1 Downloaded from https://www.everyspec.com MIL-STD-81OD 19 July 1983 e . Clogging of openings and filters. f. Physical interference with mating parts. Fouling of moving parts. s. Exothermal reaction (thermite effects) of clay particles (with aluminum oxide) at high temperatures, producing heat which could cause high- temperature corrosion and produce extremely hard, erosive particles. ,,, h. .. . NOTE: This test method should be applied at the end of the tailoring process described in section 4 of this standard. ‘” a-. ~.
This method is applicable to all mechanical, electrical, - electronic, electrochemical, and electromechanical devices for which exposure to the effects of a dry sand- or dust-laden atmosphere is anticipated. Ii.’~. This method does not apply to any chemical reaction that may occur in the presence of moisture. ., ,, c. ~. (See General Requirements, 4.4.) This method can PrOduce a dust coating on, or severe abrasion of, a test item, which could influence the results of other MIL-STD-81O methods such aa Fungus (method 508.2), Humidity. (507.2), and Salt Fog (509.2). Therefore, this ,method should be appliep following such tests.
Additionally, this method should follow method 501.2 , (High Temperature], since the temperature detiivedii used in this method’. ,.. d. Test vari~. The variables aaso@ated with the blowing sand and dust teat procedures include: (1) Air velocity. ! (2) Temperature. (3) Test item configuration and orientation. (4) Sand and dust oompositiori. (5) Sand and dust concentration. (6) Teat duration. . (7) Additional guidelinea as appropriate. 1-3.1 ~. Two test procedures are included in this method: Blowing Dust and Blowing Sand. Baaed on the test itemts deployment -. expoeure, and function, determine whether both procedures are applicable. ., METHOD 510.2 19 Jllly:1983 510.2-2