《Table 1 Course of EXCO development of Al-Cu-Li alloy joint》

  提示：宽带有限、当前游客访问压缩模式

本系列图表出处文件名：随高清版一同展现

《时效处理对铝锂合金电子束焊接头耐蚀性能的影响（英文）》

1. 获取 高清版本忘记账户？点击这里登录

1. 下载图表忘记账户？点击这里登录

When electrochemical corrosion occurs in metal material，corrosion rate depends on the value of self-corrosion current（or self-corrosion current density）.Usually，the higher its self-corrosion current is，the higher the corrosion rate is，and the corrosion dimension is deeper in a unit time；thus thecorrosion in the material is more severe，and it means a low corrosion resistance.The polarization curves of Al-Cu-Li alloy weldment before and after aging treatment in3.5%Na Cl solution are shown in Fig.5.The electrochemical corrosion parameters obtained by analyses of polarization curves are given in Table 2.From Fig.5 and Table 2，it can be seen that the self-corrosion potential decreases lightly after PWHT，which demonstrates that the possibility to corrosion increases.Compared to the self-corrosion current of weldment in AW condition，the self-corrosion current of weldment increases after PWHT，which leads to the increase of corrosion rate of weldment.