کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5352114 1503678 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improvement in corrosion resistance of a nodular cast iron surface modified by plasma beam treatment
ترجمه فارسی عنوان
بهبود مقاومت در برابر خوردگی یک سطح چدن خاکستری اصلاح شده توسط درمان پرتوهای پلاسما
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
Nodular cast iron (NCI) specimens with corrosion-resistant surfaces were fabricated by plasma beam treatment and tempering (400 °C, 1 h), which consisted of plasma surface melting, plasma surface melting + tempering, plasma surface alloying and plasma surface alloying + tempering. In this manner, near-surface graphite nodules were eliminated, and inter-dendrites and eutectics with a hyper-eutectic structure appeared on the modified surfaces, as indicated by SEM. The corrosion behaviour of treated specimens in 3.5 wt% NaCl was characterised by electrochemical methods and compared with that of an untreated NCI specimen at 25 °C. The corrosion resistance ranked as follows: surface-alloyed and tempered specimen > surface-alloyed specimen ≈ surface-melted and tempered specimen > surface-melted specimen > the untreated NCI specimen. Metallographic as well as electrochemical corrosion studies illustrate the beneficial effects of surface modification in refining the microstructure and in enhancing the corrosion resistance of NCI.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 286, 1 December 2013, Pages 334-343
نویسندگان
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