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The corrosion behaviour of a wrought austenitic Fe-20Cr-32Ni steel, Alloy 800H, is studied in a simulated coal gasification atmosphere at 700 C. Exposures range from a few minutes up to 1000 hours. The influence of cerium upon corrosion resistance is established by carrying out identical tests after ion implantation of the specimen surfaces. The corrosive attack in the H(2)S-containing gas mixture can be reduced for the Ce-implanted material if the implantation dose is sufficiently high. In the case of both implanted and unimplanted material, sulphides and oxides are formed but the corrosion products of the implanted material show a higher Cr:Fe ratio than those of the unimplanted material. It is suggested that this feature is responsible for the observed improvement.

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Authors: STROOSNIJDER M F, JRC Petten Estab. (NL);NORTON J F, JRC Petten Estab. (NL);GUTTMANN V, JRC Petten Estab. (NL);BENNETT M J, Atomic Energy Research Estab., Harwell (GB);DE WIT J H W, Delft University of Technology (NL)
Bibliographic Reference: Paper presented: 6th International Conference of Surface Modifications of Metals by Ion Beams, Riva Del Garda (IT), Sept. 12-16, 1988
Availability: Available from (1) as Paper EN 34302 ORA
Record Number: 198910210 / Last updated on: 1994-12-01
Original language: en
Available languages: en