کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
595817 1454027 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Diffuse reflection spectroscopy as a tool to measure low surface coverage of metal substrates by metallic oxide particles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Diffuse reflection spectroscopy as a tool to measure low surface coverage of metal substrates by metallic oxide particles
چکیده انگلیسی

Deposition of particles from a circulating fluid is a common industrial problem causing fouling or radioactive contamination in circuits of nuclear power plants. A few experimental methods have been developed to study the adhesion process of particles in order to determine the deposition kinetics. This work describes a setup based on diffusion reflectometry of visible light to perform real-time in-situ measurements. The deposition of magnetite and hematite particles onto stainless steel was studied by recording spectra of reflected visible light for several surface-coverage values. Scanning electron microscopy has shown that magnetite particles do not form a uniform layer. Simulations of the evolution of the reflected intensity as a function of the deposited amount of both oxides were performed on the basis of their absorption coefficients and particle sizes. The agreement between theoretical and experimental results shows that diffuse reflection spectroscopy could be a helpful in-situ method of quantifying fouling kinetics of metallic surfaces.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 345, Issues 1–3, 5 August 2009, Pages 219–223
نویسندگان
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