纯钛温度计套管在含盐酸介质中使用3个月后表面产生灰黑色现象。通过外观检查、化学成分分析、力学性能测试、微观组织形貌及EDS微区成分分析等方法，探究钛温度计套管表面变色原因。结果显示，钛温度计套管外表面局部呈灰色或灰黑色可能是因为发生了吸氢腐蚀；在盐酸环境下，介质中的 F元素加速了钛基体吸氢腐蚀并使表面出现微裂纹。
Local surface of pure titanium thermowell became gray black after 3 months work in hydrochloric acid environment.The reason for this phenomenon was researched by appearance inspection, chemical composition analysis, mechanics performance testing, microstructure analysis and energy dispersive spectrometer ( EDS ) detection.The results show that hydrogen corrosion has happened in the gray and gray black area of pure titanium thermowell, while the existence of F element in hydrochloric acid accelerates the hydrogen corrosion of titanium substrate and causes surface mirco-cracks.
参考文献
| [1] | 余存烨.钛制石化设备氢脆与安全评定[J].金山油化纤,1994(1):66-71. |
| [2] | 梁伯贵,沈晓艇,刘丽,吕银祥,俞子东,杨成鑫,章燕珍.pH值与F-对纯钛及含钛镍铬合金在人工唾液中电化学腐蚀的影响[J].浙江大学学报（医学版）,2010(04):399-403. |
| [3] | 余存烨.钛腐蚀氢脆及其防止措施[J].全面腐蚀控制,2002(01):7-10. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%