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
2期
61-64
,共4页
换热器管束%穿孔%腐蚀原因分析%防护措施
換熱器管束%穿孔%腐蝕原因分析%防護措施
환열기관속%천공%부식원인분석%방호조시
heat exchanger tube%pitting%corrosion%cause analysis%prevention measures
通过现场勘察和检验检测分析，认为某石化公司重整装置预加氢进料换热器管束的腐蚀外表面较内表面严重得多。管柬外表面的腐蚀主要是H2S等腐蚀性介质引起的较严重的均匀腐蚀，且局部结垢形成垢下腐蚀，因活性阴离子的存在而导致局部发生腐蚀穿孔。在分析失效原因的基础上，从设计、工艺和材料等方面提出了防腐蚀措施。
通過現場勘察和檢驗檢測分析，認為某石化公司重整裝置預加氫進料換熱器管束的腐蝕外錶麵較內錶麵嚴重得多。管柬外錶麵的腐蝕主要是H2S等腐蝕性介質引起的較嚴重的均勻腐蝕，且跼部結垢形成垢下腐蝕，因活性陰離子的存在而導緻跼部髮生腐蝕穿孔。在分析失效原因的基礎上，從設計、工藝和材料等方麵提齣瞭防腐蝕措施。
통과현장감찰화검험검측분석，인위모석화공사중정장치예가경진료환열기관속적부식외표면교내표면엄중득다。관간외표면적부식주요시H2S등부식성개질인기적교엄중적균균부식，차국부결구형성구하부식，인활성음리자적존재이도치국부발생부식천공。재분석실효원인적기출상，종설계、공예화재료등방면제출료방부식조시。
The site investigation, inspection and testing concluded that the external surface of feed heat exchanger tubes of the prehydrotreater of a catalytic reformer suffered from corrosion more seriously than the internal surface. The corrosion of the external surface was mainly the uniform corrosion by corrosive media such as H2S, the under deposit corrosion by local fouling and pitting corrosion due the presence of active anions. Corrosion prevention measures have been recommended in respect of design, process and material selection on the basis of failure cause analysis.
