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The effect of hydrogen chloride on the corrosion of an FeCrAlY alloy in simulated coal gasifier atmospheres

✍ Scribed by K. S. Coley; K. Blick; J. E. Rhoades-Brown

Publisher
John Wiley and Sons
Year
1989
Tongue
German
Weight
870 KB
Volume
40
Category
Article
ISSN
0947-5117

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✦ Synopsis

An iron chromium aluminium yttrium steel was exposed to a simu-Ein Chrom-Aluminium-Yttrium-Stahl wurde einer simulierten Kohlevergasungsatmosphare ausgesetzt, die lo00 ppm bzw. 2200 ppm Chlorwasserstoff enthielt und deren Temperatur 450 "C betrug. Durch Erhohen des Chlorwasserstoffgehalts werden die Reaktionsgeschwindigkeit erhoht und die Mikrostruktur sowie die Zusammensetzung des Korrosionsprodukts betrachtlich verandert. Fur diese Ergebnisse werden versuchsweise Mechanismen postuliert, nach denen Metallchloride uber die Gasphase transportiert werden. lated coal gasifier atmosphere containing 1000 ppm and 2200 ppm hydrogen chloride at 450 ' C. Increasing hydrogen chloride content was found to accelerate reaction rates, and significantly alter the microstructure and composition of the corrosion product. Tentative explanations for these results, involving vapour phase transport of metal chlorides are proposed.

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