Name : The 46th Conference of Coal Science
Number : 46
Location : [in Japanese]
Date : November 26, 2009 - November 27, 2009
Pages 54-55
In coal fired power plant, the concentration of H_2S becomes higher in the burner area that is the strong reducing atmosphere. Therefore, the boiler tubes are damaged due to the sulfide corrosion. The damaged tube should be repaired by buildup welding or thermal spraying. If the damage by sulfide corrosion is large, the boiler tubes need to be replaced. Thus, these repairs cost becomes large. To deal with this problem, we have developed an economical and straight forward technique of coating for preventing sulfide corrosion since 2004. We succeeded in development of compound film (SiO_2/TiO_2/C/TiO_2) that have superior corrosion resistant to 10% or less.
