随着新环境保护法的实施以及国内环保要求的不断提高,作为炼油厂环保装置的核心环节的硫磺联合装置,如何在长周期中保持平稳运行的问题受到炼油厂的重视,也是目前石油化工企业环保生产的必要保障。本文根据GB/T 30579及API RP 571对某...随着新环境保护法的实施以及国内环保要求的不断提高,作为炼油厂环保装置的核心环节的硫磺联合装置,如何在长周期中保持平稳运行的问题受到炼油厂的重视,也是目前石油化工企业环保生产的必要保障。本文根据GB/T 30579及API RP 571对某石化公司硫磺联合装置包括的硫磺回收装置、溶剂再生装置、酸性水汽提装置依据现有实际工艺流程进行腐蚀机理的识别、腐蚀回路分析,并对回路进行腐蚀风险评估,同时结合案例分析预测每个腐蚀回路中的重点监控部位及建议。展开更多
Monitoring the service condition of concrete structures requires the quantitative assessment of properties and corrosion rate of structural steels surrounded by concrete.A multi-cell sensor system that included a refe...Monitoring the service condition of concrete structures requires the quantitative assessment of properties and corrosion rate of structural steels surrounded by concrete.A multi-cell sensor system that included a reference electrode,a chloride content sensor,a macrocell current unit and an electrical resistance measurement unit was developed.This system provided the following important electrochemical data in the cover-zone concrete on site:open circuit potential,macrocell current from anodes to cathode,chloride profile,concrete resistance and corrosion rate of built-in anodes.The experimental results show that the macrocell current increases when the chloride content in concrete is higher.Thus,monitoring the chloride content is a good method for monitoring the corrosion state.The chloride ion content and cover depth are the key factors that affect the electrical resistance of concrete.Without considering the temperature and time,a simplified model of the instantaneous corrosion rate of steel rebar in a concrete structure based on the measured chloride contents and concrete resistance was proposed.The test results further prove the reliability of this simplified predicting model.展开更多
文摘随着新环境保护法的实施以及国内环保要求的不断提高,作为炼油厂环保装置的核心环节的硫磺联合装置,如何在长周期中保持平稳运行的问题受到炼油厂的重视,也是目前石油化工企业环保生产的必要保障。本文根据GB/T 30579及API RP 571对某石化公司硫磺联合装置包括的硫磺回收装置、溶剂再生装置、酸性水汽提装置依据现有实际工艺流程进行腐蚀机理的识别、腐蚀回路分析,并对回路进行腐蚀风险评估,同时结合案例分析预测每个腐蚀回路中的重点监控部位及建议。
基金Project(200632800003-11) supported by Western Communications Construction Scientific and Technological Project in China
文摘Monitoring the service condition of concrete structures requires the quantitative assessment of properties and corrosion rate of structural steels surrounded by concrete.A multi-cell sensor system that included a reference electrode,a chloride content sensor,a macrocell current unit and an electrical resistance measurement unit was developed.This system provided the following important electrochemical data in the cover-zone concrete on site:open circuit potential,macrocell current from anodes to cathode,chloride profile,concrete resistance and corrosion rate of built-in anodes.The experimental results show that the macrocell current increases when the chloride content in concrete is higher.Thus,monitoring the chloride content is a good method for monitoring the corrosion state.The chloride ion content and cover depth are the key factors that affect the electrical resistance of concrete.Without considering the temperature and time,a simplified model of the instantaneous corrosion rate of steel rebar in a concrete structure based on the measured chloride contents and concrete resistance was proposed.The test results further prove the reliability of this simplified predicting model.
