کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7168562 1462991 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Anomalous corrosion phenomena observed on electrovalves of coffee espresso machines
ترجمه فارسی عنوان
پدیده های خوردگی غیرمستقیم در دستگاه های الکتریکی ماشین های اسپرسو قهوه دیده می شود
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی
The domestic coffee machines market has widely expanded in the last five years. The core of these machines is an electro-pump that allows the correct water distribution. In this paper a root cause failure analysis was conducted utilizing some electro-pumps samples taken from a corroded batch. Several examinations were carried out in order to identify the root cause of the failure: visual examination, SEM-EDS analysis and microstructural characterization. The corrosion phenomenon is located at the piston-spring interface. As result of the examinations carried out, it has been possible to identify that the corrosion mechanism is due to different interacting factors: high chlorine concentration, potential dynamic difference between piston and spring materials, material sensitization and iron-manganese bacteria growth.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Failure Analysis - Volume 33, October 2013, Pages 449-456
نویسندگان
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