As the main corrosion form of coal- or heavy oil-fired boilers,
sulfuric acid dew-point corrosion occurs when sulphur in fossil
fuels is converted to sulfuric acid at low temperature (<200 °C)
on various parts (economizers, air preheaters, chimneys, etc.) When
the service temperature is lowered to improve energy efficiency,
sulfuric acid dew-point corrosion becomes more serious.
09CrCuSb steel produced by appropriate alloy design, has been used
to reduce cost by increasing service time due to its excellent
sulfuric acid dew-point corrosion resistance.
09CrCuSb steel can be doped in a medium containing H₂SO₄, CL-, CL-
+ SO₄