1、MIL-Z-12061B 24 March 1983 SUPERSEDING MIL-Z-12061A 29 May 1969 MILITARY SPECIFICATION ZINC CARBONATE, BASIC, 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 one technical grade of basic zinc
2、 carbonate ZnC03*xZn(OH)2Ie 2 . APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, 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
3、 Standards (DoDISS) specified in the solicitation form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL L-P-378 - Plastic Sheet and Strip, Thin Gauge, Polyolefin NN-P-71 - Pallets, Material Handling, Flood, Stringer Construction, RR-S-366 - Sieve, Test PPP-D-729 -
4、Drums, Shipping and Storage, Steel, 55-Gallon (208 Liters) 2-Way and 4-Way (Partial) MILITARY MIL-B-117 - Bags, Sleeves and Tubing - Interior .Packaging : Beneficial comments (recommendations, additions, deletions) and any perti- : : nent data which may be of use in improving this document should be
5、 addressed: : to: Commander, US Army Armament Research and Development Command, ATTN: : DRDAR-TSC-S, Aberdeen Proving Ground, ID 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 Provide
6、d by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes MIL-STD-129 - Marking for Shipment and Storage MIL-STD-147 - Palletized Unit Loads MIL-STD-1168 -_ Ammunition Lot Nu
7、mbering MIL-STD-1188 - Commercial Packaging of Supplies and Equipment (Copies of specifications, standards, handbooks, drawings, and publications required by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contrac
8、t- ing officer,) 2.2 Other publications. The following documents form a part of this speci- fication to the extent speciied herein, indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto, if applicable. The issues of the documents which are UNIFORM FREIGH
9、T CLASSIFICATION RULES (Application for copies should be addressed to the Uniform Classification Committee, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606,) NATIONAL MOTOR FREIGHT CLASSIFICATION RULES (Application for copies should be addressed to the American Trucking Associa- tions, Inc.,
10、 Traefic Department, 1616 P Street, NW, Washington, DC 20036.) ASTM STANDARDS D1193 - Reagent Water E536 - Chemical Analysis of Zinc and Zinc Alloys (Application for copies should be addressed to ASTM, 1916 Race Street, Philadelphia, PA 19103,) (Industry association specifications and standards are
11、generally available for reference from libraries. and using Federal agencies.) They are also distributed among technical groups 2.3 Order of precedence. this specification and the references cited herein, the text of this specifica- tion shall take precedence. In the event of a conflict between the
12、text of c ._ 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-Z-L20bLB 68 W 7799706 OLLb/gO 9 W L a i c MIL-Z-12061B 3. REQUIREMENTS 3.1 Appearance. Zinc carbonate, basic shall be free from hard lumps, cakes, or agglomerates when tested as speci
13、fied in 4.2.4.1. 3.2 Chemical characteristics. Zinc carbonate, basic shall conform to the chemical characteristics of table I when tested as specified therein. TABLE I, Chemical characteristics : Percent by weight : Test : Minimum : Maximum : paragraph : Characteristic : Loss on ignition : 20.0 : 28
14、.0 : 4.2.4.2 : : Assay (as Zn) : 54.0 : 64.0 : 4.2.4.3 : : Soluble alkali (as Na2CO3) : - . 0.25 : 4.2.4.4 : : Cadmium (Cd) . - . 0.10 : 4.2.4.5 : : 3.0 : 4.2.4.6 : : Water (uncombined) . - 3.3 Granulation. No less than 99 percent by weight of the zinc carbonate, basic shall pass through a No. 325 s
15、ieve when tested as specified in 4.2.4.7. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the con- tract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. Fxcept as otherwise speci
16、fied in the contract or purchase order, the contractor may use his own or any 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 sp
17、ecification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Quality conformance inspection, 4.2.1 Lotting. A lot shall consist of the zinc carbonate, basic produced by one manufacturer, at one plant, from the same materials, and und
18、er essentially the same manufacturing conditions provided the operation is continuous. In the event the process is a batch operation, each batch shall constitute a lot (see 6.3). Each lot shall be identified and controlled in accordance with MIL-STD-1168. 4.2.2 Sampling. 4.2.2.1 For examination of p
19、ackaging. Sampling shall be conducted in accord- ance with .MIL-STD-105. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ _ MIL-2-liOblB b 7777706 OllbL-lL 0 m MIL-Z-12061B 4*2.2.2 For test. Sampling shall be conducted in accordance with table 11.
20、 A representative specimen of approximately 50 grams (g) shall be removed from each sample container and placed in a suitable clean, dry container labeled to identify the lot and container from which it was taken. TABLE II. Sampling for test : Number of containers in batch or lot : Number of sample
21、containers : . 3 to 150 3 . 151 to 1,200 : 5 1,201 to 7,000 8 * 7,001 to 20,000 10 . Over 20,000 . 20 1 I . I * 4.2.3 Inspection procedure. 4.2.3.1 For examination of packaging. The sample unit shall be one filled unit container, ready for shipment. Sample unit containers shall be examined for the f
22、ollowing defects using an AQL of 2.5 percent defective: (a) (b) Container not as specified (c) (d) Container damaged or leaking (e) Unitization not as specified (f) Contents per container not as specified Container closure not as specified Marking incorrect, missing, or illegible 4.2.3.2 For test. E
23、ach 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. Water in accordance with ASTM D1193 and reagent grade chemi- cals shall be used throughout the tests. Where applicable, bl
24、ank determina- tions shall be run and corrections applied where significant. Tests shall be conducted as follows : 4.2.4.1 Appearance. Visually examine the specimen for hard lumps, cakes, and agglomerates. 4.2.4.2 Lass on ignition, See 6.5 for testing precautions. Weigh to the nearest 0.01 g approxi
25、mately 15 g of the specimen into a tared porcelain cruci- ble. Ignite in a muffle furnace at 600“ -k 10C. Cool in a desiccator and weigh to the nearest milligram. Repeat the heating procedure until a constant weight is obtained. Perform ignition tests in a laboratory hood, cator and retain for use i
26、n 4.2.4.3. Calculate the percent by weight loss on ignition as follows: Weigh the crucible and specimen to the nearest milligram (mg). Return the residue to the desic- 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-Z-320bLB 68 W 999990b 011634
27、2 2 MIL-Z-12061B 100 (A - B) W Percent loss on ignition = where: A = Weight of specimen and crucible before ignition, in grams, B = Weight of specimen and crucible after ignition, in grams, W = Weight of specimen in grams. and 4.2.4.3 Assay (as Zn). Weigh to the nearest 0.1 mg approximately 0.25 g o
28、f the residue after ignition from 4.2.4.2 into a tall, 400-milliliter (mL) beaker. Add 20 mL of water and dissolve in 15 mL of concentrated hydrochloric acid. Neutralize with concentrated monium hydroxide solution. Add 15 mL of 30-percent sulfuric acid, 10 g of ammonium chloride, and 2 drops of 1-pe
29、rcent diphenylamine or diphenylbenzidine in concentrated sulfuric acid as the indi- cator. Heat the solution to 60“ 4- 2C and titrate with 0.2N potassium ferro- cyanide which has been standardized against pure zinc until-the solution color becomes yellowish-green. At the beginning of the titration t
30、he solution will appear blue and then become increasingly darker until it suddenly turns yellowish-green. This is about 0.5 mL before the true end point is reached. On standing for a few seconds, the colar will change backto blue. Continue the titration dropwise until the yellowish-green color remai
31、ns for at least 20 seconds, (There will be a slight difference in colors if diphenylbenzidine is used as the indicator.) Calculate the percent by weight zinc as follows: AB (100 - C) W Percent zinc = where: A = Milliliters of potassium ferrocyanide solution used, B = Grams of pure zinc equivalent to
32、 1 mL of the potassium C = Percent loss on ignition calculated in 4.2.4.2, and W = Weight of specimen in grams. ferrocyanide solution, 4.2.4.4 Soluble alkali (as Na2C03). Weigh to the nearest 0.01 g approx- imately 10 g of specimen into a 400-mL beaker. to stand on a steam bath for 1 hour, stirring
33、every 10 minutes. Filter and wash. Titrate the filtrate and washings with 0.02N hydrochloric acid, using phenolphthalein as the indicator. salts (as Na2C03) as follows: - Add 200 mL.of water and allow Calculate the percent by weight soluble 5.3 AB Percent soluble salts = where: A = Milliliters of. h
34、ydrochloric acid used, B = Normality of hydrochloric acid, and W = Weight of specimen in grams. 4.2.4.5 Cadmium. Determine the percent cadmium in accordance with ASD E536. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-Z-12061B where: A = Weig
35、ht of bottle, stopper, and specimen before heating, in grams , and B = Weight of bottle, stopper, and specimen after heating, in grams, b W = Weight of specimen in grams. i 4.2.4.7 Granulation. Weigh to the nearest 0.01 g approximately 25 g of the specimen onto a No. 325 sieve conforming to RR-S-366
36、. used to facilitate the washing. water, transfer to a tared porcelain crucible, allow the residue to settle, temperature in a desiccator and weigh to the nearest milligram. percent by weight passing as follows: Wash the specimen I through the sieve with a gentle stream of water. A camels-hair brush
37、 may be Rinse the residue retained on the sieve with I I l decant the excess water, and dry in an oven at 105 to 110C. Cool to room I Calculate the 4.2.4.6 Water (uncombined). Weigh to the nearest 0.01 g approximately 5 g of the specimen into a weighing bottle. nearest milligram, between 105 and 110
38、C. to the nearest milligram. Repeat the heating procedure until a constant weight is obtained. Calculate the percent: by weight uncombined water as follows: Stopper the bottle and weigh to the Remove the stopper and heat the bottle and specimen to Replace the stopper, cool in a desiccator, and weigh
39、 100 (A - B) w Percent uncombined water = 100 (W - A) W Percent passing = where: A = Weight: of residue retained, in grams, and iJ = Weight of specimen in grams. 5. PACKAGING 5.1 Preservation, Zinc carbonate shall be preserved level A, B or indus- trial, as specified (see 6.2). 5.1.1 Level A. 5.1.1.
40、1 Unit packing. A quantity of 50 (M.25 or -0) pounds (lb) of zinc carbonate shall be unit packed level A in a removable head steel drum furnished with a bag liner. The bag liner shall conform to type I, class B, style 1 or 2 of f.lIL-B-117. The drum shall conform to requirements of Section 5, Rule 4
41、0 of the Uniform Freight Classification (UFC), but shall be cleaned and coated as specified for the druus of PPP-D-729. The bag liner shall be closed by heat sealing, tying or knotting. using a locknut, lock-wacher, or crimped lugs. The drum shall be closed by bolted locking ring, 6 Provided by IHSN
42、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-Z- 1 206 1 B 5.1.2 Level B. A quantity of 50 (+0.25 or -0) lb of zinc carbonate shall be The bag shall conform to Section unit packed level B in a multiwall paper bag. 10, Rule 40 of the UFC and shall be a wet-stre
43、ngth plain paper Kraft shipping bag having a mnimum 0.001-inch thick polyethylene film inner wall. The film shall conform to type I or II, class, grade, and finish optional of L-P-378. The bag shall be closed to prevent leakage of contents in transit and storage. 5.1.3 Industrial. A quantity of 50 (
44、+0.25 or -0) lb of zinc carbonate shall be unit packed in accordance with-MIL-STD-1188. 5.2 Packing. Zinc carbonate, unit packed level A, B, or industrially as specified in 5.1, shall require no further protection for shipment other than unitization. 5.3 Unitization. Packs of zinc carbonate protecte
45、d level A or B shall be Drums shall be palletized as re- palletized in accordance with MIL-STD-147. quired for load type III or IV, as applicable. accordance with requirements for load type XV, using a fiberboard cap, storage aid 4 above the top tier of bags but beneath the straps. conform to type I
46、V, softwood of NN-P-71. Industrial packs of zinc carbonate shall be unitized in a manner to assure conformity with UFC and National Motor Freight Classification Rules, and acceptance by common carrier. Bags shall be palletized in The pallet shall 5.4 Marking. Level A and B containers and pallet load
47、s shall be marked in accordance with MIL-STD-129. Industrial containers and unitized loads shall be marked in accordance with MIL-STD-1188. Each container shall be marked to show date of manufacture and lot or batch number of the zinc carbonate. 6. NOTES 6.1 Intended use. Zinc carbonate, basic is in
48、tended for use in the manu- facture of smoke mixtures. 6.2 Ordering data. Acquisition documents should specify the title, number, and date of this specification, and the level of preservation required (see 5.1). 6.3 Batch. A batch is defined as that quantity of material which has been manufactured b
49、y 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 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. 7 P
