تفاصيل الوثيقة

نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
Structural effects and mechanism of the inhibition of acid corrosion of steel by some dithiocarbamate derivatives
Structural effects and mechanism of the inhibition of acid corrosion of steel by some dithiocarbamate derivatives
 
الموضوع : كيمياء 
لغة الوثيقة : الانجليزية 
المستخلص : The study of the inhibition efficiency of related dithiocarbamates was undertaken using gasometry, mass loss and potentio-dynamic polarization methods. The compounds studied have the general formula RR′NCSS-Na, where R = H, CH3 or C2H2 and R′ = CH3, C2H5, C4H7, or C6H5. The studies showed that the compounds act as good inhibitors for the acid dissolution of steel in 1M H2SO4. The protection efficiency of the mono-substituted compounds increases as the electron density at the functional group and the bulk of the substituents increase. Polarization measurements indicated that these compounds act as mixed-type inhibitors. This is interpreted to mean that the compounds retard the rate of hydrogen evolution on the metal by affecting the mechanism of the reaction. Additional evidence for a change over in mechanism was also obtained from temperature studies of the inhibition process at five temperatures ranging from 30-50°C. It was observed that the enthalpy of activation increased by a factor of 2 to 3 in the presence of the inhibitors. In addition, the direction and sign of the entropy of activation supports the same principle. 
ردمد : 0010-9371 
اسم الدورية : Corrosion Prevention and Control 
المجلد : 38 
العدد : 3 
سنة النشر : 1412 هـ
1991 م 
نوع المقالة : مقالة علمية 
تاريخ الاضافة على الموقع : Monday, December 26, 2011 

الباحثون

اسم الباحث (عربي)اسم الباحث (انجليزي)نوع الباحثالمرتبة العلميةالبريد الالكتروني
B A Abd El-NabeyEl-Nabey, B A Abdباحثدكتوراه 
عباس عباس العوضيEl-Awady, Abbas Aباحثدكتوراهabbaselawady@hotmail.com
سعدالله قاري عزيزAziz, Saadullah Gباحثدكتوراهsaziz@kau.edu.sa

الملفات

اسم الملفالنوعالوصف
 31780.pdf pdfAbstract

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