文摘： The inhibition of corrosion of iron in 2M itric acid and 2M sulfuric acid solutions by substituted phenylphydantoin, hiohydantiin, and dithiohydantoin compounds was measured using thermometric, weight loss, and polarization methods. The three methods gae consitstent results. The polarization curves indicated that the hydantoin compounds act as mixed-type inhibvitors. The adsorption of the inhibitors were found to obey the Temkin adsorption isotherm. The higher inhibition efficiency of the additives in nitric with respect to sulfuric acid solution may be attributed to he reduced formation of soluble quaternary nmitrogen salts in nitric acid medium, favouring adsorption of the parent additive on the metal surface. The obtained results indicate that the corrosion rate of iron in both acids increases with increasing temperature, both in absence and presence of the tested inhibitors. Kinetic-thermodynamic model functions and Temkin isotherm data are compared and discussed. The synergistic effect of halide anion on the inhibition efficiency of the hydantoin compounds was also investigated.  关于协会 协会网刊 化工年鉴 政策法规 展会信息 化工园区

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Inhibition Effect of Hydantoin Compounds on the Corrosion of Iron in Nitric and Sulfuric Acid Solutions
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 库名: 外文馆藏期刊题录数据库
 ID代码:WTL20020531099527
 分类号:TQ
 第一作者单位：Chemistry Department, Faculty of Science, Tanta University, 31527 Tanta,
Egypt
 页数：14
 年卷期:V.132 N.2 2001
 语种： eng
 刊名： Monatshefte fur Chemie Chemical Monthly
Montel Williams Loans
 作者：Loutfy H.Madkour
 出版年：2001

3.  文摘：
The inhibition of corrosion of iron in 2M itric acid and 2M sulfuric acid solutions by substituted
phenylphydantoin, hiohydantiin, and dithiohydantoin compounds was measured using
thermometric, weight loss, and polarization methods. The three methods gae consitstent
results. The polarization curves indicated that the hydantoin compounds act as mixed-type
inhibvitors. The adsorption of the inhibitors were found to obey the Temkin adsorption
isotherm. The higher inhibition efficiency of the additives in nitric with respect to sulfuric acid
solution may be attributed to he reduced formation of soluble quaternary nmitrogen salts in
nitric acid medium, favouring adsorption of the parent additive on the metal surface. The
obtained results indicate that the corrosion rate of iron in both acids increases with increasing
temperature, both in absence and presence of the tested inhibitors. Kinetic-thermodynamic
model functions and Temkin isotherm data are compared and discussed. The synergistic effect
of halide anion on the inhibition efficiency of the hydantoin compounds was also investigated.
 关于协会 协会网刊 化工年鉴 政策法规 展会信息 化工园区
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Inhibition Effect of Hydantoin Compounds on the Corrosion of Iron in Nitric and Sulfuric Acid Solutions
download book
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 库名: 外文馆藏期刊题录数据库
 ID代码:WTL20020531099527
 分类号:TQ
 第一作者单位：Chemistry Department, Faculty of Science, Tanta University, 31527 Tanta,
Egypt
 页数：14
 年卷期:V.132 N.2 2001
 语种： eng
 刊名： Monatshefte fur Chemie Chemical Monthly
Montel Williams Loans
 作者：Loutfy H.Madkour
 出版年：2001
 文摘：
The inhibition of corrosion of iron in 2M itric acid and 2M sulfuric acid solutions by substituted
phenylphydantoin, hiohydantiin, and dithiohydantoin compounds was measured using
thermometric, weight loss, and polarization methods. The three methods gae consitstent
results. The polarization curves indicated that the hydantoin compounds act as mixed-type
inhibvitors. The adsorption of the inhibitors were found to obey the Temkin adsorption
isotherm. The higher inhibition efficiency of the additives in nitric with respect to sulfuric acid
solution may be attributed to he reduced formation of soluble quaternary nmitrogen salts in
nitric acid medium, favouring adsorption of the parent additive on the metal surface. The
obtained results indicate that the corrosion rate of iron in both acids increases with increasing
temperature, both in absence and presence of the tested inhibitors. Kinetic-thermodynamic
model functions and Temkin isotherm data are compared and discussed. The synergistic effect
of halide anion on the inhibition efficiency of the hydantoin compounds was also investigated.
 关于协会 协会网刊 化工年鉴 政策法规 展会信息 化工园区

6. free book
download book
联系我们
free book
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电话：010-64437120 传真：010-64437120
地址：北京市朝阳区亚运村安慧里四区16楼716室 邮 编：100723
技术支持：北京勤云科技发展有限公司