Effect of rolling processing on microstructure and electrochemical properties of high active aluminu

• 作 者: 梁叔全 张勇 官迪凯 唐艳 毛志伟
• 机 构: School of Materials Science and Engineering, Central South University,
• 出 处: Transactions of Nonferrous Metals Society of China
• 发表日期: 2010年06期
• 关键词: anode rolling grains declined alkaline dislocation segregation collection coarse

The effect of rolling processing on the microstructure,electrochemical property and anti-corrosion property of Al-Mg-Sn-Bi-Ga-In alloy anode in alkaline solution(80℃,Na2SnO3+5 mol/L NaOH)was analyzed by the chronopotentiometry (E-T curves),hydrogen collection tests and modern microstructure analysis.The results show that when the rolling temperature is 370℃,the electrochemical activity of Al anode decreases gradually with the increase of pass deformation in rolling,while the anti-corrosion property is improved in the beginning and then declined rapidly.When the pass deformation of rolling is 40%,the Al anode has good electrochemical activity as good as the anti-corrosion property and with the increase of rolling temperature,both electrochemical activity and anti-corrosion property of Al anode increase first and then decrease.When the rolling temperature is 420 ℃,the aluminum alloy anode has the most negative electrode potential of about-1.521 V(vs Hg/HgO)and the lowest hydrogen evolution rate of 0.171 6 mL/(min·cm2).The optimum comprehensive performance of Al alloy anode is obtained.

The effect of rolling processing on the microstructure, electrochemical property and anti-corrosion property of Al-Mg-Sn-Bi-Ga-In alloy anode in alkaline solution (80 ℃, Na2SnO3 + 5 mol / L NaOH) was analyzed by the chronopotentiometry (ET curves), hydrogen collection tests and modern microstructure analysis. Results show that when the rolling temperature is 370 ° C, the electrochemical activity of an anode decreases gradually with the increase of pass deformation in rolling, while the anti-corrosion property is improved in the beginning and then rapidly declined. When the pass deformation of rolling is 40%, the Al anode has good electrochemical activity as good as the anti-corrosion property and with the increase of rolling temperature, both electrochemical activity and anti-corrosion property of The aluminum anode increase first and then decrease. When the rolling temperature is 420 ° C, the aluminum alloy anode has the most negative electrode potential of about-1.521 V (vs Hg / HgO) and the lowest hydrogen e volution rate of 0.171 6 mL / (min · cm2). optimum optimum performance of Al alloy anode is obtained.