管内腐蚀结垢是影响锅炉安全运行的主要因素之一,为了研究高温高压下锅炉管内的腐蚀结垢过程,在一定工况下进行挂片实验,利用SEM,EDS,XRD等分析手段,结合称重法,得出以下结论:金属表面的腐蚀结垢层分3层,依次为:氧化层、中间层、结垢层;腐蚀结垢过程也分为3个阶段:氧化膜形成期,结垢迅速成长期,稳定期;浓度的增加会促进金属的腐蚀和结垢速率;表面粗糙度增加对腐蚀的影响不大,但会促进结垢。 In order to study the process of corrosion and fouling in the boiler tube under high temperature and high pressure, couponing experiments were carried out under certain operating conditions. The analysis methods such as SEM, EDS, XRD and so on, Heavy method, come to the following conclusions: corrosion of metal surface scaling layer 3, followed by: oxide layer, the middle layer, scaling layer; corrosion scaling process is also divided into three stages: the formation of oxide film, scaling Rapid growth period and stable period; the increase of concentration will promote the corrosion and scaling rate of metal; the increase of surface roughness has little effect on corrosion, but it will promote the scaling.