孙亮,侯艳宏,杨席,张志恒,朱元强,王虎,唐鋆磊.炼油加工过程中氯离子与硫离子对 316L 不锈钢和Monel 合金腐蚀的影响[J].表面技术,2015,44(12):41-48.
SUN Liang,HOU Yan-hong,YANG Xi,ZHANG Zhi-heng,ZHU Yuan-qiang,WANG Hu,TANG Jun-lei.Effect of Chlorine Ion and Sulfur Ion on Corrosion of 316L Stainless Steel and Monel Alloy in Oil Refining Process[J].Surface Technology,2015,44(12):41-48
炼油加工过程中氯离子与硫离子对 316L 不锈钢和Monel 合金腐蚀的影响
Effect of Chlorine Ion and Sulfur Ion on Corrosion of 316L Stainless Steel and Monel Alloy in Oil Refining Process
投稿时间:2015-10-13  修订日期:2015-12-20
DOI:10.16490/j.cnki.issn.1001-3660.2015.12.007
中文关键词:  炼油  316L 不锈钢  Monel 合金  腐蚀  氯离子  硫离子
英文关键词:oil refining  316L stainless steel  Monel alloy  corrosion  chloride ions  sulfur ions
基金项目:
作者单位
孙亮 中海油惠州炼油分公司, 广东 惠州 516086 
侯艳宏 中海油惠州炼油分公司, 广东 惠州 516086 
杨席 西南石油大学 化学化工学院, 成都 610500 
张志恒 西南石油大学 化学化工学院, 成都 610500 
朱元强 西南石油大学 化学化工学院, 成都 610500 
王虎 西南石油大学 材料科学与工程学院, 成都 610500 
唐鋆磊 西南石油大学 化学化工学院, 成都 610500 
AuthorInstitution
SUN Liang CNOOC Huizhou Refinery, Huizhou 516086, China 
HOU Yan-hong CNOOC Huizhou Refinery, Huizhou 516086, China 
YANG Xi College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China 
ZHANG Zhi-heng College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China 
ZHU Yuan-qiang College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China 
WANG Hu College of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China 
TANG Jun-lei College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China 
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中文摘要:
      目的 研究常减压装置高温原油馏分及塔顶水相中氯离子、硫离子含量对 316L 不锈钢和 Monel合金(镍基合金)腐蚀的影响。 方法 通过腐蚀挂片实验,获得 316L 不锈钢和 Monel 合金在含不同浓度氯离子和硫离子的水相、油相中的腐蚀速率变化规律。 利用扫描电子显微镜,研究 316L 和 Monel 合金表面腐蚀后的微观形貌,探讨两种离子对 316L 不锈钢和 Monel 合金腐蚀的影响规律。 结果 在酸值较高的脱后原油中,316L 不锈钢和 Monel 合金的腐蚀速率分别为 0. 0091,0. 0248 mm/ a;在酸值较低的常二段馏分中,316L 不锈钢和 Monel 合金的腐蚀速率分别为 0. 0078,0. 0031 mm/ a。 在常二段馏分中,加入 600mg/ L 氯离子和 30 mg/ L 硫化钠时,316L 不锈钢和 Monel 合金的腐蚀速率分别为 0. 1755,0. 1707 mm/ a。在相同条件的脱后原油中,316L 不锈钢的腐蚀速率为 0. 0545 mm/ a,Monel 合金的腐蚀速率为 0. 1281mm/ a。 结论 油相中氯离子含量较低时,环烷酸腐蚀占主导因素;而氯离子含量达到较高水平后,氯离子对腐蚀的影响占主导作用。 316L 不锈钢和 Monel 合金的腐蚀速率都随氯离子含量的增加而增加,并且硫离子的存在对腐蚀也有一定的促进作用。 在塔顶水相中,氯离子和硫离子均对 Monel 合金腐蚀的影响不大。
英文摘要:
      Objective To investigate the influences of contents of chloride and sulfur ions on corrosion rates of 316L stainless steel and nickel-based alloy Monel in crude oil fractions and overhead aqueous phase of crude oil unit. Methods The corrosion rates of 316L stainless steel and Monel alloy in aqueous phase and oil phase containing different concentrations of chloride ions and sulfur ions were obtained by corrosion coupon experiment. SEM ( scanning electron microscope) was used to observe the surface microstructure of corroded 316L and Monel alloys. The influence of two kinds of ions on the corrosion of 316L stainless steel and Monel alloy was discussed. Results The corrosion rates of 316L stainless steel and Monel alloy in highly acidic desalted crude oil were 0. 0091 mm / a and 0. 0248 mm / a, respectively. And in weak acidic second fraction, the corrosion rates were 0. 0078 mm / a and 0. 0031 mm / a, respectively. In second fraction, after addition of 600 mg / L of chlorine ion and 30 mg / L of sodium sulfide, the corrosion rates of 316L stainless steel and Monel alloy were 0. 1755mm / a and 0. 1707 mm / a, respectively. Meanwhile, in the desalted crude oil with the same concentrations of chloride ions and sulfide ions, the corrosion rate of 316L stainless steel was 0. 0545 mm / a and that of Monel alloy was 0. 1281 mm / a. Conclusion The results indicated that the naphthenic acid corrosion was the dominant factor when there was little chloride in oil phase and the chloride corrosion turned into the major factor if the content of chloride in oil was at high levels. The corrosion rates of the 316L stainless and Monel alloy raised with the increase of chloride ion concentration in oil phase. Furthermore, the existence of sulfur ions could accelerate corrosion in oil phase. In contrast, chloride and sulfur ions did not have apparent impact on the corrosion of Monel alloy in aqueous phase.
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