减二线馏分油中炼厂常用钢材的动态冲刷腐蚀行为
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摘要
为了更好地解决炼厂在流动条件下减二线馏分油对管路的腐蚀问题,研究了流动条件下Q235碳钢和Cr5Mo合金钢的耐环烷酸和硫冲刷腐蚀性能,并与炼厂常用钢材渗铝碳钢和304不锈钢进行比较。结果表明:Cr5Mo钢的腐蚀速率明显小于Q235钢的,酸值越大两者的腐蚀差别越明显(酸值>5 mg KOH/g);随着酸值和硫含量的增大,Q235钢腐蚀速率有明显增大的趋势; Cr5Mo钢的腐蚀速率随着酸值的增大基本保持不变,甚至有一定的下降;相比于Q235(腐蚀速率6.3 mm/a)和Cr5Mo钢(腐蚀速率1.5 mm/a),渗铝碳钢和304不锈钢表现出优异的耐冲刷腐蚀性能,渗铝碳钢腐蚀速率为0.2 mm/a,而304不锈钢几乎没有失重。
In order to figure out the corrosion problem of the pipeline in secondary vacuum gas oil under flow condition,the erosion corrosion behaviors of Q235 steel and Cr5Mo steel under naphthenic acid and sulfur erosion conditions were studied,which were further compared with those of aluminizing carbon steel and 304 stainless steel commonly used in refinery. Results showed that the corrosion rate of Cr5Mo was much lower than that of Q235,and the difference of their corrosion rates became more obvious with the increase of acid value( higher than 5 mg KOH/g). The corrosion rate of Q235 steel presented increasing trend as the acid value and sulfur content increased. On the contrary,the corrosion rate of Cr5Mo steel changed little and even decreased slightly with improving acid value. In the comparison of Q235( 6. 3 mm/a of corrosion rate) and Cr50 Mo steel( 1.5 mm/a of corrosion rate),aluminizing carbon steel and 304 stainless steel exhibited more excellent erosion corrosion resistance. The corrosion rate of aluminizing carbon steel was 0.2 mm/a while 304 stainless steel possessed almost no weight loss.
In order to figure out the corrosion problem of the pipeline in secondary vacuum gas oil under flow condition,the erosion corrosion behaviors of Q235 steel and Cr5Mo steel under naphthenic acid and sulfur erosion conditions were studied,which were further compared with those of aluminizing carbon steel and 304 stainless steel commonly used in refinery. Results showed that the corrosion rate of Cr5Mo was much lower than that of Q235,and the difference of their corrosion rates became more obvious with the increase of acid value( higher than 5 mg KOH/g). The corrosion rate of Q235 steel presented increasing trend as the acid value and sulfur content increased. On the contrary,the corrosion rate of Cr5Mo steel changed little and even decreased slightly with improving acid value. In the comparison of Q235( 6. 3 mm/a of corrosion rate) and Cr50 Mo steel( 1.5 mm/a of corrosion rate),aluminizing carbon steel and 304 stainless steel exhibited more excellent erosion corrosion resistance. The corrosion rate of aluminizing carbon steel was 0.2 mm/a while 304 stainless steel possessed almost no weight loss.
引文
[1]SMITH S N,PAKALAPATI R S.Thirty years of downhole corrosion experience at big Escambia Creek:Corrosion mechanisms and inhibition:Corrosion/2004[C].New Orleans(L.A):NACE International,2004:04744.
[2]NEVILLE A,REYES M,XU H.Examining corrosion effects and corrosion or erosion interactions on metals in slurry impingement[J].Tribology International,2002,35:643-650.
[3]祁静,唐庆武.原油的环烷酸腐蚀及防腐对策[J].石油化工设备技术,1994,4(15):47-53.
[4]吴欣强,敬和民,郑玉贵,等.碳钢在高温环烷酸介质中冲刷腐蚀行为[J].中国腐蚀与防护学报,2002,22(5):257-263.
[5]敬和民,郑玉贵,姚治铭,等.环烷酸腐蚀及其控制[J].石油化工腐蚀与防护,1999,16(1):1-6.
[6]WU X Q,JING H M,ZHENG Y G,et al.Resistance of Mo-bearing stainless steels and Mo-bearing stainless-steel coating to naphthenic acid corrosion and erosion-corrosion[J].Corrosion Science,2004,46(4):1 013-1 032.
[7]ZHENG Y G,YAO Z M,WEI X Y,et al.The synergistic effect between erosion and corrosion in acidic slurry medium[J].Wear,1995,186-187:555-561.
[8]QU D R,ZHENG Y G,JING H M,et al.Erosion-corrosion of Q235 steel and Cr51/2Mo steels in oil with naphthenic acid and/or sulphur compound at high temperature[J].Materials and Corrosion,2005,56(8):533-541.
[9]TEBBAL S,KANE R D.Review of Critical Factors Affecting Crude Corrosivity:Corrosion/1996[C].Houston:NACE International,1996:607.
[10]YAO J S.Corrosion of chloride in continuous catalytic reformer and protection[J].Petrochemical Corrosion and Protection,2002,19(1):16-18.
[11]HUANG B S,YIN W F,SANG D H,et al.Synergy effect of naphthenic acid corrosion and sulfur corrosion in crude oil distillation unit[J].Applied Surface Science,2012,259:664-670.
[12]GROYSMAN A,BRODSKY N,PENNER J,et al.Study of Corrosiveness of Acidic Crude Oil and Its Fractions:Corrosion/2005[C].Houston:NACE International,2005:568.
[13]GROYSMAN A,BRODSKY N,PENNER J,et al.Low Temperature Naphthenic Acid Corrosion Study:Corrosion/2007[C].Houston:NACE International,2007:569.
[14]BOTA G M,QU D R,NESIC S.Napthenic Acid Corrosion of Mild Steel in the Presence of Sulfide Scales Formed in Crude Oil Fractions at High Speed:Corrosion/2010[C].Houston:NACE International,2010:353.
[15]PAVELKO G F.Correlation between thermochemical and antiscuff characteristics of organosulfur compounds[J].Journal of Friction and Wear,2012,33(6):443-452.
[16]LIU G Q,ZHANG X L,QU D R,et al.Naphthenic Acid Corrosion Characteristic and Corrosion Product Film Resistance of Carbon Steel and Cr5Mo Low Alloy Steel in Secondary Vacuum Gas Oil[J].Corrosion Engineering Science and Technology,2016,51(6):445-454.
[17]ZETLMEISL M J.A Laboratory and Field Investigation of Naphthenic Acid Corrosion Inhibition:Corrosion/1995[C].Houston:NACE International,1995:334.
[18]WU X Q,JING H M,ZHENG Y G,et al.Erosion-corrosion of various oil-refining materials in naphthenic acid[J].Wear,2004,256(1/2):133-144.
[19]屈定荣.高温环烷酸腐蚀、冲刷腐蚀及硫腐蚀的交互作用[D].[出版地不详]:中国科学院研究生院,2005.
[2]NEVILLE A,REYES M,XU H.Examining corrosion effects and corrosion or erosion interactions on metals in slurry impingement[J].Tribology International,2002,35:643-650.
[3]祁静,唐庆武.原油的环烷酸腐蚀及防腐对策[J].石油化工设备技术,1994,4(15):47-53.
[4]吴欣强,敬和民,郑玉贵,等.碳钢在高温环烷酸介质中冲刷腐蚀行为[J].中国腐蚀与防护学报,2002,22(5):257-263.
[5]敬和民,郑玉贵,姚治铭,等.环烷酸腐蚀及其控制[J].石油化工腐蚀与防护,1999,16(1):1-6.
[6]WU X Q,JING H M,ZHENG Y G,et al.Resistance of Mo-bearing stainless steels and Mo-bearing stainless-steel coating to naphthenic acid corrosion and erosion-corrosion[J].Corrosion Science,2004,46(4):1 013-1 032.
[7]ZHENG Y G,YAO Z M,WEI X Y,et al.The synergistic effect between erosion and corrosion in acidic slurry medium[J].Wear,1995,186-187:555-561.
[8]QU D R,ZHENG Y G,JING H M,et al.Erosion-corrosion of Q235 steel and Cr51/2Mo steels in oil with naphthenic acid and/or sulphur compound at high temperature[J].Materials and Corrosion,2005,56(8):533-541.
[9]TEBBAL S,KANE R D.Review of Critical Factors Affecting Crude Corrosivity:Corrosion/1996[C].Houston:NACE International,1996:607.
[10]YAO J S.Corrosion of chloride in continuous catalytic reformer and protection[J].Petrochemical Corrosion and Protection,2002,19(1):16-18.
[11]HUANG B S,YIN W F,SANG D H,et al.Synergy effect of naphthenic acid corrosion and sulfur corrosion in crude oil distillation unit[J].Applied Surface Science,2012,259:664-670.
[12]GROYSMAN A,BRODSKY N,PENNER J,et al.Study of Corrosiveness of Acidic Crude Oil and Its Fractions:Corrosion/2005[C].Houston:NACE International,2005:568.
[13]GROYSMAN A,BRODSKY N,PENNER J,et al.Low Temperature Naphthenic Acid Corrosion Study:Corrosion/2007[C].Houston:NACE International,2007:569.
[14]BOTA G M,QU D R,NESIC S.Napthenic Acid Corrosion of Mild Steel in the Presence of Sulfide Scales Formed in Crude Oil Fractions at High Speed:Corrosion/2010[C].Houston:NACE International,2010:353.
[15]PAVELKO G F.Correlation between thermochemical and antiscuff characteristics of organosulfur compounds[J].Journal of Friction and Wear,2012,33(6):443-452.
[16]LIU G Q,ZHANG X L,QU D R,et al.Naphthenic Acid Corrosion Characteristic and Corrosion Product Film Resistance of Carbon Steel and Cr5Mo Low Alloy Steel in Secondary Vacuum Gas Oil[J].Corrosion Engineering Science and Technology,2016,51(6):445-454.
[17]ZETLMEISL M J.A Laboratory and Field Investigation of Naphthenic Acid Corrosion Inhibition:Corrosion/1995[C].Houston:NACE International,1995:334.
[18]WU X Q,JING H M,ZHENG Y G,et al.Erosion-corrosion of various oil-refining materials in naphthenic acid[J].Wear,2004,256(1/2):133-144.
[19]屈定荣.高温环烷酸腐蚀、冲刷腐蚀及硫腐蚀的交互作用[D].[出版地不详]:中国科学院研究生院,2005.