Apparent and true corrosion polarization diagrams of alloys under activation polarization control
-
摘要: 提出了描述合金的腐蝕動力學存在兩種腐蝕極化圖:(1)合金的表觀腐蝕極化圖——以電極電位相對單位合金面積上的陽極電流和陰極電流為坐標系;(2)合金的真實腐蝕極化圖——以電極電位相對合金中各相的真實陽極電流密度和陰極電流密度為坐標系.研究了在活化極化控制下,陰陽極面積比對合金腐蝕動力學的影響,獲得了在兩種坐標系中合金腐蝕動力學的定量關系式,由此建立了表觀腐蝕極化圖與真實腐蝕極化圖之間的關系.將表觀和真實腐蝕極化圖兩者結合起來,既可以直觀地表示出合金的腐蝕速率,又可以清楚地分析控制腐蝕電池過程的機理.Abstract: Two kinds of corrosion polarization diagrams were used to describe the corrosion kinetics of alloys. They have different coordinate systems. One is the coordinate system where the coordinates are the potential and the current on the unit area of alloy surface, the other is the coordinate system where the coordinates are the potential and the true anodic and cathodic current density. The former is called the apparent corrosion polarization diagram of alloys, and the latter is called the true corrosion polarization diagram of alloys. The effect of cathode-to-anode area ratio on the corrosion kinetics of an alloy was studied under activation polarization control. Combining the apparent with true polarization diagram, not only the corrosion rate of the alloy can be expressed directly, but also the mechanism of the corrosion cell can be analyzed clearly.
-
點擊查看大圖
計量
- 文章訪問數: 327
- HTML全文瀏覽量: 99
- PDF下載量: 7
- 被引次數: 0
下載:
