Establishment of Electrode Potential-composition Plot of Al-Mg-Zn Alloys and Sacrificial Anode Protection Tests

CHEN Han-jie; GAN Zhang-hua; XU Li-ming; CHEN Yi-ming; ZHOU Huan-hua

Corrosion & Protection > 2012 > 33(9): 733-736.

CHEN Han-jie, GAN Zhang-hua, XU Li-ming, CHEN Yi-ming, ZHOU Huan-hua. Establishment of Electrode Potential-composition Plot of Al-Mg-Zn Alloys and Sacrificial Anode Protection Tests[J]. Corrosion & Protection, 2012, 33(9): 733-736.

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Establishment of Electrode Potential-composition Plot of Al-Mg-Zn Alloys and Sacrificial Anode Protection Tests

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Received Date: October 07, 2011

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A series of Al-Mg-Zn alloys were prepared by flux melting in the atmosphere. The as-prepared alloys were investigated by electrochemical performance testing and anodic protection experiment. Al-Mg-Zn electrode potential-component ternary plot was established. The results show that when x and y were equal to 0.2～0.6 and 0～0.4 respectively, the corrosion current density and free corrosion potential of alloys were very low, Ecorr was between -1.03 V and -1.25 V(vs.SCE), Jcorr was between 8.7×10-7 A/cm2 and 5.01×10-5 A/cm2. At the same time, Al0.2Mg0.2Zn0.6 and Al0.6Mg0.2Zn0.2 alloys had a good protective effect for Q235 steel in the solution of 3.5% NaCl.
- Al-Mg-Zn alloy,
- electrode potential-component plot,
- sacrificial anode,
- protective effect

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