Reducing hot corrosion due to alkali metal and vanadium...

Details Reducing hot corrosion due to alkali metal and vanadium... Reducing hot corrosion due to alkali metal and vanadium...

C - Chemistry, Metallurgy

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C10L 1/12 (2006.01) C10L 1/14 (2006.01) C10L 10/04 (2006.01) C10L 1/18 (2006.01) C10L 1/24 (2006.01)

Patent

CA 1085614

REDUCING HOT CORROSION DUE TO ALKALI METAL AND VANADIUM CONTAMINATION ABSTRACT OF THE DISCLOSURE Hot corrosion of metal alloys in a high temper- ature gas stream, due to the presence of alkali metal contaminants (sodium and potassium) and vanadium is exhibited or reduced by the additional combined presence of chromium and magnesium in the gas stream. Petroleum fuel oils containing more than 0.5 ppm alkali metal and more than 0.5 ppm vanadium produce such corrosive gas streams when combusted. Magnesium compounds and chromium compounds are dissolved in such fuels to inhibit hot corrosion. Ratios of Cr: Na + K of about 4.5:1 and Mg:V of about 3:1 are preferred. Corrosion due to the presence of lead is also reduced by the presence of magnesium.

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