石油与天然气化工Issue(1)：102-106,5.DOI:10.3969/j.issn.1007-3426.2016.01.021
LNG工厂停产状态下循环冷却水腐蚀性研究
Study on the corrosivity of the recirculating cooling water during shutdown in LNG plant
摘要
Abstract
In order to better control the water quality so as to inhibit the corrosion and scaling ,the characteristics of the recirculating cooling system during shutdown state were studied .Related to chemical dosing cases and operating procedures , chemicals were screened and chemical dosing program were optimized .The designed chemical scheme were proved to be feasible by analyzing the water quality data and coupon corrosive test results .The study showed that since there were more dirts such as slime and corrosion products depositing in the pipeline under the shutdow n state ,under‐deposit corrosion is prone to occur and the effects of corrosion inhibitors are degraded by reducing the contact between the metal surfaces and inhibitors .Cycles of concentration (CoC) is the key factor for the function of the corrosion inhibitors .Considering the high residence time of the chemicals in water at high CoCs ,it would be better to choose the stable and persistant chemicals .Correspondingly ,the chemicals need to be replaced w hen the CoC is reduced significantly .关键词
循环冷却水系统/腐蚀/结垢/浓缩倍数/药剂更换Key words
recirculating cooling water system/corrosion/fouling/cycles of concentration (CoC)/chemical replacement分类
能源科技引用本文复制引用
杨烨,何骁..LNG工厂停产状态下循环冷却水腐蚀性研究[J].石油与天然气化工,2016,(1):102-106,5.基金项目
国家自然科学基金“薄层液膜下分子自组装型气相缓蚀剂作用行为与缓蚀机理研究”（51101066）。 （）
