石油化工腐蚀与防护
石油化工腐蝕與防護
석유화공부식여방호
PETROCHEMICAL CORROSION AND PROTECTION
2012年
2期
16-18,37
,共4页
晁君瑞%宦建波%王维宗%张中平%施伟力
晁君瑞%宦建波%王維宗%張中平%施偉力
조군서%환건파%왕유종%장중평%시위력
炼油装置%硫化物应力腐蚀%恒载荷法%应力环%门槛应力值
煉油裝置%硫化物應力腐蝕%恆載荷法%應力環%門檻應力值
련유장치%류화물응력부식%항재하법%응력배%문함응력치
refinery unit%sulfide stress corrosion%constant-load testing method%stress ring%threshold stress value
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。
對煉油工業中5種常用鋼材進行瞭腐蝕評價,旨在從腐蝕的角度為煉油裝置的閤理設計、選材、有效防護和開髮新的耐蝕材料提供依據。採用恆載荷法中的應力環研究瞭這5種材料在NACE飽和硫化氫溶液中的耐硫化物應力腐蝕性能,併對影響材料抗硫化物應力腐蝕性能的閤金成分、閤金組織等相關因素進行瞭討論。試驗結果錶明,在NACE飽和硫化氫溶液中,0Cr13和CF62抗SSCC的門檻應力值小于0.75倍的屈服彊度,16MnR的門檻應力值大于等于0.75倍的屈服彊度而小于0.95倍的屈服彊度,0Cr18Ni10Ti和316L門檻應力值大于等于0.95倍的屈服彊度,各種材料牴抗SSCC的能力從小到大的順序為0Cr13,CF62,16MnR,0Cr18Ni10Ti和316L。為保證煉油裝置的長週期安全運行,對于煉油裝置中硫化物應力腐蝕非常苛刻的環境,應首先攷慮316L和0Cr18Ni10Ti等牴抗硫化物應力腐蝕能力大的材料,諸如0Cr13和CF62等牴抗硫化物應力腐蝕能力小的材料要慎重選用。
대련유공업중5충상용강재진행료부식평개,지재종부식적각도위련유장치적합리설계、선재、유효방호화개발신적내식재료제공의거。채용항재하법중적응력배연구료저5충재료재NACE포화류화경용액중적내류화물응력부식성능,병대영향재료항류화물응력부식성능적합금성분、합금조직등상관인소진행료토론。시험결과표명,재NACE포화류화경용액중,0Cr13화CF62항SSCC적문함응력치소우0.75배적굴복강도,16MnR적문함응력치대우등우0.75배적굴복강도이소우0.95배적굴복강도,0Cr18Ni10Ti화316L문함응력치대우등우0.95배적굴복강도,각충재료저항SSCC적능력종소도대적순서위0Cr13,CF62,16MnR,0Cr18Ni10Ti화316L。위보증련유장치적장주기안전운행,대우련유장치중류화물응력부식비상가각적배경,응수선고필316L화0Cr18Ni10Ti등저항류화물응력부식능력대적재료,제여0Cr13화CF62등저항류화물응력부식능력소적재료요신중선용。
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.
