Corrosion by Carbon and Nitrogen. Metal Dusting, by H Grabke, M Schütze

By H Grabke, M Schütze

Steel dusting is a sort of corrosion regarding the disintegration of metals and alloys right into a dirt of graphite and steel debris while uncovered to a carburizing surroundings. this crucial booklet stories the criteria affecting steel dusting and the way it may be avoided in sectors equivalent to the chemical and petrochemical industries and within the direct aid of iron ores. It additionally considers the comparable corrosion phenomena of carburization and nitridation.

After an introductory bankruptcy taking off the most important tactics fascinated by steel dusting, the e-book studies how this corrosion strategy impacts a number of metals akin to iron and metal, in addition to nickel-based and chromium-based high-temperature alloys. There are chapters at the results of specific gasoline combinations at the corrosion procedure and at the use of coatings to avoid steel dusting. strategies interested by carburization and nitridation also are defined and discussed.

With its exceptional editors and crew of members, Corrosion by means of carbon and nitrogen is a helpful reference for all these interested in knowing and combating those corrosion strategies in quite a few industries.

  • Reviews this corrosion procedure and the way it impacts the petrochemical and different industries
  • Discusses the influence of specific gasoline combos at the corrosion process

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Additional info for Corrosion by Carbon and Nitrogen. Metal Dusting, Carburisation and Nitridation

Example text

39. ; A. Rahmel and M. Schorr: Oxid. Metals 30 (1988) 95. 40. : H. J. Grabke: Appl Surface Sci. 165 (2000) 23–33. 41. D. J. Grabke: Corrosion NACE 2001 paper 1379. 42. ; J. J. Grabke: Mat. Corr. 54 (2003) 747. 43. M. Müller-Lorenz and M. Zinke: Mat. Corr. 54 (2003) 783. 44. C. and U. Brill, J. Wilson: Corrosion NACE 2002 paper 02372. 45. : Corrosion NACE 2001 (2001) 1379. 46. P. M. Müller-Lorenz: Mat. , 54 (2003) 860. 47. ; H. Viefhaus; G. J. M. Müller-Lorenz: Mat. Corr. 49 (1998) 330–335. 48. ; E.

In the next step in corrosion a surface carbide of M3C forms on Cr-depleted steel. This carbide is generally stable only in carbon-supersaturated environments, requiring a carbon activity in excess of unity to form. Carbon deposition In the next stage in the corrosion sequence, carbon, principally graphite, deposits on the M3C surface, whereby the carbon activity at the carbide/ graphite interface drops to unity. This destabilizes the M3C carbide and leads to its dissociation into iron particles and graphite.

10 Changes of metal dusting rate without and with H2S additions – logarithmic plot of metal wastage rates vs. 25Cr–Mo steel, a high-alloy 20Cr–32Ni steel (Alloy 800) and a cast 25Cr–20Ni steel (HK 40). 20 Corrosion by carbon and nitrogen Interruption of H2S addition resulted in acceleration of attack, and a new addition of H2S in retardation. 14) is established rapidly. But, for the three alloys, the sulphur effect is different. As described for iron on the low-alloy steel, continued cementite growth is observed.

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