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Citation: LI Dang-Guo, FENG Yao-Rong, BAI Zhen-Quan, ZHENG Mao-Sheng. Calculation of Diffusivity of Point Defects in Passive film Formed on X80 Pipeline Steel[J]. Chinese Journal of Applied Chemistry, ;2008, 25(9): 1007-1010. shu

Calculation of Diffusivity of Point Defects in Passive film Formed on X80 Pipeline Steel

1.
a School of Material Science and Engineering, Jiaotong University, Xi'an 710049;
2.
b Tubular Goods Research Center of CNPC, Xi'an 710065

Corresponding author: FENG Yao-Rong,
Received Date: 2 October 2007
Available Online: 30 December 2007
Fund Project: 国家重点基础研究发展规划("九七三")项目(G1999065004) ("九七三")项目(G1999065004)国家自然科学基金(50231020)资助项目 (50231020)

The diffusivity of point defects in the passive film formed on X80 pipeline steel in simulated soil environment was calculated by means of capacitance measurement and point defect model(PDM).The calculated result was testified by experimental steady current density and PDM.Two calculated results all show that the order of magnitude of diffusivity is about 1×10^-17 cm²/s.
- X80 pipeline steel,
- diffusivity,
- point defect model,
- passive film,
- capacitance measurement
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