| 摘要 |
FIELD: machine building.SUBSTANCE: proposed method consists in degreasing part surfaces, prior to measuring electron liberation work, by flushing them with solvent "?????? 50/170", GOST 8505-80 (State Standard) with addition of 1-2 wt % of antirust additive "????-1", GOST 15171-78. Then, the part is flushed with cold running water, wiped by clean napkin and dried for 30 minutes by dry compressed air at 10-20 kPa from cylinder or compressor. Then, it is wiped by tampon wetted in petroleum ether 70-100 Specs 6-02-1244-84 and dried in air at room temperature for, at least, 10 minutes. Then, part surface cleanliness is controlled by measuring contact potential difference by instrument furnished with measuring probe of pure nickel. Said contact potential difference for titanium alloys should equal, at least, 240 mV.EFFECT: higher reliability and validity. |
