COMPLIANCE INFO_COMPLIANCE INFO 1983-2007

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MIL—C-11796B panels that are similar in surface finish (see the panels shall show more than three cor- 4.6.8.1). A specific gravity-weight method, rosion dots, none of which exceeds 1 milli- or any other suitable method, may be used meter in diameter. Corrosion in excess of for making the determination. When a spe- this amount shall be cause for rejection. cific gravity-weight method is used the test specimen shall be of a design that will pre- 4.6.8.3 Shed storage. Three test panels clude gross errors due to accumulation of shall be cleaned and polished (see 4.6.8.1), material at the bottom of the specimen. For and coated (see 4.6.8.1.1) with a film of a specific gravity-weight method the film 1.5 ± 0.2 mils. After standing for approxi- thickness may be calculated as follows: mately 16 hours the panels shall be stored in l000 X w X 0.061 a shed of the type illustrated in figures 1 and Film thickness (in mils) 2. The shed shall be exposed to the weather where, D X A in an unshaded location in the vicinity of 1 mil — 0.001 inch Rock Island Arsenal, Rock Island, Ill. At the 0.061 cu. in. s 1 cubic centimeter W — weight of film, grams end of a one year storage period, the remov- D — density of the film, grams/cc ability test (see 4.6.11) shall be conducted. A total surface area of the spec- The panels shall then be examined in the imen, square inches significant area as defined in Specification JAN—H-792. At least two of the panels shall 4.6.8.1.3 Test procedure. The panels shall be free of corrosion and the third panel shall be permitted to stand for approximately 16 have no more than three corrosion dots, none hours after dipping and then suspended by of which exceeds 1 millimeter in diameter. stainless steel or monel hooks and subjected Corrosion in excess of this amount shall be to 30 days of the humidity cabinet test de- cause for rejection. scribed in Method 5310 of Federal Standard No. 791. At the end of the 30 day test the 4.6.8.4 Outdoor storage. Three test panels panels shall be removed, decoated with shall be cleaned and polished (see 4.6.8.1), naphtha, and examined in the significant and coated with a film of 50 to 55 mils. In area of the panels as defined in Specification order to obtain a film of 50-55 mils the com- JAN—H-792. At least two of the panels shall pound should be heated to a temperature be free of corrosion and the third panel shall slightly above the melting point. The panels have no more than three corrosion dots, none are immersed and mechanically withdrawn of which exceeds 1 millimeter in diameter. at a rate sufficient to provide the desired Corrosion in excess of this amount shall be thickness. After standing for approximately cause for rejection. 16 hours the panels shall be openly exposed to the weather for one year in an unshaded 4.6.8.2 Accelerated weathering. Three test location in the vicinity of Rock Island Ar- panels shall be cleaned and polished (see senal, Rock Island, 111. The panels shall be 4.6.8.1), and coated (see 4.6.8.1.1) with a inclined 45° from the vertical, with the film of 1.5±0.2 mils. After standing for ap- coated test surface facing due south. At the proximately 16 hours the panels shall be ex- end of the one year exposure period, the posed for 300 operating hours in the acceler- removability test (see 4.6.11) shall be con- ated weathering apparatus specified in ducted. The panels shall then be examined Method 6151 of Federal Test Method Stand- in the significant area as defined in Specifi- ard No. 141. At the end of the 300 hour cation JAN—H-792. None of the panels shall exposure period, the removability test (see show more than three corrosion dots, none. 4.6.11) shall be conducted. The panels shall of which exceeds 1 millimeter in diameter. then be examined in the significant area as Corrosion in excess of this amount shall be defined in Specification JAN-11-792.None of cause for rejection. 7 i