翻訳と辞書 Words near each other ・ Metal Church (Wayne album) ・ Metal Circus ・ Metal clay ・ Metal Construction Association ・ Metal corset ・ Metal Crüe ・ Metal deactivator ・ Metal Dead ・ Metal detector ・ Metal Discharge ・ Metal dithiolene complex ・ Metal Down Under ・ Metal Drift ・ Metal Duck ・ Metal Dungeon ・ Metal dusting ・ Metal Edge ・ Metal electrode leadless face ・ Metal Evolution ・ Metal expansion joint ・ Metal fabrication ・ Metal faced insulating sandwich panels ・ Metal Fangs ・ Metal Fatigue ・ Metal Fatigue (album) ・ Metal Fatigue (novel) ・ Metal Fatigue (video game) ・ Metal Female Voices Fest ・ Metal Fighter ・ Metal Fighter Miku Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Metal dusting ： ウィキペディア英語版 Metal dusting Metal dusting is "a catastrophic form of corrosion that occurs when susceptible materials are exposed to environments with high carbon activities."〔(Fischer-Tropsch Archive )〕 The corrosion manifests itself as a break-up of bulk metal to metal powder. The suspected mechanism is firstly the deposition of a graphite layer on the surface of the metal, usually from carbon monoxide (CO) in the vapour phase. This graphite layer is then thought to form metastable M3C species (where M is the metal), which migrate away from the metal surface. However, in some regimes no M3C species is observed indicating a direct transfer of metal atoms into the graphite layer.〔On the Mechanism of Metal Dusting Corrosion (no date) C.M. Chun, J.D. Mumford and T.A. Ramanarayanan ()〕 The temperatures normally associated with metal dusting are high (300–850 °C).〔 From a general understanding of chemistry, it can be deduced that at lower temperatures, the rate of reaction to form the metastable M3C species is too low to be significant, and at much higher temperatures the graphite layer is unstable and so CO deposition does not occur (at least to any appreciable degree). Very briefly, there are several proposed methods for prevention or reduction of metal dusting; the most common seem to be Aluminide Coatings, alloying with copper and addition of steam.〔()〕 There is a significant amount of literature in existence that describes proposed mechanisms, prevention methods etc. There is also a good summary of metal dusting and some prevention methods in 'Corrosion by Carbon and Nitrogen - Metal Dusting, Carburisation and Nitridation' 〔Corrosion by Carbon and Nitrogen - Metal Dusting, Carburisation and Nitridation; Grabke, H.J., Schütze, M.; ''Woodhead Publishing'' 2007〕 == References == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Metal dusting」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.