Investigation and Analysis of High Temperature Corrosion and Degradation of Marine Boiler Combustion Swirler  

作　　者：RS Virdi DG Thakur 

机构地区：[1]Defence Institute of Advanced Technology (DU), Pune 411 025 (MS), India

出　　处：《Journal of Marine Science and Application》2016年第1期86-94,共9页船舶与海洋工程学报（英文版）

摘　　要：The present paper investigated and analyzed swirler material consisting of mild steel which was subjected to service for the period of one year in a 30 MW marine boiler. Due to the presence of high temperatures in the furnace coupled with the corrosive marine environment swirler material showed accelerated degradation and material wastage. An investigation into the feasibility of manufacturing the existing swirler with an alternate material or coating the swirler material with a thermal barrier coating was undertaken. Based on their properties and performance, SS 304 and SS 316 were proposed as the replacement materials for the swirler. The other alternative of coating the existing swirlers with a form thermal barrier coating to observe for any improvement in their performance at elevated temperatures was also tested. Stellite, which is a Ni-Co based coating, was carried out on the MS samples and the same were exposed to same temperatures mentioned above. The performance of the available options was evaluated with respect to the grain structure of the material, the hardness value of the materials and deterioration at elevated temperatures. Investigation showed the proposed materials/ coatings like SS 304, SS 316 and Stellite coating revealed that SS 316 is the material best suited for high temperature application.

关 键 词：marine boiler CORROSION DEGRADATION high temperature SWIRLER stainless steel 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TK224.94[金属学及工艺—金属材料]