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Corrosion resistance of cast steel in hydroxylamine sulphate solution

✍ Scribed by Dr. habil. M. Holtzer; M.Sc.Eng. S. Piwowarski

Publisher
John Wiley and Sons
Year
1994
Tongue
German
Weight
340 KB
Volume
45
Category
Article
ISSN
0947-5117

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✦ Synopsis

Abstract

In hydroxylamine sulphate production processes fittings made from cast steel 18Cr‐10Ni failed after short working periods due to inadequate corrosion resistance. By means of weight loss measurements different austenitic and austenitic‐ferritic grades of cast steel with higher amount of alloying elements were tested in cold hydroxylamine sulphate solution before hydrolysis and in hot solution after second reactor. Cast steel types 20Cr‐25Ni and 25Cr‐6Ni have shown the highest corrosion resistance. The laboratory results were verified by industrial tests where gate valves made from cast steel type 20Cr‐25Ni after 4 years of working period are still in a good state.

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✍ Dr. M. Holtzer; M. Sc. Eng. Z. Dzioba πŸ“‚ Article πŸ“… 1992 πŸ› John Wiley and Sons 🌐 German βš– 476 KB

## Abstract The results of studies on the Alonizing of cast carbon steel and of testing the corrosion resistance of this cast steel in an atmosphere containing 5 to 6% SO~2~ + 50% SO~3~ at 853 K are described and compared with the results obtained with unalonized cast carbon steel and high‐alloy 23