Evaluation of Iron Aluminide Weld Overlays for Erosion-Corrosion Resistant Boiler Tube Coatings in Low NOx Boilers

Regina, J.R.

Oak Ridge National Laboratory

关键词: Corrosion;    Boilers;    Alloys;    Testing;    Burners;   

DOI  :  10.2172/814460
RP-ID  :  ORNL/SUB/95-SU604/03
RP-ID  :  AC05-00OR22725
RP-ID  :  814460

美国|英语

来源: UNT Digital Library

【 摘 要 】

Iron aluminide weld overlays containing ternary additions and thermal spray coatings are being investigated for corrosion protection of boiler tubes in Low NOx burners. The primary objective of the research is to identify overlay and thermal spray compositions that provide corrosion protection of waterwall boiler tubes. In the current phase of work, preliminary corrosion tests were conducted on a binary Fe-Al alloy in multiple complex gases to determine which gases will be used for testing of the ternary alloys. Preliminary solid-state corrosion tests were also conducted to simulate slag-metal interactions seen in Low NOx furnaces. Two powder compositions were chosen for testing of the ternary alloys. A matrix of alloys to be tested in both gaseous and solid-state corrosion experiments was produced based on corrosion literature.