Document Details

Document Type : Article In Journal 
Document Title :
Effect of strong acids on the electrochemical behavior Ni89P11 glassy alloy
تاثير الاحماض القويه على السلوك الكهروكيميائى لسبيكة Ni89P11 زجاجية الخواص
 
Subject : Scientific Research 
Document Language : English 
Abstract : The effect of the H2SO4 and H3PO4 concentration and immersion times on electrochemical amorphous Ni89P11 alloy using electrochemical polarization and impedance techniques is carried out at 30°C .The formation of elemental phosphorus plus NiS or P2O5 on the alloy surface in H2SO4 or H3PO4 solution respectively, are confirmed by XPS method and the formation of Nickel oxides is excluded. In both acids, a passive region is observed, and a gradual increase of the current density continues, indicating that the dissolution of Ni through the passive film is occurring. Nyquist plots exhibited only one capacitive semicircle with an open end in most of applied frequency ranges. The capacitive loop mainly due to the charge transfer resistance of the alloy. The existence of another capacitive loop sometimes confirms the diffusion process on the passive layer. 
ISSN : 1012-1319 
Journal Name : Science Journal 
Volume : 4 
Issue Number : 1 
Publishing Year : 1428 AH
2008 AD 
Article Type : Article 
Added Date : Tuesday, July 24, 2012 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
سناء طاهر عربArab, Sanaa TaherResearcherDoctoratedr.s.arab@hotmail.com

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