超级13Cr马氏体不锈钢在单质硫环境中的腐蚀行为

采用单质硫悬浮实验法,利用失重法、扫描电子显微镜(SEM)、X射线能谱(EDS)、X射线衍射(XRD)和pH计等分析手段,研究了单质硫沉积对国产超级13Cr马氏体不锈钢在模拟高温高压环境中腐蚀行为的影响,分析了腐蚀产物的表面形貌、元素组成及其含量、组分以及单质硫对高浓度NaCl溶液酸化程度的影响。结果表明:国产超级13Cr马氏体不锈钢的耐蚀性能因单质硫的添加而降低,其均匀腐蚀速率随着单质硫含量的增大而增大,并且在90℃取得最大值,但均小于0.0125mm/a;单质硫的添加改变了腐蚀产物膜的组分,硫化物的含量随单质硫含量的增大而增大;单质硫/金属界面处的pH值因单质硫与水发生歧化反应而降低,进而...

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Published in材料工程 Vol. 44; no. 3; pp. 84 - 91
Main Author 李金灵 朱世东 屈撑囤 马海霞 吕雷 王珂
Format Journal Article
LanguageChinese
Published 西北大学化工学院,西安710069%西北大学化工学院,西安,710069%陕西延长石油(集团)有限责任公司,西安,710075 2016
西安石油大学化学化工学院,西安,710065%陕西延长石油(集团)有限责任公司,西安710075
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Summary:采用单质硫悬浮实验法,利用失重法、扫描电子显微镜(SEM)、X射线能谱(EDS)、X射线衍射(XRD)和pH计等分析手段,研究了单质硫沉积对国产超级13Cr马氏体不锈钢在模拟高温高压环境中腐蚀行为的影响,分析了腐蚀产物的表面形貌、元素组成及其含量、组分以及单质硫对高浓度NaCl溶液酸化程度的影响。结果表明:国产超级13Cr马氏体不锈钢的耐蚀性能因单质硫的添加而降低,其均匀腐蚀速率随着单质硫含量的增大而增大,并且在90℃取得最大值,但均小于0.0125mm/a;单质硫的添加改变了腐蚀产物膜的组分,硫化物的含量随单质硫含量的增大而增大;单质硫/金属界面处的pH值因单质硫与水发生歧化反应而降低,进而降低了超级13Cr马氏体不锈钢的耐蚀性能,Cl-与单质硫协同作用进一步加剧其腐蚀。
Bibliography:elemental sulfur; super 13Cr martensitic stainless steel; disproportionation reaction; synergistic effect
Corrosion behavior of the domestic super 13 Cr martensitic stainless steel(00Cr13Ni5Mo2)was investigated by elemental sulfur suspension experimental method in the simulated high temperature and high pressure environment.Corrosion rate was calculated utilizing mass loss method.The micro-morphologies and chemical compositions of corrosion scales were characterized using scanning electron microscope(SEM),energy dispersive spectrometer(EDS)and X-ray diffraction(XRD),and effects of elemental sulfur on the acidification degree of NaCl solution were measured using pH meter.The results show that corrosion resistance of super 13 Cr martensitic stainless steel decreases due to the presence of elemental sulfur.Average corrosion rate increases with the increase of sulfur content,and the maximum corrosion rate is present at 90℃,while all of them are less than 0.0125mm/a;the compositions of corrosion scales change from
ISSN:1001-4381
1001-4381
DOI:10.11868/j.issn.1001-4381.2016.03.014