摘要
以胜利陆上混合原油为研究对象,进行了窄馏分性质研究及工业装置腐蚀挂片试验。总结了原油中腐蚀性物质的腐蚀规律,指出:无机氯盐的腐蚀主要发生在120-310℃;环烷酸腐蚀为230-420℃;硫化合物腐蚀为120-480℃。盐类的腐蚀是水解生成氯化氢;硫化物的腐蚀主要是元素硫和硫化氢的腐蚀;环烷酸腐蚀有两个显著的温度区,且环烷酸的腐蚀与流动状态有关。加工高酸高硫原油时,环烷酸、元素硫和硫化氢引起的腐蚀会相互促进,使腐蚀加剧。
The properties of narrow oil fractions have been studies and coupon tests have been performed on commercial units based upon Mixed Shengli Inland crudes. The corrosion laws of corrosive materials in the crudes have been summarized. It is found out that the corrosion of inorganic chloride salt mainly occurs at a temperature range of 120 - 130℃, corrosion of naphthenic acid at 230 - 420 ℃, and corrosion sulfide at 120 - 480 ℃ . The salt corrosion is caused by the hydrogen chloride formed by hydrolysis of salt. The corrosion of sulfide is mainly the corrosion of hydrogen sulfide. The corrosion of naphthenic acid obviously develops in two temperature ranges and is affected by the flow conditions. In processing high-acidic and high-sulfur crude oils, napththenic acid, elemental sulfur and hydrogen sulfide corrosions will promote each other, thus accelerating the corrosion rate.
出处
《石油化工腐蚀与防护》
CAS
2004年第6期9-13,共5页
Corrosion & Protection In Petrochemical Industry
关键词
原油
盐类分布
硫分布
酸分布
crude oil, salt distribution, sulfur distribution, acid distribution
