摘要
对炼油工业中5种常用钢材进行了腐蚀评价,旨在从腐蚀的角度为炼油装置的合理设计、选材、有效防护和开发新的耐蚀材料提供依据。采用恒载荷法中的应力环研究了这5种材料在NACE饱和硫化氢溶液中的耐硫化物应力腐蚀性能,并对影响材料抗硫化物应力腐蚀性能的合金成分、合金组织等相关因素进行了讨论。试验结果表明,在NACE饱和硫化氢溶液中,0Cr13和CF62抗SSCC的门槛应力值小于0.75倍的屈服强度,16MnR的门槛应力值大于等于0.75倍的屈服强度而小于0.95倍的屈服强度,0Cr18Ni10Ti和316L门槛应力值大于等于0.95倍的屈服强度,各种材料抵抗SSCC的能力从小到大的顺序为0Cr13,CF62,16MnR,0Cr18Ni10Ti和316L。为保证炼油装置的长周期安全运行,对于炼油装置中硫化物应力腐蚀非常苛刻的环境,应首先考虑316L和0Cr18Ni10Ti等抵抗硫化物应力腐蚀能力大的材料,诸如0Cr13和CF62等抵抗硫化物应力腐蚀能力小的材料要慎重选用。
The corrosion evaluation of 5 common steels in petroleum refining industry was performed to provide basis for the good design,proper material selection,effective corrosion protection and development of new materials for refinery process units.Constant load testing method was applied to study the SSCC resistance performance of these 5 materials in NACE saturated hydrogen sulfide solution.The result of test shows that,in NACE saturated hydrogen sulfide solution,the CF62＇s and 0Cr13＇s threshold stress value of resistance to SSCC is lower than 0.75 times of yield strength.16MnR＇s threshold stress value of resistance to SSCC is equal to or greater than 0.75 times of yield strength but lower that 0.95 times of yield of strength.The 0Cr18Ni9Ti＇s and 316L＇s threshold stress value of resistance to SSCC is greater than or equal to 0.95 times of yield strength.The order of threshold stress value of resistance to SSCC of different materials（from low to high） is 0Cr13,16MnR,0Cr18Ni10Ti and 316L.To ensure a long-term reliable operation of refinery process units,the materials with high resistance to SSCC,such as 316L and 0Cr18Ni10Ti,should be preferably selected.The material with low resistance to SSCC,such as 0Cr13 and CF62,should be selected with care.
出处
《石油化工腐蚀与防护》
CAS
2012年第2期16-18,37,共4页
Corrosion & Protection In Petrochemical Industry
关键词
炼油装置
硫化物应力腐蚀
恒载荷法
应力环
门槛应力值
refinery unit
sulfide stress corrosion
constant-load testing method
stress ring
threshold stress value
