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Încercarea materialelor. Materiale comerciale și cunoașterea mărfurilor, centrale energetice. Economie energetică (683) |
SM ISO690:2012 NANDINI, D., NITYANANDASHETTY, A.. Investigation of Influence of Medium pH and Sulfate Ion Concentrations on Corrosion Behavior of Magnesium Alloy ZE41. In: Электронная обработка материалов, 2014, nr. 2(50), pp. 49-56. ISSN 0013-5739. |
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Электронная обработка материалов | ||||||
Numărul 2(50) / 2014 / ISSN 0013-5739 /ISSNe 2345-1718 | ||||||
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CZU: 620.197 | ||||||
Pag. 49-56 | ||||||
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Magnesium alloys have emerged as potential structural materials with all capabilities to even replace close contenders; aluminium alloys in weight-critical applications. High susceptibility to corrosion being the only limitation, corrosion of magnesium alloys continues to gather much attention among the material scientists worldwide. ZE41 is one such alloy of magnesium which is increasingly gaining importance as automobile and aerospace material. In the present study the influence of the medium pH and sulfate ion concentrations on the corrosion behavior of magnesium alloy ZE41 has been investigated using electrochemical techniques like the Tafel extrapolation and electrochemical impedance spectroscopy (EIS). The tests have been carried out in a range of conditions, with gradually varying pH and sulfate ion concentration. The morphology and composition of the corroded alloy surface have been determined by the scanning electron microscopy (SEM) and energy dispersion X-ray (EDX) analysis, respectively. The recorded results reflect a trend of a higher corrosion rate associated with a higher sulfate concentration at each pH and with a lower pH at each sulfate concentration. |
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Cuvinte-cheie magnesium alloy ZE41, EIS, SEM, EDX |
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Cerif XML Export
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High susceptibility to corrosion being the only limitation, corrosion of magnesium alloys continues to gather much attention among the material scientists worldwide. ZE41 is one such alloy of magnesium which is increasingly gaining importance as automobile and aerospace material. In the present study the influence of the medium pH and sulfate ion concentrations on the corrosion behavior of magnesium alloy ZE41 has been investigated using electrochemical techniques like the Tafel extrapolation and electrochemical impedance spectroscopy (EIS). The tests have been carried out in a range of conditions, with gradually varying pH and sulfate ion concentration. The morphology and composition of the corroded alloy surface have been determined by the scanning electron microscopy (SEM) and energy dispersion X-ray (EDX) analysis, respectively. The recorded results reflect a trend of a higher corrosion rate associated with a higher sulfate concentration at each pH and with a lower pH at each sulfate concentration. </cfAbstr> <cfAbstr cfLangCode='RU' cfTrans='o'>Магниевые сплавы являются многообещающим конструкционным металлом и остаются главным конкурентом алюминиевых сплавов в областях, где важны весовые характеристики. Их основной недостаток – высокий уровень подверженности коррозии, поэтому борьба с коррозией магниевых сплавов находится в центре внимания исследователей в области материаловедения во всем мире. Сплав Mg-Zn-RE (ZE41) часто используется в автомобильной промышленности и авиастроении. Целью данной работы было изучение влияния водородного показателя (pH) среды и концентрации ионов сульфата аммония на устойчивость к коррозии сплава ZE41. Применялись такие известные в электрохимии методики, как импедансная электрохимическая спектроскопия и поляризационные измерения. Опыты проводились при постепенном изменении pH и концентрации ионов сульфата аммония. Структура и состав поверхности сплава, подвергшегося коррозии, анализировались с помощью сканирующего электронного микроскопа и рент- геноструктурного анализатора на основе метода энергетической дисперсии, соответственно. 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