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عنوان فارسی مقاله:
تجزیه و تحلیل شکست تغییر رنگ لبه مخزن سوخت گالوانیزه
عنوان انگلیسی مقاله:
Failure analysis of edge discoloration of galvanized fuel tank
سال انتشار : 2015
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مقدمه انگلیسی مقاله:
1. Introduction
Hot-dip galvanizing is known as the most common technique for protection of steel sheets and structural sections from atmospheric corrosion although it can affect the forming characteristics of steel [1]. Due to the competitive manufacturing of coated sheets, there is an increased interest to produce high quality galvanized steel sheets with minimum defects [2]. Nevertheless, in spite of vast progresses in science and technology of galvanizing process, production of defect free coatings remained a problem, particularly in continuous hot-dip galvanizing. Microstructural defects reduce the formability and corrosion resistance of steel sheet and macroscopic defects damage the surface quality to such extent that may lead to down grading the products in applications with high surface quality requirement, e.g. automobile panel [3,4]. Hot dip galvanizing process usually carried out at a bath temperature of 460 5 8C, while galvannealing is carried out at 525 10 8C. One of the common defects, appeared as dull surface appearance on coated steel sheets, is known as discoloration that produces dull regions on the surface of galvanized coatings. The defect is usually produced due to combination of lower line speed and thickness section [5]. The operational issues usually encountered during typical galvanizing and galvannealingprocess affect the product quality. Characterization of the surface defect using optical and scanning electron microscopy aids in understanding the cause of the defects and helps in designing preventive measures to be taken. In our present study, the surface defect was characterized by visual inspection, optical microscopy, scanning electron microscopy (SEM) and energy dispersive spectroscopic analysis (EDS) to understand the source and mechanism of the defects.
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کلمات کلیدی:
Corrosiveness of Fuels During Storage Processes | InTechOpen https://www.intechopen.com/...of-fuels/corrosiveness-of-fuels-during-storage-processes by M Ziółkowska - 2015 Feb 4, 2015 - Part of the steel or metal surface is wetted with water, which forms thin (from ... Corrosion is also a problem during fuel storage in storage tanks. Recent Case Studies in Engineering Failure Analysis Articles - Elsevier https://www.journals.elsevier.com/case-studies-in-engineering-failure.../recent-articles Failure analysis of a first stage IN738 gas turbine blade tip cracking in a thermal power plant .... Failure analysis of edge discoloration of galvanized fuel tank. Quench Discoloration | American Galvanizers Association https://www.galvanizeit.org/education-and-resources/...faq.../quench-discoloration Mar 11, 2015 - My galvanized coating was stained an unsightly yellow color when it was dipped in the chromate quench tank. What happened? First of all, it is ... [PDF]Coated Steel Sheets - Nippon Steel & Sumitomo Metal Corporation https://www.nssmc.com/product/catalog_download/pdf/U008en.pdf Metal Corporation is renowned for its coated steel sheets. Nippon Steel .... Fuel tank. AV equipment, electronic device home appliance. OA equipment. Automobile ..... Discoloration and high thermal resistance in high-temperature application. [PDF]HOT DIP GALVANIZED STEEL SHEET www.jfe-steel.co.jp/en/products/sheets/catalog/b1e-004.pdf JFE's wide range of hot dip galvanized products include pure zinc coated, .... Door, fender, trunk lid, hood, fuel tank, etc. Others ...... 1) The coated layer may be dissolved, discolored, etc. by degreasing, washing, use of lubricating oils for. [PDF]Durability Performance of Fuel-Tank Steels in Bio-Diesel Fuels - SASFT www.sasft.org/.../Durability%20Performance%20of%20Fuel-Tank%20Steels%20in%... Peter Mould. Strategic Alliance for Steel Fuel Tanks (SASFT). March 3-4, 2010 ... Nisshin Steel. Posco. Sumitomo Metal .... Discolored. 4. LCS HD Galvannealed ... Searches related to discoloration of galvanized fuel tank is diesel fuel corrosive engineering failure examples engineering failures in the last 10 years engineering failure case studies case studies in engineering failure analysis pdf engineering failures 2016 aluminum, diesel fuel tank, corrosion is gasoline corrosive to metal
