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Hot rolled clad plates for application in flue gas desulfurization (FGD)‐systems
Author(s) -
MalinaAltzinger U.,
Ornig H.,
Schimböuck R.
Publication year - 1992
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19920430606
Subject(s) - metallurgy , materials science , corrosion , cladding (metalworking) , base metal , alloy , welding , intergranular corrosion , crevice corrosion , brazing , pitting corrosion , composite material
A newly developed roll cladding technique is described in this article. This so called on‐line‐technique allows roll claddings with materials that were not yet considered to be suitable for roll cladding. Herewith it was made possible to successfully produce hot rolled clad plates with base metal RSt 37‐2 and clad metals 1.4529, alloy 625, alloy C‐22 and alloy C‐276. Several investigations were made on these clad plates: The mechanical and technological properties of the base metal and the clad metals all met the specified limits. The plates showed excellent bonding behaviour. The microstructures of the claddings were free of precipitates. The corrosion resistance of the claddings was checked using standard tests, and compared with solution or soft annealed solid plates: The resistance against intergranular corrosion was tested in the Streicher test according to ASTM or SEP, in the ASTM G28B‐test and in the Huey test. The susceptibility to pitting or crevice corrosion was checked by determination of CPT and CCT according to ASTM or Cabot. In all these tests the corrosion resistance was equivalent to the corresponding solid materials. Finally the welding process of such clad plates is outlined, and some experiences in FGD‐plants are reported.