Abstract
This paper presents the effect of an Ammonium sulphate (NH4)2 SO4) leak mixed in the boiler feed water system on the microstructure, chemistry, metallurgy and mechanical properties of the water tube boiler. Tube specimens were water tube and super-heated tube materials made from ferritic-pearlitic steel alloy grade SA-210-Gr.A1 and ferritic steel grade SA213-Gr.T22, respectively. Specimens were obtained from different height levels of the boiler and tested. The results from the emission spectrometer revealed that the carbon (C) and sulfur (S) did not concentrate inside the tube during five days of operation. Whereas the operating temperature causes the change in the microstructure and mechanical properties due to a segregation of phase and change of mechanical properties (hardness and tensile) in the used tube.
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