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因为两个同种金属物体的触点的电压降大大小于两个异种金属物体的触点电压降,因此建议将钢阴极表面覆一层铝。往钢上覆铝的最有效的方法是热渗铝,因为在这种条件下,铝向钢中扩败,同时钢表面上会覆上一层薄薄的铝。最好的操作制度是:将阴极杆接触表面机械处理到见到光泽的程度,然后将此表面用丙酮脱脂,再以氯化钾和氟化钾(1:1)的饱和水溶液浸渍。在立式电炉的坩埚中熔化工业纯铝,并加热到740℃。阴极杆用天车吊到液铝表面,保持6～7分钟,使表面上的水份充份蒸发。从液铝表面刮下氧化薄膜,将阴极杆垂入铝中,保维15～20分
Because the voltage drop across the contacts of two metals of the same type is significantly less than the contact voltage drop across two dissimilar metallic objects, it is advisable to coat the steel cathode with aluminum. The most effective way to apply aluminum to the steel is to heat aluminize because under these conditions aluminum is reduced to steel and a thin layer of aluminum is deposited on the steel surface. The best system of operation is to mechanically treat the surface of the cathode rod to the extent it is visible, degrease the surface with acetone and then impregnate with a saturated aqueous solution of potassium chloride and potassium fluoride (1: 1). Industrial pure aluminum was melted in a crucible of a vertical electric furnace and heated to 740 ° C. Cathode rod Crane hoisted to the liquid aluminum surface, to maintain 6 to 7 minutes, so that the surface of the water fully evaporated. Scrape the oxide film from the liquid aluminum surface, the cathode rod hanging into the aluminum, maintenance of 15 to 20 minutes