用电热加压法制得的实验室铝电解槽阴极炭块试样进行了钠渗透试验，讨论了铝电解过程中钠向阴极炭块中进行渗透的机理。结果表明，钠的渗透会随着电解质分子比、电流密度的增加而增加。钠向阴极炭块中渗透有两个途径：一是通过孔隙渗透，另一个是通过晶格进行扩散 The sodium penetration test was carried out on the cathode carbon block samples of the laboratory aluminum reduction cell prepared by the electrothermal pressing method. The mechanism of sodium penetration into the cathode carbon block in the aluminum electrolysis process was discussed. The results show that the penetration of sodium increases with the increase of the molecular ratio and the current density of electrolyte. Sodium penetrates into the cathode carbon block in two ways: one is through the pores and the other is through the lattice