1、 9038054 O002000 452 INCH-POUND A-A-5 9299 August 14. 1998 SUPERSEDING August 29, 1986 MIL-I-2259OC COMMERCIAL ITEM DESCRIPTION IMPREGNATED WADDING, METAL POLISH The General Services Administration has authorized the use of this commercial item description, for all federal agencies. 1. SCOPE. This c
2、ommercial item description covers a metai polish impregnated wadding intended for polishing heavily oxidized aluminum surfaces. 2. CLASSIFICATION. The unit of issue for the impregnated wadding shall conform to the following weights and sizes as shown below: a. A five ounce (142 g) weight measuring t
3、hree and one half inches (8.9 cm) in both diameter and height with a dimensional tolerance of 4-0.25 and -0.0 inch (+6.35 and -0.0 mm). b. A two pound (908 g) weight measuring six inches (15.2 cm) in diameter and five inches (12.7 cm) in height with a diameter tolerance of +OS and -0 inch (+12.7 and
4、 -0.0 mm). SALIENT CHARACTERISTICS. 3.1 Composition. The composition of the impregnated wadding shall be optional with the manufacturer, but shail be restricted by the requirements specified herein. The container materials shall not interact physically or chemically so as to alter the strength of th
5、e container and purity or quality of the contents for at least one year from the date of the shipment. 3.2 Non-volatile content. The non-volatile content of the impregnated wadding shall be between 35 and 45 percent by weight, when tested as follows. A representative portion of the sample, weighing
6、approximately 10 grams (0.35 ounces), shall be accurately weighed and placed in a Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data which may improve this document should be sent to: Commander, Naval Air Warfare Center Aircraft Division, Code 414100B120-3,
7、 Highway 547, Lakehurst, NJ 08733-5100. FSC 7920 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-9018054 O002001 399 t A-A-5 9299 weighed porcelain crucible. The crucible shall be heated on a steam bath for 45 minutes and then in an oven at 220 OF k4
8、 OF (104 OC k2 OC) for 2 hours, cooled, and weighed. The percentage of non-volatile matter shail be shall be calculated as foiows: - B x 100 = % non-volatile matter A A = weight of original B = weight of sample left in crucible 3.3 Ash content. The ash content of the impregnated wadding shall be bet
9、ween 8 and 12 percent by weight, when tested as follows. The crucible containing the non-volatile matter shall be heated, using only moderate heat until all the organic matter is burned off. The crucible shall then be cooled and weighed. The percentage of ash shall be calculated as follows: - C x lO
10、O=%ash A A = weight of original (see 3.2) C = weight of residue left in sample 3.4 Toxici-. The impregnated wadding shall have no adverse effect on the health of personnel when used for its intended purpose. 3.5 Volatility. The volatility of the impregnated wadding shd be equal to or less than that
11、of distilled water when tested as follows. An amount of wadding shall be weighed into a glass evaporating dish. An equivalent weight of distilled water shall be added to a second dish. Both shall be exposed for 30 minutes in a draft free atmosphere having a temperature of 75 OF fi OF (24 OC fl OC) a
12、nd a relative humidity of 50 k 5 percent. At the end of the exposure period, the comparative loss in weights shail be observed. 3.6 Ease of removal and corrosiveness. The polished test panels of aluminum clad alloy, copper, and steel shall show no discoloration or any other evidence of corrosion whe
13、n tested as follows. The impregnated wadding shall be applied in accordance with the manufacaireis instructions to three 1 by 6 inch (2.5 by 15.2 cm), 7075 Alclad aluminum panels conforming to ASTM-BZ09. The panel shall then be placed in a horizontal position under an infrared reflector eing lamp (p
14、olished face up, and without wiping off the spent polish). The reflector apparatus shall then be adjusted so that a 260 watt drying lamp shall be 12 inches (30.5 cm) above the test panels. The temperature shall be not less han 120 OF (49 OC) at the panel level and shall be not greater than 140 OF (6
15、0 OC) during drying of the test panels. After allowing the rays of the drymg lamp to act upon the panels for 30 minutes, the lamp shall be turned off. After the panels cool to room temperature, they shall be wiped clean with 100 percent cotton flannel polishing cloth, and the ease with which the dri
16、ed film is removable shall be observed. The polished surfaces shall be observed. The polished surfaces shall be examined for corrosive attack, 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- m 9028054 0002002 225 rn A-A-5 92 99 staining, or discol
17、oration. The test shall be repeated using 1 by 6 inch (2.5 by 15.2 cm) copper panels conforming to ASTM-3 152 and steel panels conforming to SAEAMS5046. 3.7 Effect on uainted surfaces. The impregnated wadding shall not cause softening, discoloration, or dulling of aircraft lacquers and shall not cau
18、se a decrease of surface hardness greater than one pencil hardness when tested as follows. 3.7.1 Test panels. The panels shall be made fiom 0.020 inch (0.51 mm) thick 2024 aluminum alloy Alclad sheet conforming to ASTM-B209 anodized to confomi to SAE-AMS2470. The panels measuring 3 by 6 inches (7.6
19、by 15.2 cm) shall have corners and edges broken and smoothed. 3.7.2 Surface hardness loss. A brush shall have wadding attached as described in 3.9. With the pad prepared from the impregnated wadding test sample held firmly in place, the brush weighted to 3 lbs (1.3 kg) shall be passed 1 O times over
20、 the lacquered surface. At the end of this polishing phase the film shaii be allowed to dry for ten minutes. The panel shall be wiped clean with a minimum of pressure using a 1 O0 percent cotton flannel polishing cloth, and examined for discoloration and dulling. The pencil hardness effect shall be
21、determined using ASTM-F502. 3.8 Attack on acnrlic base plastics. The impregnated wadding shall not cause crazing, cracking, or other attack on acrylic-base plastics under stress when tested using ASTM-F484, type A, acylic material. 3.9 Abrasive number. The abrasive number shall be not greater than 6
22、 when the impregnated wadding is tested as follows. A weighted 1 by 6 inch (2.5 by 15.2 cm) polished aluminum panel shall be set in the recess of a polishing table. A brush shall be prepared for the test by attaching a portion of impregnated wadding to the bristles of the brush. This portion shall m
23、easure 1.5 by 3.5 by 0.25 inches (3.8 by 8.9 by 0.64 cm). With the impregnated wadding sample held firmly in place, the weighted brush (6 pounds (2.7 kg) shall then be passed 100 times over the test panel. At the end of this polishing phase, the film formed shall be air dried and removed with a piec
24、e of 100 percent cotton flannel polishing cloth, restricting the rubbing to a minimum. The weight loss of the panel in milligrams shall be taken as the abrasive number. 3.1 O Dqing time. The impregnated wadding shall produce a film, on clad aluminum alloy, which dries within 10 minutes when tested a
25、s follows. A brush shall be prepared for the test as described in 3.9. With the pad firmly in place, the weighted brush (6 pounds (2.7 kg) shall be passed 10 times over a 3 by 6 inch (7.6 by 15.2 cm) Aiclad aluminum alloy panel surface held in a horizontal position. Careful note shall be made of the
26、 time required to produce a dry film (the timing to start immediately &er the last pass made by the brush). 3.11 Polishina ability. The impregnated wadding shall produce a reflectance equal to or better than that produced by the control formula product when tested as follows. 3 Provided by IHSNot fo
27、r ResaleNo reproduction or networking permitted without license from IHS-,-,-901805L, 0002003 LbL E A-A-59299 3.1 1.1 Preparation of panels. The clad aluminum alloy panels used in testing the polishing properties shall be cut from a 0.05 1 inch (1.30 mm) thick sheet of 7075-T6 Alclad aluminum alloy
28、conforming to ASTM-B209. They shall be approximately 5 inches (12.7 cm) wide by 16 inches (40.6 cm) long with comers and edges broken and smoothed with a 0.62 inch (15.7 mm) hole drilled near each end of each panel. 3.1 1.2 Selection of panels. The reflectance of each panel shall be measured as spec
29、ified in 3.1 1.3. If the reflectance reading is greater than 60, the panel shall be tarnished as specified in 3.1 1.4 until a reflectance reading of not less than 40 nor greater than 60 is obtained. The panel shall then be used for the polishing procedure described in 3.1 1.7. 3.1 1.3 Reflectance me
30、asurements. Daytime luminous reflectance readings at 45O shall be determined using a visual or photoelectric reflectometer with CIE illuminant C. The instrument shall be standardized with a polished black glass having a refractive index of 1.52, the instrument being set so that the glass gives a ref
31、lectance reading of 15.0. Check settings on the reference standard shall be made at sufficiently brief intervals to insure accuracy of results within 2 percent. Five different portions on the surface of the test panel shall be measured in order to obtain the average reflectance reading. 3.1 1.4 Tarn
32、ishing. 3.1 1.4.1 Rearrents. The reagents shall consist of the following: a. Solution 1 - 1600 milliliters of a 5 percent by weight solution of sodium hydroxide in water. b. Solution 2 - 800 milliliters of a 1 percent by weight solution of potassium persulphate in water. 3.1 1.4.2 Procedure. Solutio
33、n 1 shall be heated to a gentle boil in a flat 18 by 12 by 2.5 inch (45.7 by 30.5 by 6.4 cm) pyrex dish. The flame shall be removed and solution 2 carefblly added with gentle stining. The test panel shall be immersed in the solution with the polished face upward. As soon as bubbles form (2 to 3 seco
34、nds maximum immersion) the panel shall be removed, rinsed with cold water, and dried. The tamished panel should then give a reflectance reading of not less than 40 nor greater than 60. 3.1 1.5 Polishing apparatus. Polishing shall be done with weighted brushes. The brushes used for the polishing oper
35、ation shall consist of metal or wooden blocks measuring 0.5 by 1.5 by 3.5 inches (1.3 by 3.8 by 8.9 cm), with brush stock of approximately staggered aifts, each tuft of 50 k 5 straight .O91 inch (2.3 mm) diameter nylon fibers extending 0.62 inch (15.7 mm) beyond the block. The two brushes together s
36、hail be weighted with a 6 pound (2.7 kg) weight. A smooth, lined, horizontal polishing table, having a recess 5 by 6 by .O5 inches (12.7 by 15.2 by O. 13 cm) to hold the panel, shall be provided. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-! A-
37、A-59299 Mineral spirits Talc OJSP) 3.11.6 Control formula product. The control product to be used for judging the performance of the manufacturers product shail be assembled in strict accordance with the fomula specified in table I. 225 .O 25.0 I TABLE I. Control formula product. Kaolin (Acid Washed
38、) Calcium Carbonate (Precipitated) Glycerin (USP) Ingredient I Composition by weight, grams 1 25.0 25.0 5.0 I Stearic Acid (USP) I 20.0 I Infusorial Earth (White Calcined) Jewelers Rouge Absorbent Cotton (Shredded) 12.5 o. 5 10.0 NOTE: The control formula product shall be prepared by combining the f
39、irst eight ingredients in a one- pint friction top can and shaking for approximately three minutes using a paint shaking apparatus. The cotton shall be added, the lid replaced? and the shaking shall be continued for approximately ten minutes. Immediately after shaking, the contents of the can shali
40、be transferred to a device in which the impregnated cotton may be subjected to pressure in order to form a circular pad measuring 0.75 inch (19 mm) in thickness and 3 inches (76 mm) in diameter after all of the excess vehicle is removed. The device shall include a perforated cup measuring 3 inches i
41、nside diameter by 3 inches in height and shall be provided with a 3 inch disk which may be lowered into the cup, piston fashion, under pressure, 3.1 1.7 Polishing procedure. The tamished panel shall be set in the recess of the polishing table. The brushes shall be prepared for the test by attaching
42、a portion of the test sample to the bristles of one brush and similarly attaching a portion of the control formula product on the remaining brush. The portions shali each measure 1.5 by 3.5 by 0.25 inches (3.8 by 8.9 by 0.63 cm). With the impregnated wadding materials held firmly in place, the brush
43、es shall then be passed 15 times over the tarnished panel. At the end of this polishing phase, the film formed shd be allowed to dry for ten minutes and the foregoing procedure shall be repeated except that pieces of 100 percent cotton flannel polishing cloth shall be attached to the bristles of the
44、 weighted brushes in place of the impregnated wadding previously used. The parallel polished areas shall be compared visually and by averaged reflectance readings. The polishing procedure shall be performed and reflectance measured on each of three panels. In cases where there may be doubt as to the
45、 performance of the materials in actual use, it shall be subjected to the practical polishing 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-W 9038054 0002005 T34 A-A-5 9299 f ? test (3.1 1.7.1) and shall show polishing properties equal or superio
46、r to the control formula product. 3.1 1.7.1 Practical polishing test. Comparable heavily oxidized unpainted aluminum aircraft surfaces shall be separately polished with the impregnated wadding sample and the control formula product. The polished areas shall be examined visually for compliance with 3
47、.1 1. 3.12 Retention of reflectance. A polished test panel shall retain not less than 95 percent of its original reflectance when tested as follows. The polished panel from 3.1 1.7 shall be allowed to stand 24 hours in a room free of corrosive vapors. The reflectance shall be calculated by the follo
48、wing formula: Percent Retention of Reflectance = Reflectance reading after aging X 100 Reflectance reading before aging 3.13 Stability. The impregnated wadding shall show no evidence or separation of solvent or powder when tested as follows. The test sample of impregnated wadding shall be shelved wi
49、th the container unopened for 72 hours. At the end of 24 hours the container shall be inverted. This procedure shall be repeated at the end of the second 24 hour period. At the end of the third 24 hour period the container shall be opened and the contents shall be transferred intact to a wide mouth glass jar with screw cap. The interior of the original container shall be examined. Evidence of solvent or powdered sediment separation shall be noted. The glass conta
