Na和电解质对阴极炭块的渗透

采用电解与非电解，加铝液与不加铝液的方法研究了钠和电解质的渗透机理。实验发现：在非电解情况下，不加入铝液，用酚酞测试法没有检测到渗透现象，加入铝液之后，铝和电解质溶解在一起，发生了化学反应，生成钠蒸气和氟化物，渗透到阴极炭块中。在电解情况下，渗透是由化学反应和电化学反应共同引起的，电化学反应引起的渗透深度要强于化学反应。无论电解与非电解，有铝液存在时的渗透深度都是随着电解质分子比的增加而加深。

PENETRATION OF Na AND ELECTROLYTE INTO CATHODE BLOCK

The penetration mechanism of Na and electrolyte into cathode was studied by electrolysis and nonelectrolysis,adding aluminium or without aluminium. It was discovered that there was not penetration by phenolphthalein reagent in condition of nonelectrolysis and without aluminium. But Na steam and fluoride penetrated into cathode because chemical reaction of aluminium and electrolyte was generated after adding liquid aluminium. During electrolytic process,Na and electrolyte penetrated by both chemical and electrochemical reaction and the penetration mean while electrochemical reaction was stronger than chemical reaction. With the increasing of cryolite ratio,the penetration depth increased.