20号钢在水造粒硫磺颗粒成型过程中的腐蚀特征  

Corrosion Characteristics of 20# Steel in Water Granulation Sulfur Solidification Process

作　　者：商剑峰[1] 龙德才[2,3] 田刚 罗保军[1] 刘元直[1] 肖国清[2] 

机构地区：[1]中国石化中原油田普光分公司,达州636156 [2]西南石油大学化学化工学院,成都610500 [3]油气藏地质及开发工程国家重点实验室,成都610500

出　　处：《腐蚀与防护》2013年第10期879-881,共3页Corrosion & Protection

基　　金：国家科技重大专项(2011ZX05017);国家自然科学基金(51174171)

摘　　要：采用试片悬挂转动的方法模拟水造粒硫磺成型过程，通过腐蚀失重、扫描电镜观察、能谱分析和XRD分析，研究了温度和位置因素对20号钢在水造粒硫磺颗粒成型过程中的腐蚀特征。结果表明，20号钢在水造粒硫磺颗粒成型过程中腐蚀很严重，腐蚀速率介于1．1114～5．9623mm／a之间，远远超过了含硫气田腐蚀控制标准0．075mm／a。试片表面至少形成两层腐蚀产物膜，主要为氧化铁和硫化亚铁，高温和冲刷会加快腐蚀速率。建议现场硫磺成型过程中尽量避免使用20号钢，并定期进行检测。The method of rotating the suspended metal samples was used to simulate the water granulation sulfur solidification process. Corrosion weight loss method, scanning electron microscopy, EDS and X-ray diffraction（XRD） were used to study the corrosion characteristics of 20# steel in the process which was influenced by temperature and position. The results show that 20# steel corroded severely in the process, the corrosion rate was between 1. 111 4 mm/a and 5. 962 3 mm/ a, and high temperature and erosion would accelerate the rat〈 Two layers of corrosion products were formed on the surface of 20# steel. The main components of the layers were Fe2O3 and FeS. 20# steel is not suitable for sulfur solidification process. So, to avoid using 20# steel in the process is necessary and the process should be inspected regularly.

关 键 词：20号钢 腐蚀失重 硫磺颗粒 SEMxRD 水造粒工艺 

分 类 号：TG174[金属学及工艺—金属表面处理]