热力发电2018，Vol.47Issue(2)：131-137,7.DOI:10.19666/j.rlfd.201706045
电站锅炉复合有机胺停用保护剂机理研究及工程应用
Mechanism study and application of composite organic amine shutdown protection agent for power plant boiler
摘要
Abstract
A composite organic amine shutdown protection agent for power plant boiler was developed in this study.And the effects of its reaction temperature and concentration on the protective effects were investigated.Polarization curve method,wet and hot corrosion test,scanning electron microscopy,X-ray energy dispersive spectroscopy and X-ray diff action were used to study its protection mechanism.The results showed that,when the concentration of complex organic amine was 100 mg/L,pH was 10.0,and the temperature was kept at 300 ℃ for 4 h,the surface film forming of carbon steel and passivation protection effects were the best.Under the action of complex organic amine molecules,the closely linked ultrafme Fe3O4 spherical particles generated on the surface of the carbon steel specimens.At the same time,the carbon steel specimens physically adsorbed part of organic amine molecules to form a dense protective film.This protective film significantly reduced its corrosion current density and the wet and hot corrosion speed,and then obviously improved its corrosion resistance.This composite organic amine agent was applied to the protection of a 1 000 MW supercritical direct air-cooled boiler during the shutdown period.A complete and dense protective film was formed on the internal surface of power plant thermal equipment,and its breakdown time in deaerator by the acid copper sulfate was greater than 35 seconds,which exhibited great corrosion resistance.关键词
电站锅炉/复合有机胺/停用保护/保护机理/保护膜/耐蚀性能Key words
power plant boiler/composite organic amine/shutdown protection/protection mechanism/protective film/corrosion resistance分类
信息技术与安全科学引用本文复制引用
张贵泉,宁军,贺旺民,位承君,文慧峰,龙国军,姚建涛..电站锅炉复合有机胺停用保护剂机理研究及工程应用[J].热力发电,2018,47(2):131-137,7.基金项目
国家自然科学基金项目(51401163)National Natural Science Foundation of China (51401163) （51401163）
