不同浓度NaCl溶液下典型铝/钛合金电偶腐蚀当量折算关系

doi:10.7527/S1000-6893.2016.0204

Abstract

Abstract:

Polarization curves of 2A12 aluminum alloy and TA15 titanium alloy in NaCl solution of different concentration are measured by electrochemical tests separately. Self-corrosion current density and self-corrosion potential are obtained by the polarization curve extrapolation method, and change rules of them are analyzed. Galvanic corrosion current in different concentrations and different cathode/anode area ratios is measured. A galvanic corrosion simulation model is established, and simulation result of galvanic corrosion current is obtained. On the basis of the simulation results, equivalent relationships between the NaCl solution of different concentration and the aqueous media are calculated through an equivalent conversion coefficient method. Results indicate that galvanic corrosion occurs due to potential difference between two metals in a solution; Simulation results of galvanic current coincide well with electrochemical test results, and the simulation model can be used for simulating galvanic corrosion. Conversion coefficients of 2A12 aluminum alloy coupled with TA15 titanium alloy in the NaCl solution of different concentration and the aqueous media are obtained.

Key words: 2A12 aluminum alloy, TA15 titanium alloy, numerical simulation, galvanic corrosion, equivalent relationship

CLC Number:

TG172.2
V252

CHEN Yuelian, WANG Zhefu, BIAN Guixue, WANG Chenguang, ZHANG Yong. Equivalent conversion of galvanic corrosion of typical aluminum-titanium alloy in NaCl solution with different concentrations[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(3): 420450-420450.

References

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Equivalent conversion of galvanic corrosion of typical aluminum-titanium alloy in NaCl solution with different concentrations

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