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胡平,于志涛.TZM合金在酸、碱腐蚀介质中的腐蚀行为研究[J].稀有金属材料与工程(英文),2017,46(12):3961~3966.[Hu Ping and Yu Zhitao.Study on Corrosion Behavior in Acid and Alkaline Medium of TZM Alloy[J].Rare Metal Materials and Engineering,2017,46(12):3961~3966.]
Study on Corrosion Behavior in Acid and Alkaline Medium of TZM Alloy
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Received:October 13, 2015  Revised:December 17, 2015
DOI:
Key words: Corrosion  Acid corrosion medium  Alkaline corrosion medium  Anode dissolve
Foundation item:西部材料科技创新(XBCL-3-21),西安市科技计划-高校院所技术转移推进项目 (CXY1521(3)), 西安建筑科技大学科技基金 (QN1505).
Author NameAffiliation
Hu Ping and Yu Zhitao  
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Abstract:
      Researched the corrosion behavior of TZM and La doped TZM alloy in acid and alkaline medium. Designed four corrosion period stages as 10days, 30days, 50days, 70days for respectively. Investigated and compared mass loss condition, weight loss condition, average corrosion rate and corrosion morphology. Anlysis the corrosion mechanism in acid and alkaline of TZM alloy and the effect of La doped on corrosion resistance of TZM alloy. The study shows TZM alloy corroded in acid major set off cell reaction and anode dissolved while cathode hydrogen evolution. Corrosion prior occurred at surface defect, impurty, grain boundary and dislocation. Crevice corrosion morphology was observed at the narrow slit which formed by scratch and width less than 0.0001 inch (0.025~0.1mm). Corrosion hardly occurred in alkaline medium. La doping could slightly rising the corrosion resistance of TZM alloy, but the improvement is not significant