in 0.5～2.0 mol·dm~(-3) H_2SO_4 over the temperature range of 20～60℃. The process was treated as a sabstitutional adsorption process. The degree of surface coverage increased with temperature and TU concentration. It was shown that at low TD concentrations the adsorption behaviour followed a Flory-Huggins isotherm with negligible lateral interaction. TU molecules were parallely adsorbed on the surface. At higher TU concentrations the molecules did not change their orientation, but the adsorption behaviour followed a Frumkin-type isotherm with strong lateral repulsion. The Gibbs energy, enthalpy and entropy of adsorption were calculated. The effect of temperature on the degree of surface coverage was at tributed to entropy, rather than enthalpy.

收稿日期: 1989-08-25

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	蒋馥华
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引用本文:

蒋馥华;夏远安;桂江虹;唐光土;李方胜. 硫酸中硫脲在纯铁上的吸附[J]. 中国腐蚀与防护学报, 1989, 9(4): 327-332.
. AN INVESTIGATION INTO THE ADSORPTION OF THIOUREA ON PURE IRON IN SULPHURIC ACID. J Chin Soc Corr Pro, 1989, 9(4): 327-332.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1989/V9/I4/327

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