1、INCH-POUNDMIL-DTL-21567B (OS) 26 August 2009 SUPERSEDING MIL-C-21567A (OS) 26 October 1973 DETAIL SPECIFICATION COMPOUND, SILICONE, SOFT FILM 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 t
2、he Department of Defense. 1. SCOPE 1.1 Scope. This specification covers one grade of silicone compound with a corrosion inhibitor for application to unpainted threaded or nonthreaded mating surfaces of ferrous components between -65 degrees Fahrenheit (F) (-53.89 degrees Celsius (C) and 160 F (71.1
3、C). It is also appropriate for use as a lubricant for components fabricated from rubber (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of
4、this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether
5、or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solic
6、itation or contract. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-1916 DOD Preferred Methods for Acceptance of Product (Copies of this document are available online at http:/assist.daps.dla.mil/ or from the Standardization Documents Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094
7、.) Comments, suggestions, or questions on this document should be addressed to DEPARTMENT OF THE NAVY, Indian Head Division, NSWC, Code E11G3, Document Control, 4123 Artisans Court, Suite 103, Indian Head, MD 20640-5085 OFFICIAL BUSINESS, or emailed to amanda.pennnavy.mil. Since contact information
8、can change, you may want to verify the currency of this information using the ASSIST Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 6852 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-21567B (OS) 2 FEDERAL SPECIFICATIONS QQ-L-201
9、 Lead Sheet QQ-S-698 Steel, Sheet and Strip, Low Carbon FEDERAL STANDARDS FED-STD-791 Lubricants, Liquid Fuels and Related Products; Testing Method of (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or from the Standardization Documents Order Desk, 700 Robbi
10、ns Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents are those cited in the solicitation or contract. AMERICAN SOCIETY FOR TE
11、STING AND MATERIALS (ASTM) ASTM-B36/B36M Standard Specification for Brass Plate, Sheet, Strip and Rolled Bar ASTM B 69 Standard Specification for Rolled Zinc ASTM B 117 Standard Practice for Operating Salt Spray (Fog) Apparatus ASTM-B187/B187M Standard Specification for Copper, Bus Bar, Rod, and Sha
12、pes and General Purpose Rod, Bar, and Shapes ASTM B 209 Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate ASTM D 217 Standard Test Methods for Cone Penetration of Lubricating Grease ASTM D 942 Standard Test Method for Oxidation Stability of Lubricating Greases by the Oxygen Pres
13、sure Vessel Method ASTM D 1092 Standard Test Method for Measuring Apparent Viscosity of Lubricating Greases ASTM D 4057 Standard Practice for Manual Sampling of Petroleum and Petroleum Products ASTM D 6184 Standard Test Method for Oil Separation from Lubricating Grease (Conical Sieve Method) (Copies
14、 of these documents are available online at http:/www.astm.org or from the American Society for Testing and Materials Customer Service, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-
15、21567B (OS) 3 IPC IPC J-STD-006 Requirements for Electronic Grade Solder Alloys and Fluxed and Non-Fluxed Solid Solders for Electronic Soldering Applications (Copies of this document are available from http:/www.ipc.org/Default.aspx or from IPC, 3000 Lakeside Drive, Suite 309S, Bannockburn, IL 60015
16、-1219.) SAE INTERNATIONAL SAE AMS 4375 Sheet and Plate, Magnesium Alloy Annealed and Recrystallized 3.0AI - 1.0Zn - 0.20Mn (AZ31B-0) SAE AMS 5032 Wire, Steel 0.18 - 0.23C (SAE 1020) Annealed SAE AMS 5516 Steel, Corrosion-Resistant, Sheet, Strip, and Plate 18Cr - 9.0Ni (SAE 30302) Solution Heat Treat
17、ed (Copies of these documents are available on line at http:/www.sae.org or from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the refe
18、rences cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample (see 6.3) shall be subjected to first ar
19、ticle inspection in accordance with 4.2. A first article inspection shall be required at the discretion of the procuring activity if: a. There has been more than 12 months since production of the latest accepted lot, b. There has been a relocation of the production facility, c. There has been a majo
20、r change in personnel or procedures, or d. There has been a change in the source of supplies for the materials used in the manufacture of the silicone compound. 3.2 Materials. The materials used in the manufacture of this compound shall consist of components of a grade and quality which will formula
21、te a compound that shall conform to the requirements of this specification. 3.3 Penetration. The normal worked penetration of the compound shall be no less than 260 or more than 320 tenths of a millimeter (mm) when determined in accordance with ASTM D 217. 3.4 Oil separation and evaporation. The com
22、pound shall show no more than 4.0 percent oil separation and no more than 2.0 percent evaporation loss. 3.5 Acid number. The acid number of the compound shall be determined, and this same acid number shall be used as the reference value required in 3.7. Provided by IHSNot for ResaleNo reproduction o
23、r networking permitted without license from IHS-,-,-MIL-DTL-21567B (OS) 4 3.6 Oxidation stability. The oxygen pressure drop shall not exceed 5.0 pounds per square inch in 100 hours at 210 F (98.8 C) when determined in accordance with ASTM D 942. 3.7 Change in acid number. The acid number of the comp
24、ound after the oxidation stability test shall not exceed the value originally obtained in 3.5 by more than 5. 3.8 Apparent viscosity. The apparent viscosity of the compound at -65 F (-53.89 C) shall not exceed the maximum values shown in Table I when determined in accordance with ASTM D 1092. Table
25、I. Apparent viscosity. Rate of shear (sec-1) Apparent viscosity (poises) 25 2500 100 100500 500 3.9 Corrosive effect on metals. The compound shall produce no attack, as indicated by rusting or pitting, on aluminum alloy, copper, lead magnesium alloy, solder, steel, zinc, cadmium-plated steel, and co
26、uples of each metal with each of the others. Slight darkening, as shown by comparison with freshly polished panels of the same metals, shall be permitted. 3.10 Seawater resistance. When tested for a minimum of 48 hours, there shall be no evidence of corrosion on at least two of the three panels. Cor
27、rosion on the edges of the panels or on the surfaces within -inch from the untaped edges and 5/16-inch in from the outside edges of the edge which had been taped shall be disregarded. 3.11 Flow point. The compound shall not flow at 160 F (71.1 C). 3.12 Insolubility. The compound shall show not more
28、than 1.0 percent weight loss. 3.13 Abrasive. The compound shall show no abrasion. 3.14 Waterproof seal. The test paper from three of five tests shall show no pink coloration. Change in color within -inch of edges shall be discounted. 3.15 Volume change, rubber. After complete immersion for 168 hours
29、 at 1582 F (70-16.6 C) in the silicone compound, the volume change of elastomeric compounds, having low or medium volume swell in petroleum hydrocarbons, shall not exceed 7 percent when determined in accordance with FED-STD-791, Method 3603. 3.16 Workmanship and texture. The component materials shal
30、l be thoroughly mixed to form a product free from dirt, grit, water, or other contaminants. 3.17 Compatibility. The silicone compound shall be tested for compatibility with the explosives and propellants prescribed by the procuring agency (see 6.4). Provided by IHSNot for ResaleNo reproduction or ne
31、tworking permitted without license from IHS-,-,-MIL-DTL-21567B (OS) 5 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.2) b. Conformance inspection (see 4.3) 4.2 First article inspection. Fir
32、st article inspection shall consist of the examinations and tests specified in Table II. Failure of the first article sample to comply with the requirements of this specification shall result in the withholding of first article approval. TABLE II. Inspection requirements. Test method Inspection appl
33、icability Examination or test Requirement paragraph This specification Accommodating specification First article Conformance Material 3.2 - - X XPenetration 3.3 - ASTM D 217 X X Oil separation and evaporation 3.4 4.5.1 - X X Acid number 3.5 4.5.2 - X Oxidation stability 3.6 - ASTM D 942 X Change in
34、acid number 3.7 4.5.3 - X Apparent viscosity 3.8 - ASTM D 1092 X Corrosive effect on metals 3.9 4.5.4 - X Seawater resistance 3.10 4.5.5 - X Flow point 3.11 4.5.6 - X X Insolubility 3.12 4.5.7 Abrasive 3.13 4.5.8 Waterproof seal 3.14 4.5.9 - X Volume change, rubber 3.15 - FED-STD-791, 3603 X Workman
35、ship and texture 3.16 4.5.10 - X X Compatibility 3.17 4.5.11 Preparation for delivery Section 5 and 6.5 4.5.12 - X X 4.3 Conformance inspection. Conformance inspection shall consist of the examinations and tests specified in Table II. Failure of a sample to comply with the requirements of this speci
36、fication shall be cause for rejection of the lot represented. 4.4 Sampling. 4.4.1 First article samples. The sample shall be tested by the manufacturer or forwarded to a testing facility as directed by the procuring activity (see 6.2). The test sample shall consist of 10 pounds of silicone compound.
37、 If the sample is to be forwarded to a testing facility, the sample shall be plainly identified by securely attached, durable tags or labels with the following information: a. Sample for first article inspection, b. Compound, Silicone, Soft Film, c. Name of manufacturer, d. Product code number, e. D
38、ate of manufacture, and f. Submitted by (name) (date) for first article inspection in accordance with the requirements of MIL-DTL-21567. 4.4.2 Conformance inspection sampling. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-21567B (OS) 6 4.4.
39、2.1 Lot. For the purpose of sampling, a lot shall consist of compound taken from the same batch and offered for acceptance at one time. Each single batch shall be produced by the same manufacturing process. 4.4.2 Sampling for tests. A sample of no less than 2 pounds shall be selected from each lot p
40、rior to packaging. The sampling procedures shall be in accordance with ASTM D 4057. 4.4.2.3 Sampling for examination of filled containers. A random sample of filled containers shall be selected from each lot of compound in accordance with MIL-STD-1916, Verification Level II. 4.5 Test methods. 4.5.1
41、Oil separation and evaporation. Determine the oil separation in accordance with ASTM D 6184 with the following exceptions: a. Suspend the cone from a rod supported on the top edges of the beaker without covering the beaker. b. Maintain the oven at a temperature of 302 F (150 C). c. Ensure the sample
42、 is in the oven for 24 hours. Determine the percent evaporation by taking the loss of weight of the entire assembly after 24 hours at the test temperature, divide by the weight of the sample used, and then multiply by 100. Calculate the percent oil separation by taking the gain in weight of the beak
43、er, divide by the weight of the sample used, and then multiply by 100. 4.5.2 Acid number. Weigh approximately 10 grams (g) of grease to the nearest 0.1 g into a suitable flask, add 50 milliliters (ml) toluene, and shake until the sample is dissolved. Add 50 ml of a mixture of equal volumes of 95 per
44、cent ethyl alcohol and distilled water to which 0.5 ml of 1 percent phenolphthalein solution and sufficient standard alkali solution (0.1N KOH) has been added to give a faint pink color. Shake vigorously and heat to the boiling point of the alcohol-water layer. Titrate while hot with the standard al
45、kali solution until a pink color persists after vigorous shaking. Verify the presence of the color by allowing the flask to stand until separation into two layers occurs. Calculation: Neutralization number = VN56 W Where: V = ml of standard alkali solution used N = normality of alkali solution W = w
46、eight of grease 4.5.3 Change in acid number. Determine the acid number in accordance with 4.5.2 for the compound which has undergone the oxidation stability test. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-21567B (OS) 7 4.5.4 Corrosive e
47、ffect on metals. Completely coat clean, polished strips of metal of approximately the same size with the compound. Use metals that are aluminum alloy, copper, lead, magnesium alloy, solder, steel, zinc, or cadmium-plated steel conforming to ASTM B 209, ASTM B 187, QQ-L-201, SAE AMS 4375, IPC J-STD-0
48、06, QQ-S-698, ASTM B 69, or SAE AMS 5516, respectively, and the following couples: aluminum alloy and copper, aluminum alloy and cadmium-plated steel, magnesium alloy and steel, or brass and stainless steel. Ensure brass used conforms to requirements of ASTM B 36, and stainless steel type 302 confor
49、ms to the requirements of SAE AMS 5516 for type 302. Place the coated strips in a convection current air oven held at a temperature of 2122 F (100-16.6 C). After a period of 70 hours in the oven, remove the strips, wipe gently with a clean, lintless dry cloth, and visually inspect for evidence of corrosion. 4.5.5 Seawater resistance. Use test panels that are cold-rolled sheet steel, SAE
