1、MIL-C-82660(OS) 31 January 1977 Superseding (See Section 6) - . -3 MILITARY SPECIFICATION CHROMIUM 2-ETHYL HEXOATE This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1
2、. SCOPE 1.1 Scope. This specification covers one type of chromium 2-ethyl hexoate. 2. APPLICABLE DOCUMENTS 2.1. Issues of documents. The following documents of the issue in effect on data of invitation for bids or request for proposal, form a part of this specification to the extent specified herein
3、. STANDARDS Military MIL-STD-105 Sampling Procedures and Tables for Inspection by Attributes MIL-STD-129 Marking for Shipping and Storage MIL-STD-1218 ACS Chemicals (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement function
4、s should be obtained from the procuring activity or as directed by the contracting officer.) Benefical comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commanding Officer, Naval Ordnance Station (611), Indi
5、an Head, MD 20640, by using the self-addressed Standardization Document Improve- ment Proposal (DD Form 1426) appearing at the end of this d0cumen.t or by letter. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL- C- 8 2 6 60 (OS) 2.2 Other publica
6、tions. The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on the date of the invitation for bids or the request for proposal shall apply. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM D 70-72 Specific Gra
7、vity of Semi-solid Bituminous Materials (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103) CODE OF FEDERAL REGULATIONS P 49 CFR 100-199 Transportation (The Code of Federal Regulations is ayailable from the Superint
8、endent of Documents, U.S. Government Printing Office, Washington, DC 20402. Orders should specify “49 CFR 100-199 (latest revision)“.) NATIONAL MOTOR FREIGHT TRAFFIC ASSOCIATION, INC., AGENT National Motor Freight Classification (Application for copies should be addressed to American Trucking Associ
9、ations, Attn: Tariff Order Section 1616 P Street, Washington, DC 20036.) UNIFORM CLASSIFICATION COMMITTEE, AGENT Uniform Freight Classification (Application for copies should be addressed to the Uniform Classi- fication Committee, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606. ) (Technical
10、 society and technical association specifications and standards are generally available for reference form libraries. are distributed among technical groups and using Federal agencies.) They 3. REQUIREMENTS 3.1 Material. The material shall be a dark green liquid that is essentially pure chromium 2-e
11、thyl hexoate diluted with 2-ethyl hexanoic acid. 3.2 Chemical and physical properties. The chemical and physical properties shall be in accordance with TABLE I. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reprodu
12、ction or networking permitted without license from IHS-,-,-4.3.2 Sampling. Sampling for quality conformance inspection shall be in accordance with inspection Level I of MIL-STD-105. unit shall be one unit package or container of material. shall consist of sufficient material to perform the quality c
13、onformance tests as specified in 4.4. The sample Each sample 4.4 Quality conformance inspection. Each sample obtained in accordance with 4.3.2 shall be subjected to the tests arid examination of 4.5. The acceptable quality level (AQL) shall be 2.5% defective. When specified in the contract (see 6.2)
14、, the contractor shall furnish test reports showing quantitative results for all quality conformance tests specified for each lot of material. 4.5 Tests and examinations. Unless otherwise specified herein, all chemicals shall be ACS grade in accordance with MIL-STD-1218. 4.5.1 Visual examination. Al
15、l samples shall be visually examined to verify conformance to the workmanship requirement, 45.2 Chromium content. Chromium content shall be determined in accordance with the following: a, Reagents: 1. Sulfuric acid. 2. Approximately 5 percent sulfuric acid solution. 3. Sulfuric acid diluted 1:l by v
16、olume. 4. Nitric acid. 5. 6. Sodium peroxide. 7. o-Phosphoric acid, 85% 8. Ferrous ammonium sulfate. Approximately 50% sodium hydroxide solution. 9. Standardized 0.1 normal (N) potassium dichromate, 4.9035 grams/liter (g/i) . 10. Diphenylamine sulfonate indicator, 0.2% (dissolve 0.2 g p-diphenylamin
17、e sulfonic acid sodium salt in 100 ml of water. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-82660 68 = 7777706 Ol12309L1 8 MIL-C-82660 (OS) b. Apparatus: 1. Erlenmeyer flask, 300 ml. 2. Hot plate. 3. Bunsen or Meeker burner. 4. Beaker, 60
18、0 ml. 5. Buret, 50 ml. 6. Magnetic stirrer with teflon coated stirring bar. 7. Volumetric flask, 1 liter. c. Standardization of 0.1 N ferrous ammonium sulfate: Add 39.22 g of ferrous ammonium slfate-to a one liter volumetric flask and dissolve in 5% sulfuric acid. Dilute to volume with 5% sulfuric a
19、cid. Standardize! with 0.1 N potassium dichromate solution with diphenylamine sulfonate indicator to a blue-green endpoint. d. Procedure: Weigh a 0.48 to 0.52 g sample, to the nearest O.lmg, on a small piece of filter paper. Erlenmeyer flask. nitric acid to the flask and digest on a hot plate until
20、all organic material is destroyed. Repeat dropwise addition of nitric acide until a clear green solution is obtained. Heat to slight fumes of sulfuric acid. sulfuric acid produces insoluble chromium salts.) and add 25 to 50 ml of water slowly down the side of the flask to avoid spattering. Add suffi
21、cient 50% sodium hydroxide solution to the flask until the mixture is alkaline to pH paper, Add 2 g of sodium peroxide and dilute.to 100 ml with water. remove residual sodium peroxide. a 600 ml beaker and dilute to a volume of 300 ml. Add 5 ml phosphoric acid and 50 ml 1:l sulfuric acid. Titrate wit
22、h 0.1 N ferrous ammonium sulfate to a blue green endpoint using 3 drops of diphenylamine sulfonate indicator. Add paper and sample to a 300 ml Add 5 ml concentrated sulfuric acid and 10 ml concentrated (Care must be taken in this heating as excessive fuming with Cool to 30 I 5C Boil gently to a volu
23、me of 40 ml to Cool and transfer quantitatively to e. Calculation: Chromium content, wt% = 0.01734 (A)(N) B 1 where: A = volume of standardized ferrous ammonium sulfate, ml N = normality of standardized ferrous ammonium sulfate B = weight of sample, g 0.01734 = factor to convert from ferrous ammoniu
24、m sulfate to elemental chromium E. Report the results of a minimum of 2 determinations and their average. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-2660 bB m 7977706 0123075 T m - - _. MIL- C- 82 6 60 (OS ) 4.5.3 Specific gravity. Speci
25、fic gravity, 25/25C, shall be determined in accordance with ASTM D 70-72. 4.6 Packaging inspection. The packaging, packing and marking shall be inspected to verify conformance with the requirements of Section 5. 5. PACKAGING 5.1 Packaging and packing. Unles otherwise specified in the contract (see 6
26、.2), packaging and packing shall be Level C, 5.1.1 Level C. Unless otherwise specified in the contract (see 6.2), packaging and packing of chromium 2-ethyl hexoate shall be in accordance with standard commercial practice applicable to the type of material. The packaging and packing shall be of such
27、construction and materials that the contents will be adequately protected against loss or contamination. Container size shall be as specified in the contract (see 6.2). National Motor Freight Classification or to rules of other carriers applicable to the mode of transportation. Containers shall conf
28、orm to Uniform Freight Classification, 5.2 Marking. In addition to any special marking required by the contract (see 6.2), each container shall be marked in accordance with HIL-STD-129 and Code of Federal Regulations 49 CFR 17.1-179, shall include, but not be limited to, the following information: M
29、arking a. Title, number and date of this specification b. Manufacturers name.and location c, Material trade name d. Net weight and volume e. Lot number, batch number(s), and date of manufacture f. Storage conditions g. Contract or purchase order number 6. NOTES 6.1 Intended use. Chromium 2-ethyl hex
30、oate in accordance with this specification is intended for use as an ingredient in solid propellant for the CCU-22/A impulse cartridge and other cartridge devices. 6.2 Ordering data. Procurement documents should specify the following: 6.2.1 Procurement requirements. 6 Provided by IHSNot for ResaleNo
31、 reproduction or networking permitted without license from IHS-,-,-MIL-C- 82660 (OS) a. b. d. e. f. g. h. C. Title, number and date of this specification Quantity required Place of delivery Inspection conditions when other than as specified (see 4.2) Lot size if other than as specified (see 4.3.1) P
32、ackaging requirements if other than as specified (see 5.1) Size of container required (see 5.1.1) Any special markings required (see 5.2) 6.2.2 Contract data requirements. Items of deliverable data required by this specification are cited in the following paragraph herein : Paragraph Data Requiremen
33、t Applicable DID* 4.4 Quality conformance inspection data *DIDs (Data Item Description/DD Form 1664) for the above requirements will be documented in the applicable ADL (Authorized Data List). Such data will be delivered as identified on completed (numbered) DIDs when specified on DD Forms 1423 (Con
34、tract Data Requirements Lists) and incorporated into applicable contracts. 6.3 Supersession information. MIL-C-82660 is intended to be used in lieu of AS 3059 (Code Ident 30003)dated6 December 1974 for Naval Sea Systems Command procurement. 6.4 Suggested source of supply. A product that has met the
35、requirements of this specification in past procurement actions is chromium 2-ethyl hexoate, 5.5% Cr, manufactured by Shepherd Chemical Company, 4900 Beech St., Cincinnati, OH 45212. This information is for the convenience of the procuring activity and is not to be construed as a waiver of any requir
36、ement of this specification nor as any limitation of additional potential sources of supply. Custodian: Navy - OS Preparing Activity: Navy - OS Project Number: 6810-NA34 U. S. GOVERNMENT PRINTING OFFICE: 1977-70fOn)(l927 .7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
