Fu Liang *.Corrosion failure analysis on the welding line of gas compressor inlet pipeline flange[J].Plating & Finishing,2023,(6):67-72.[doi:10.3969/j.issn.1001-3849.2023.06.011]
气压机入口管线法兰焊缝腐蚀失效分析?/div>
- Title:
- Corrosion failure analysis on the welding line of gas compressor inlet pipeline flange
- Keywords:
- pipeline flange ; corrosion failure ; electrochemical corrosion
- 分类号:
- TG172.2
- 文献标志码:
- A
- 摘要:
- 对失效部位试样的化学成分、金相组织和显微硬度进行研究，通过扫描电镜、能谱分析和 X 射线衍射分析失效工件的腐蚀产物形貌和腐蚀产物组成，选用 S 2- 溶液和 S 2- 、 Cl - 混合溶液对试样进行电化学腐蚀对比实验。结果表明：气压机管线法兰焊缝腐蚀原因是法兰材质不符合标准，法兰与短接管的焊缝属于异种金属不等壁厚焊接，导致焊缝耐腐蚀性下降，在潮湿环境中与硫化物、氯化物等腐蚀介质发生综合作用，焊缝发生快速腐蚀，导致气压机管线法兰焊缝腐蚀、失效。
- Abstract:
- ： The chemical composition ， metallographic structure and microhardness of the failure parts samples were studied and the morphology and composition of corrosion products were analyzed by scanning electron microscope ， energy spectrum analysis and X-ray diffraction test. The electrochemical behavior of the samples in different electrolyte was used to carry out the electrochemical corrosion comparison test ， and the electrolyte was S 2- solution and S 2- ， Cl - mixed solution ， respectively. The results show that the reason for the corrosion of the flange weld is that the material of the flange does not meet the standard ， and the weld of the flange and short pipe is dissimilar materials and unequal wall welding ， which leads to the decrease of the corrosion resistance of the weld. Under the humid environ ment ， the comprehensive interaction of weld with sulfide ， chloride and other corrosive media ， the corrosion of weld occurs rapidly ， which resulting in the corrosion and failure of pneumatic pipeline flange.
参考文献/References:
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备注/Memo
收稿日期： 2022-02-07 修回日期： 2022-03-24 * 通信作者： 付亮（ 1983 —），男，硕士研究生，讲师， email ： 289494984@qq.com 基金项目： 2021 年度吉林省职业教育与成人教育教学改革研究课题：产教融合背景下吉林省高职院校双师型师资队伍建设研究（ 2021ZCY108 ）?/html>