1、 MIL-L-37bC 68 W 7777706 OLL3LL 4 MIL-L-376C 12 January 1983 SUPERSEDING MIL-L-376B 19 February 1968 MILITARY SPECIFICATION LEAD DIOXIDE, TECHNICAL This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers techn
2、ical grade lead dioxide. 1.2 Classification. Lead dioxide shall be of the following types and classes as specified (see 6.2): Type I - Low alkalinity Type II - High alkalinity Class 1 - Subsieve Class 2 - 100 mesh, nominal 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, stand
3、ards, and handbooks. Unless otherwise specified, the following specifications, standards, and handbooks of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DoDISS) specified in the solicitation form a part of this specification to the extent specifie
4、d herein. STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes : Beneficial comments (recommendations, additions, deletions) and any perti- : : nent data which may be of use in improving this document should be addressed: : to: Commander, US Army Armament Rese
5、arch and Development Command, ATTN: : DRDAR-TSC-S, Aberdeen Proving Ground, MD 21010 by using the self-addressed : : Standardization Document Improvement Proposal (DD Form 1426) appearing at : : the end of this document or by letter. FSC 6810 Licensed by Information Handling ServicesMIL-L-37bC b m 9
6、9999Ob 011312 b m MIL-L-376C 2.1.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this specification to the extent specified herein. CODE OF FEDERAL REGULATIONS (CFR) 49 CFR 171 to 179 - Department of Transp
7、ortation Hazardous Materials Regulations (The Code of Federal Regulations is available from the Superintendent of Documents, US Government Printing Office, Washington, DC 20402. Orders for the above publication should cite “49 CFR 171 to 179.“) (Copies of specifications, standards, handbooks, drawin
8、gs, and publications required by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contract- ing officer . ) 2.2 Other publications. The following documents form a part of this speci- fication to the extent specifie
9、d herein. The issues of the documents which are indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto, if applicable. UNIFORM FREIGHT CLASSIFICATION RULES (Application for copies should be addressed to the Uniform Classification Committee, Room 1106, 222
10、 South Riverside Plaza, Chicago, IL 60606.) NATIONAL MOTOR FREIGHT CLASSIFICATION RULES (Application for copies should be addressed to the American Trucking Associa- tions, Inc., Traffic Department, 1616 P Street, NW, Washington, DC 20036.) ASTM STANDARDS B214 - Sieve Analysis of Granular Metal Powd
11、ers B293 - Subsieve Analysis of Granular Metal Powders by Air Classification B329 Apparent Density of Powders of Refractory Metals and Compounds by D1193 - Reagent Water - the Scott Volumeter (Application for copies should be addressed to ASTM, 1916 Race Street, Philadelphia, PA 19103.) (Industry as
12、sociation specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal agencies.) 2 Licensed by Information Handling ServicesMIL-L-37bC 68 7797706 OLL38L3 8 I MIL-L-376C 2.3 Order of precedence. In the event of
13、a conflict between the text of this specification and the references cited herein, the text of this specifica- tion shall take precedence. 3. REQUIREMENTS 3.1 Chemical characteristics. The lead dioxide shall conform to the appli- cable chemical characteristics of table I when tested as specified the
14、rein. TABLE I. Chemical characteristics : Percent by weight : Test : : Type I : Type II : Method : Characteristic : Lead dioxide, min : 95.0 : 95.0 : 4.2.4.1 : : Water-soluble salts, max : 0.05 : 0.05 : 4.2.4.2 : : Acidity : None : None : 4.2.4.3 : : Alkalinity as Na2C03, max : 0.01 : 0.10 : 4.2.4.4
15、 : : Ammonium salts : None : None : 4.2.4.5 : 3.2 Particle size distribution. The lead dioxide shall conform to the appli- cable particle size distribution characteristics of table II when tested as specified in 4.2.4.6. TABLE II. Particle size distribution : Percent by weight : : Class 1 : Class 2
16、: Characteristic : Retained on a No. 100 sieve, max : - : 0.1 : : Retained on a No. 140 sieve, rnax : - : 10.0 : : Retained on a No. 200 sieve, max : 0.0 : - : : Retained on a No. 325 sieve, max : 5.0 : - : : Larger than 20 micrometers, max : 20.0 : - : : Smaller than 5 micrometers, max : 15.0 : - :
17、 3.3 Apparent density (class 1 only). Class 1 material shall have a minimum apparent density of 1.20 grams (g) per cubic centimeter when tested as speci- fied in 4.2.4.7. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the con- tract or purchase order
18、, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified 3 Licensed by Information Handling ServicesMIL-L-37bC b8 W 9993906 OLL38LLI T m- I MIL-L-376C in the contract or purchase order, the contractor may use his own or any
19、 other facilities suitable for the performance of the inspection requirements speci- fied herein, unless-disapproved by 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 an
20、d services conform to prescribed requirements. 4.2 Quality conformance inspection. 4.2.1 Lotting. A lot shall consist of the lead dioxide of one type and class, produced by one manufacturer, at one plant, from the same materials, and under essentially the same manufacturing conditions provided the o
21、peration is continuous. In the event the process is a batch operation, each batch shall constitute a lot (see 6.3). 4.2.2 Sampling. 4.2.2.1 For examination of packaging. Sampling shall be conducted in accord- ance with MIL-STD-105. 4.2.2.2 For test (see 6.5). Sampling shall be conducted in accordanc
22、e with table III. from each sample container and placed in a suitable clean, dry container labeled to ident.ify the lot and container from which it was taken. A representative specimen of approximately 400 g shall be removed TABLE III. Sampling for test : Number of containers in batch or lot : Numbe
23、r of sample containers : 3 to 150 3 151 to 1,200 5 1,201 to 7,000 a 7,001 to 20,000 10 Over 20,000 20 4.2.3 Inspection procedure. 4.2.3.1 For examination of packaging. The sample unit shall be one filled unit or shipping container, as applicable, ready for shipment. Sample unit and shipping containe
24、rs shall be examined for the following defects using an AQL of 2.5 percent defective: (a-) (b) Container not as specified (c) Container closure not as specified (d) Container damaged or leaking (e) Unitization not as specified (f) Marking incorrect, missing, or illegible Contents per container not a
25、s specified 4 Licensed by Information Handling Services MIL-L-37bC 68 = 9799906 0333835 3 MIL-L-376C 4.2.3.2 For test. Each sample specimen taken in 4.2.2.2 shall be tested as specified in 4.2.4. rejection of the lot represented. Failure of any test by any specimen shall be cause for 4.2.4 Tests (se
26、e 6.5). Water in accordance with ASTM D1193 and reagent grade chemicals shall be used throughout the tests. determinations shall be run and corrections applied where significant. Tests shall be conducted as follows: Where applicable, blank 4.2.4.1 Lead dioxide. Dry a portion of the specimen over sul
27、furic acid for 4 hours. (mg) to a beaker and add 15 milliliters (mL) of 1 to 1 nitric acid. pipet, 20 mL of 1 percent hydrogen peroxide. adding, if necessary, 100 mL of warm water to hasten solution. excess hydrogen peroxide with 0.1N potassium permanganate. Calculate the percent by weight lad dioxi
28、de as follows: Transfer approximately 0.5 g weighed to the nearest 0.1 milligram Add by Titrate the Stir until solution is complete, Run a blank. 11.96 N (B - A) W Percent by weight lead dioxide = where: N = Normality of potassium permanganate solution, B = Milliliters of potassium permanganate solu
29、tion required for A = Milliliters of potassium permanganate solution required for W = Weight of specimen used in grams. titration of the blank, titration of the specimen, and 4.2.4.2 Water-soluble salts. Weigh approximately 3 g of the specimen to the nearest millirrram, transfer to a beaker, add 75
30、mL of hot water, and boil for 5 minutes. Coo:, dilute to 75 mL with water and filter, discarding the first few Evaporate to dryness at 105“ to llOC, cool in a desiccator, and weigh. Calcu- late the percent by weight water-soluble salts as follows: . milliliters. Transfer 50 mL of the clear filtrate
31、to a weighed platinum dish. 150A Percent by weight water-soluble salts = - W where: A = Weight of residue in grams and W = Weight of specimen used in grams. 4.2.4.3 Acidity. Weigh approximately 10 g of the specimen and transfer to a 400-mL beaker. Add 200 mL of carbon dioxide-free water and boil for
32、 15 min- utes. Filter the mixture and wash with a small quantity of the neutral water. Test for acidity by immersing sensitive blue litmus paper in the filtrate for 3 minutes. Save the filtrate for the determination of alkalinity in 4.2.4.4. 4.2.4.4 Alkalinity. Add 3 drops of methyl orange indicator
33、 to the filtrate from 4.2.4.3 and titrate from a microburet containing 0.01N hydrochloric acid to a pink end point. Run a blank. Calculate alkalinity as follows: 5 Licensed by Information Handling ServicesMIL-L-37bC 68 77777Ob OiL3Lb 3 M I MIL-L-3 7 6C 5.3 N (A - B) W Alkalinity as Na2C03 percent by
34、 weight= where: A = Milliliters of hydrochloric acid required for titration of the B = Milliliters of hydrochloric acid required for titration of the N = Normality of the hydrochloric acid, and W = Weight of specimen used in grams. specimen, blank, 4.2.4.5 Ammonium salts. Transfer 5 g of the specime
35、n to a flask and add sufficient 20-percent sodium hydroxide solution to cover. red litmus paper with water and suspend it in the neck of the flask. solution gently for about 1 minute, taking care that no spray from the solution touches the paper. Note the color of the litmus paper. blue color indica
36、tes the presence of ammonium salts. Moisten a strip of Boil the The appearance of a 4.2.4.6 Particle size distribution. Determine the particle size distribu- tion of class 1 material in accordance with ASTM B293 and that of class 2 material in accordance with ASTM B214. 4.2.4.7 Apparent density. Det
37、ermine the apparent density of class 1 material in accordance with ASTM B329. 5. PACKAGING 5.1 Unit packing, industrial. A specified quantity of lead dioxide (see 6.2) shall be unit packed in accordance with Department of Transportation (DOT) regulations and in a manner to assure maintenance of spec
38、ified purity and integrity of the container from supply source to destination and for a minimum storage period of 6 months. 5.2 Packing, industrial. Lead dioxide, unit packed as specified in 5.1, shall be packed in accordance with DOT regulations and in a manner to assure carrier acceptance and safe
39、 delivery to the first destination. Containers shall be in compliance with Uniform Freight Classification Rules, National Motor Freight Classification Rules and the rules of any other carrier appli- cable to the mode of transportation. 5.3 Unitization. Like quantities of packs of lead dioxide shall
40、be unitized in a manner to assure carrier acceptance, protection of the contents, and integrity of the pack from supply source to first receiving activity, and to assure stability in stacking. 5.4 Marking. Containers and unitized loads shall be marked in accordance with DOT and any other applicable
41、regulations. to show the batch or lot number and date of manufacture of the lead dioxide and the following precautionary information: Each container shall be marked 6 Licensed by Information Handling ServicesMIL-L-376C HAZARDS : STRONG OXIDIZER TOXIC BY INHALATION AND INGESTION DANGER! STRONG OXIDIZ
42、ER CONTACT WITH OTHER MATERIAL MAY CAUSE FIRE WARNING! HARMFUL IF SWALLOWED OR INHALED KEEP FROM CONTACT WITH CLOTHING AND OTHER STORE IN TIGHTLY CLOSED CONTAINER REMOVE AND WASH CONTAMINATED CLOTHING PROMPTLY KEEP CONTAINER CLOSED USE ONLY WITH ADEQUATE VENTILATION WASH THOROUGHLY AFTER HANDLING KE
43、EP AWAY FROM FOOD PRODUCTS COMBUSTIBLE MATERIALS FIRST AID: If swallowed and victim is conscious, have victim drink water or milk and have victim induce vomiting by sticking finger down throat. If swallowd and victim is unconscious or having con- vulsions, do nothing except keep victim warm. Call fo
44、r immediate medical attention. If in eyes, hold eyelids open and flush with plenty of water. If inhaled, remove to fresh air. If not breathing, give artificial respiration, preferably mouth-to-mouth. If breathing is difficult, give oxygen. 6. NOTES 6.1 Intended use. Lead dioxide is intended for use
45、in pyrotechnic and primer formulations. 6.2 Ordering data. Acquisition documents should specify the following: (a) Title, number, and date of this specification (b) Type and class of material required (see 1.2) (c) Unit quantity required (see 5.1) 6.3 Batch. A batch is defined as that quantity of ma
46、terial which has been manufactured by some unit chemical process or subjected to some physical mixing operation intended to make the final product substantially uniform. 6.4 Significant places. For the purpose of determining conformance with this specification, an observed or calculated value should
47、 be rounded off “to the nearest unit“ in the last right-hand place of figures used in expressing the limiting value, in accordance with the rounding-off method of ASTM E29. 6.5 Sampling and testing precautions. This specification covers inspection of chemical material which is potentially hazardous
48、to personnel. is a strong oxidizer, toxic by inhalation and ingestion. rules, regulations and procedures must be followed in the handling and pro- cessing of this material. Lead dioxide All applicable safety 7 Licensed by Information Handling ServicesMIL-L-37bC 68 77779Ob OLL38L 7 MIL-L-376C Custodians: Army - EA Navy - AS Review activities: Preparing activity: Army - EA Project No. 6810-B347 Army - MD Navy - OS DLA - GS User activity: Army - AR 8 V.5. GOVERNMENT PRINTING OFFICE1 1983-605-034/1929 Licensed by Information Handling Services
