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作者:

Gong, Liqiang (Gong, Liqiang.) | Fu, Hanguang (Fu, Hanguang.) (学者:符寒光) | Zhi, Xiaohui (Zhi, Xiaohui.)

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EI Scopus SCIE

摘要:

Based on the Tafel formula, Butler-Volmer equation, and first-principles calculations, the bulk model, surface model, and polarization prediction curve of the Hypereutectic High Chromium Cast Iron (HHCCI) matrix were constructed. The results show that the predicted corrosion current density (2.19 x 10-5 A cm2) of the copper -bearing HHCCI matrix is lower than the measured corrosion current density of the copper-bearing HHCCI (4.41 x 10-5 A cm2) under the acidic condition of pH = 1. In the neutral environment of pH = 7, the corrosion resistance of HHCCI is better than that of HHCCI under acidic conditions. The predicted corrosion current density of the copper-bearing HHCCI matrix (4.39 x 10-10 A cm2) is also smaller than that of copper-free HHCCI (7.98 x 10-10 A cm2), which shows that the corrosion resistance of copper-containing HHCCI matrix is better than that without copper from the perspective of first-principles calculation. Combined with the electrochemical experi-mental results, it can be seen that the corrosion potential (-409.76 mV) of 1.5 wt % Cu HHCCI is significantly higher than that of 0 wt % Cu HHCCI (-450.34 mV). The trend of the electrochemical test results is consistent with the predicted trend of the calculated polarization curve, which indicates that copper alloying can improve the corrosion resistance of HHCCI.

关键词:

Corrosion resistance First -principles calculations Tafel formula Hypereutectic high chromium cast iron Butler-Volmer equation

作者机构:

  • [ 1 ] [Gong, Liqiang]Beijing Univ Technol, Res Inst Adv Mat Proc Technol, Key Lab Adv Funct Mat, Minist Educ, Beijing 100124, Peoples R China
  • [ 2 ] [Fu, Hanguang]Beijing Univ Technol, Res Inst Adv Mat Proc Technol, Key Lab Adv Funct Mat, Minist Educ, Beijing 100124, Peoples R China
  • [ 3 ] [Zhi, Xiaohui]Shijiazhuang Tiedao Univ, Sch Mech Engn, Shijiazhuang 050043, Hebei, Peoples R China
  • [ 4 ] [Fu, Hanguang]Beijing Univ Technol, Res Inst Adv Mat Proc Technol, Amt 100,Pingle Garden, Beijing 100124, Peoples R China

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来源 :

MATERIALS TODAY COMMUNICATIONS

年份: 2022

卷: 33

3 . 8

JCR@2022

3 . 8 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:66

JCR分区:2

中科院分区:4

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