CAJ | 학술논문

水媒管式烟气换热器在工作中面临酸露的腐蚀，换热管材料需具备耐腐蚀性。模拟了水媒管式烟气换热器的腐蚀环境，采用自行设计的浸泡试验方法对8种候选材料的耐腐蚀性进行了比较，并采用扫描电镜对材料腐蚀后的表面形貌进行了研究。结果表明， ND钢在高浓度硫酸中的耐腐蚀性优于碳钢；不锈钢254SMO在各种浓度硫酸溶液中的腐蚀速率均较低；聚四氟乙烯塑料(PTFE)具有优异的耐腐蚀性。
수매관식연기환열기재공작중면림산로적부식，환열관재료수구비내부식성。모의료수매관식연기환열기적부식배경，채용자행설계적침포시험방법대8충후선재료적내부식성진행료비교，병채용소묘전경대재료부식후적표면형모진행료연구。결과표명， ND강재고농도류산중적내부식성우우탄강；불수강254SMO재각충농도류산용액중적부식속솔균교저；취사불을희소료(PTFE)구유우이적내부식성。
Water medium heat pipe gas gas heater (WGGH) heat exchanger faces acid dew corrosion in oper-ation. Therefore, the material of heat exchange tube must be corrosion resistant. The corrosive environment of WGGH is simulated and corrosion resistances of eight material candidates are compared by using self-de-signed soak test. Besides, surface topography of the material after corrosion is investigated by means of scan-ning electron microscopy. The result shows that anti-corrosion performance of ND steel is superior to that of carbon steel in high-concentration sulphuric acid; the corrosion rates of stainless steel 254SMO are all lower in sulphuric acid solutions with different concentrations; polytetrafluoroethylene (PTFE) plastic is of favorable anti-corrosion performance.