کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
188119 459652 2012 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical evaluation of the compatibility of fresh and aged Novec™ 71IPA with beryllium, stainless uranium, 304L stainless steel, and 2024-T3 aluminum alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Electrochemical evaluation of the compatibility of fresh and aged Novec™ 71IPA with beryllium, stainless uranium, 304L stainless steel, and 2024-T3 aluminum alloy
چکیده انگلیسی

This study was a material compatibility assessment of four metals (beryllium, stainless uranium, 304L stainless steel, and 2024-T3 aluminum) with an environmentally benign, non-aqueous, near-azeotropic mixture of hydrofluoroether (Novec™ 7100) with 4.5 wt% isopropanol designated Novec™ 71IPA. The intent is to use the Novec™ 71IPA to clean materials in sensitive, long-term assemblies. There is concern when an aged solvent is used to clean a metal surface, it may cause corrosion due to fluoride formation as the solvent ages. Two solvent conditions, one having no detectable fluoride (fresh) and the other with ≥17 ppm fluoride (aged) were evaluated. Electrochemical evaluations using impedance spectroscopy were performed to monitor the metal surfaces for signs of reaction. Microscopic and spectroscopic techniques, including X-ray photoelectron spectroscopy, were used to characterize the metal surfaces before and after electrochemical tests. Increased impedance was observed when beryllium substrates were exposed to fresh or aged Novec™ 71IPA and was attributed to formation of organic and/or inorganic films on native beryllium oxide. Other metals exhibited insignificant changes in impedance but did show some passive film formation. Results confirmed Novec™ 71IPA, containing up to 17 ppm fluoride, had no corrosive effect on the four tested metals and may be used to safely clean them.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 83, 30 November 2012, Pages 490–500
نویسندگان
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