An analysis - Premature failure of heat trace stainless tube

(in lingua inglese)

From the above analysis, it is concluded that sulfur-di-oxide present in the blast furnace exhaust gas gets oxidized into HSO3 in presence of moisture and oxygen at an elevated temperature. Sulfur-tri-oxide in turn gets converted to sulfuric acid in presence of moisture and thus the sulfuric acid reacts with tube material and promotes corrosion.

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Articolo Case Studies in Engineering Failure Analysis, 2013


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