鎂在水溶液中腐蝕動力程序的分析與模擬

Analysis and Simulation of Corrosion Kinetics of magnesium in aqueous solutions

張予凡(Yi-Fan Chang)

指導教授 ： 張裕祺

淡江大學/工學院/化學工程與材料工程學系碩士班/碩士(2014年)

https://doi.org/10.6846/TKU.2014.00974

摘要

本研究主要探討鎂及鎂合金金屬於水溶液環境中的電化學腐蝕行為，並且從文獻中所得極化行為之實驗結果，利用Butler-Volmer方程式及Tafel方程式模擬出本研究之適當反應機制及其極化曲線。
而從模擬結果發現，在低電位區域鎂金屬的電化學氧化產生一價鎂離子Mg+，且清楚的發現在高電位部分區域有鎂金屬的陽極氧化部分有二價鎂離子Mg2+的析出，此外，可發現在中間電位部分區域存在高低兩電位區之結果依一定比例組成模擬出本次研究結果。

關鍵字

鎂腐蝕 ； 負差效應 ； 腐蝕動力程序

並列摘要

This study focused on the electrochemical corrosion behavior of magnesium and magnesium alloy metal in an aqueous environment. Using Butler-Volmer equation and the Tafel equation to simulate the polarization curve of this study. As we found that the unipositive is involved as an early step in the electrochemical oxidation of magnesium at low potential region. And it is clear that, during the anodic oxidation of magnesium metal, the transfer simultaneously of two electrons to form at high potential. Besides ,there is a proportion combine two curves to involve the consequence at middle potential.

並列關鍵字

Magnesium ； Corrosion ； Negative difference effect

參考文獻

[1] M. Pourbaix, Atlas of Electrochemical Equilibria in Aqueous 88 Solution, NACE, Houston, TX, USA, (1974).

[2] J. H. Nordlien, S. Ono, N. Masuko, K. Nisancioglu ,A TEM investigation of naturally formed oxide films on pure magnesium, Corrosion science, 39(8), (1997), 1397.

[3] M. M. Avedesian, H. Baker (Eds.), Magnesium and Magnesium Alloys, ASM Specialty Handbook, ASM International, Materials Park, OH, USA (1999), 194.

[4] A. L. Rudd, C. B. Breslin, F. Mansfeld, The corrosion protection afforded by rare earth conversion coatings applied to magnesium, Corrosion science, 42, (2000), 275.

[5] K. Huber, Anodic formation of coatings on magnesium. Zinc, and cadmium, Journal of electrochemical society, 100(8), (1953), 376.