1、e MIL-S-50005A 68 W 7777706 0323334 8 HIL-S -50005A(MU) 31 January 1969 SVPERSEDLNG MIL-S -50005 (Om) 21 November 1958 MILITARY SPECIFICATION STAlWIC OXLDE, TECXiCAL 1. SCOPE 1.1 m. This specification covrr stannic oxide (tin dioxide) for use in the manufacture of propellants. 1.2 Claesificatioa. St
2、annic oxide rhall be of the following classes, a8 specified. (Set 6.1). Claso 1 (see t8blc I) Claes 2 (Bet table I) 2. APPLICABLE DOCUPIENTS 2.1 The following documente of the issue in efftct on date of invitation for bids or requeot for proposal, form a part of this cpccificction to the extent spec
3、ified herein. SPECIFICATIONS FEDERAL RR-S-366 - Sieve, Teet PPP-D-723 - Drums, Fiber STANDARD HILITARY HIL-STD-129 - Ratking for Shipment and Storage PSC 6810 1 THIS DOCUMENT CONTAINS L PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-S-50
4、005A 68 M 777770b OL2L3L5 T (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer .) 2.2 Other DubliCatiOnS. The following docum
5、ent forme a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. AMERCAN SOCIETP FOB TESTLNG AND MEALS ASM D1193-66 - Specification for Reagent Water (Application for copier shou
6、ld be addreseed to the American Society for Testing and Materials , 1916 Race Street, Philadelphia, Pennsylvania 19103), 3.1 paterial. Stamic oxide ehe11 be a fine white crystalline powder of purity and granulation specified herein. 3.2 Volatile content. The volutile content of stannic oxide shall n
7、ot be more than 0.50 percent when tested as rpecified in 4.4.2. 3.3 Aseav. Stannic oxide on a dry basis shal.1 be minimum 98.2 percent pure when tested as specified in 4.4.3, 3.4 Grmnulation. men terttd as specified in 4.4.4, the stannic oxide shall conform to the granulation requircaentr specified
8、in table I. Table I. Granulation requirements Sieve number Class 1 Class 2 Thru No. 200 sieve 95 95 Thru No. 325 sieve 85 90 percent by weight, mia, vercent bv weight. min, 3b5 Acidity. When tested as indicated in 4.6.5, the limit of acidity shall be not more than .O1 percent calculated as sulfuric
9、acid. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-SOOOSA 68 = 777970b 012L3Lb L MIL -S -5 00058 (MU) 4. QUALITY ASSURANCE PRDVISIONS 4.1 Resoonsibilitv for inspection. Unless otherwise specified in the Except as otherwise contract or purc
10、hase order, the supplier is responsible for the performance of all inspection requirements as specified herein. specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by
11、 the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Size of lot. 4.2.1 At vlace of map. ufacture. For the purpose of sam
12、pling, a lot of A batch is defined stannic oxide shall consist of manufacturers batch. as that quantity of material which has been manufactured by some unit chemical process and subjected to some physical mixing operation intended to make the final product substantially uniform. be identified by bat
13、ch, a lot shall consist of not more than 50,000 pounds of stannic oxide offered for delivery at one time. If the material cannot 4.2.2 At olac e of ci clivcrv. For the purpose of sampling, a lot of otannic oxide shall consist of all the otannic oxide in a single shipment. 4.3 Sanrol- . A composite s
14、ample of not less than a 1/4 pound repre- sentative specimen shall be removed from each of five containers taken at random from each lot. The rpecimen shall be placed in a clean, dry container, thoroughly blended, and labeled to identify the container and lot represented. 4.4 Test methods. 4.4.1 Gen
15、eral. Distilled water, in accordance with ASTM D1193, and analytical grade reagents shall be used throughout the tests. Blank determinations shall be run in parallel with the tests, using the same quantities of reagents used in the tests, and corrections shall be applied .when necessary. 4.4.2 Volat
16、ile content. A sample of 10 grams shall be heated at 210 k SOC for 3 hours. Calculate as follows: Percent of volatile = LOSS of wt x 100 Wt. of sample Retain the dried specimen for procedures in 4.6.3. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-
17、,-MIL -S -5 000% (MU) 4.4.3 Assav. Transfer 2.0000 grams of the dried sample to a nickel crucible of 45 to SO ml. capacity. mix with a platinum vire. Add 10 grams of sodium peroxide and again mix vith a platinum wire. Heet gently over a Meker burner until the mixture melts, then gradually raise the
18、temperature to the full heat of the burner. Swirl frequently. Cool end dissolve the melt in 100 rnl. of water contained in a 400 nil. beaker. Remove the crucible with a stirring rod and rinse with hot 5 percent hydrochloric acid. chloric acid slwly with constant stirring. Erlenmeyer flask and edd 10
19、 to 15 grams of strip nickel. flask with a tan head (a rubber stopper containing a bent glass tube extending on the outside to the bottom of the flask). 70 minutes. 70 minutes. Insert the end of the glass tube into a 250 ml. beaker containing 200 pal. of sodium bicarbonate solution (10 percent). th
20、flask from the hot plate and cool to sbout 10C. Add 3 grams of sodium carbonate and Add 100 ml. of concentrated hydro- Transfer to a 500 ml. Close the Boil gently for Add another 10 granis of nickel and boil gently for another Remove Weigh 0.9000 gram of potaositrp iodate into a 100 ml. beaker and a
21、dd 0.3 gram of sodium bicarbomte and 50 ml. of boiled water at 60. to 7OoC. Break up the crystals with a stirring rod and stir until completely dissolved. Cool in an ice bath. Remove the stopper from the flask containing the sample and iamediately add the potassium iodate-sodium bicarbonate solution
22、 while swirling constantly to prevent free iodine from coming in contact vith the nickel. Add a few marble chips, 5 ml. of starch solution (1 percent), and titrate immediately to a blue end point with a solution of potassium iodate contaiping 3.0000 grams of potassium iodate per liter. Run a standar
23、d as follow: Tramfer a.5735 gruas of pure tin (equivalent to 2.0000 grams of stannic oxide) to a 500 mi. Erlenmeyer flask. of concentrated hydrochloric acid and let stand at room temperature to dissolve. sodium peroxide in a nickel crucible. 150 ml. of water and 50 ml. of concentratcd hydrochloric a
24、cid. Add the resultant solution to Erlenmeyer flask containing the tin and carry the sample through the procedure. Add 50 ml Fuee a mixture of 3 grams of sodiu carbonate end 10 grsras of Cool, and dissolve the melt in Calculate percent stannic oxide as follows: 4 I- Provided by IHSNot for ResaleNo r
25、eproduction or networking permitted without license from IHS-,-,-MIL-S-50005A 68 M 7797706 OLZL3LB 5 M MU -S -50005A (MU) Grams of KI03 required for titra- Grams of KI03 required for the titration of pure Snz Percent of stannic oxide = tion of 2 nrams of the samole x 100 or 0.9000 + 3J Percent of st
26、annic oxide - 2 x 100 0.90 i- 3v7 A 1000 where: Vi = volume of potassium iodate solution (3 grams per liter) V2 = volume of potassium iodate solution (3 grame per liter) used in titration of the saraple. used in titration of the standard 4.4.4 Granulation. Weigh 10 grams of the sample into 8 250 nil
27、. beaker and add 15 ml. of 95 percent ethyl alcohol while stirring. Add 100 m1. of water and wash into a No. 200 sieve. stream of water while brushing gently with a camel-hair brush. sieve at 105C for 1 hour, and carefully brush the particles into a tared watch glass. Repeat the procedure using a No
28、. 325 aleve. Wash through the sieve with a slow Dry the Weigh, and subtract to obtain the weight of the residue. U-P) x 10Q U Percent of stannic .oxide passing through nieve = ( where: W = weight of sample. P = weight of residue retained by sieve 4.4.5 Aciditv. Transfer a 10 gram portion of the samp
29、le to a 250 ml. beaker, add 100 ml. of neutral distilled water and boil for 2 minutes. Cool, filter and titrate with 0.01 N sodium hydroxide solution using methyl red indtcator. Percent sulfuric acid = 4D W where: N =-normality of sodium hydroxide solution V = volume of sodium hydroxide solution W =
30、 weight of sample . 4.4.6 PackinR and marking. It shall be secertenmd that the pncking ark marking conform to the requirements of sectLon 5 of ttir apcclficntlon. 5 03n Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL -S -5 0005A (MU) 4.4.7 Relect
31、ioq. The lot shall be rejected if the sample fails to comply with any of the requirement8 specified, whether tested by the contractor or check tested by the Goverment. 5. PWUTION FOR DELIVERY 5.1 Packeninn and oackigg. 5.1.1 Level C. Unlet18 otherwise specified, the etamic oxide ahall be packed in 4
32、00 pound fiber drum8 conforming to PPP-D-723. 5.2 Hsrkiqg. In addition to any special marking required by the contract or order, marking for identification and ehipent shall be in accordance with MIL-STD-129 e 6. NOTES 6.1 Intended use. Stannic oxide ir intended for use as en anti-fouling agent. 6.2
33、 Ordering data. Procuraiacnt docuprents should specify the following: (a) (b) Clam required (ree 1.2). (c) Title, number and date of this specification. Packaging and packing (ace 5.1). Cur tod ian : Aq-MTJ Review activities: Army - MU, M) Preparing activity: Amy - rm Project No . 6810-A848 User activities: Ammy -HI 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
