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Materials for SO2/SO3 2

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JEBoone

JEBoone

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I am evaluating a reactor design that would have SO2/SO3 mixtures at about 1000F. What are the alternatives for materials of construction. In a dry system is aluminumized SS necessary?
 
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Even 12% chromium ferritic stainless steels are good to 700C in SO2 environments. If you want protection to 800C, move up to a 16% chromium grade. So, aluminizing is not necessary.
 
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