【摘要】 对常减压蒸馏装置减压炉失效炉管的材质、工况、腐蚀形貌、化学成分、力学性能、金相组织以及腐蚀产物进行了全面分析与研究,结果表明,炉管管壁发生大面积腐蚀的腐蚀原因为环烷酸腐蚀;油气中含有的高温硫、硫化氢及氯化氢促进了环烷酸腐蚀;油气在炉管内的流速和流态也起到了重要作用。提出了通过选用耐腐蚀材料、控制流速与流态和添加高温缓蚀剂来减少减压炉炉管腐蚀的措施。更多还原

【Abstract】 The corrosion of the failed tubes of vacuum furnace in atmospheric -vacuum distillation was extensively analyzed via studying metallurgy, work condition,corrosion form, chemical constitution, mechanical character, metallurgical structure and corrosion products. It was found that the corrosion causes of large scale corrosion of tube wall was the naphthenic acid corrosion. It was suggested that one can use resistant materials, high temperature corrosion inhibitor, control the flow rate and pattern to reduce the corrosion.更多还原