石油化工腐蚀与防护
石油化工腐蝕與防護
석유화공부식여방호
PETROCHEMICAL CORROSION AND PROTECTION
2011年
4期
50-52
,共3页
换热器%腐蚀%缓蚀剂
換熱器%腐蝕%緩蝕劑
환열기%부식%완식제
heat exchanger%corrosion%corrosion inhibitor
碳素钢在电解质溶液(例如水)中会形成微电池,碳素钢的基本金相组织为铁素体和渗碳体,在电解质溶液中会形成以低电位的铁素体为阳极,高电位的渗碳体为阴极的腐蚀电流,从而钢材受到腐蚀。中国石油兰州石化分公司合成橡胶厂苯乙烯装置的粗笨乙烯塔(C-53)和塔顶冷凝器(E-55)即存在上述腐蚀。通过在生产中加入复合中和缓蚀剂(EC-1108A)的方法,使腐蚀问题得到了克服。
碳素鋼在電解質溶液(例如水)中會形成微電池,碳素鋼的基本金相組織為鐵素體和滲碳體,在電解質溶液中會形成以低電位的鐵素體為暘極,高電位的滲碳體為陰極的腐蝕電流,從而鋼材受到腐蝕。中國石油蘭州石化分公司閤成橡膠廠苯乙烯裝置的粗笨乙烯塔(C-53)和塔頂冷凝器(E-55)即存在上述腐蝕。通過在生產中加入複閤中和緩蝕劑(EC-1108A)的方法,使腐蝕問題得到瞭剋服。
탄소강재전해질용액(례여수)중회형성미전지,탄소강적기본금상조직위철소체화삼탄체,재전해질용액중회형성이저전위적철소체위양겁,고전위적삼탄체위음겁적부식전류,종이강재수도부식。중국석유란주석화분공사합성상효엄분을희장치적조분을희탑(C-53)화탑정냉응기(E-55)즉존재상술부식。통과재생산중가입복합중화완식제(EC-1108A)적방법,사부식문제득도료극복。
Microcells will be formed when carbon steel is in the electrolyte solution.The ferrite and cementite,which are the basic metallurgraphic structure of carbon steel,will produce corrosion electric current in electrolyte solution with ferrite of low electric potential as anode and cementite of high electric potential as cathode.Therefore,the steel materials are corroded.As the above corrosion existed in the crude styrene tower(C-53) and tower overhead condenser(E-55) in the styrene unit of synthetic rubber plant of PetroChina Lanzhou Petrochemical Company,the addition of compound corrosion inhibitor(EC-1108A) in operation has effectively controlled the corrosion.