1、HIL-C-21067C 80 = 999990b 1165805 OOT MI INCH-POUND MIL-C-21067C (MI) 28 August 1992 SUPERSEDING MIL-C-210 67B 28 June 1966 ITARY SPECIFICATION COATING COMPOUND, SYNTHETIC RUBBER, FOR EXPOSED STEEL SURFACES This specification is approved for use by the U.S. Army Missile Command, Department of the Ar
2、my, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers synthetic rubber coating compound used for protecting exposed steel surfaces from corrosion. 2. APPLICABLE DOCUMENTS 2.1 Government documents. Beneficial comments
3、(recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, U.S. Army Missile Command, ATTN: AMSMI-RD-SE-TD-ST, Redstone Arsenal, AL 35898-5270 by using the Standardization Document Improvement Proposal (DD Form 142
4、6) appearing at the end of this document or by letter. AMSC N/A FSC 8030 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-ZLOb7C 80 999990b 33b580b T4b MIL-C-2 1 O
5、 67C (MI ) 2.1.1 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 listed in the issue of the Department of Defense Index of
6、 Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL PPP-C-96 PPP-P-704 MIL I TARY DOD-E-699D MIL-P-116 STANDARD S FEDERAL FED-STD-601 MI LI TARY MIL-STD- 12 9 Cans, Metal, 28 Gage and Lighter Pails, Metal: Shipping, Steel, 1 Thro
7、ugh 12 Gallons Enamel, Exterior, Deck, Gray (Formula No. 20) (Metric) Preservation, Methods of Rubber: Sampling and Testing Marking for Shipment and Storage (Unless otherwise indicated, copies of the federal and military specifications, standards, and handbooks are available from the Standardization
8、 Documents Order Desk, Bldg. 4D, 700 Robbins Ave., Philadelphia, PA 19111-5094.) 2.2 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable
9、 laws and regulations unless a specific exemption has been obtained. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-21067C 80 9999906 1165807 982 9 MIL-C-21067C (MI) 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall
10、 be subjected to first article inspection (see 6.3) in accordance with 4.4. 3.2 Material. The coating material shall be a polymerized chloroprene compound dispersed in a solvent suitable for application by brush to either horizontal or vertical steel surfaces. A primer shall be used as part of the c
11、oating system to obtain the required adhesion (see 3.3). 3.3 Phvsical properties. 3.3.1 Viscosity. The viscosity of the coating compound shall be in accordance with 4.6.1 and shall be not greater than 25% of the first article viscosity value. 3.3.2 Solids. The solids content of the coating compound
12、shall be in accordance with 4.6.2 and shall be not less than 25% of the total. It also shall be not greater than 10% of that of the first .article (see 4.4). 3.3.3 Tensile strength. The tensile strength of the coating compound shall be in accordance with 4.6.3 and shall be not less than 600 pounds p
13、er square inch (psi). 3.3.4 Ultimate elongation. The ultimate elongation of the coating compound shall be in accordance with 4.6.3 and shall be not less than 250%. 3.3.5 Initial adhesion. The initial adhesion of the coating compound shall be in accordance with 4.6.4.2 and shall be not greater than 3
14、 inches when subjected to stripping for 3 minutes with a 10 pound (lb). load. 3.3.6 Adhesion after aging. The adhesion after oven aging shall be in accordance with 4.6.4.3 and shall be not greater than 3 inches when subjected to stripping for 3 minutes with an 8 lb. load. 3.3.7 Adhesion after water
15、inimersion. The adhesion after water immersion shall be in accordance with 4.6.4.4 and shall be not greater than 3 inches when subjected to stripping for 3 minutes with a 10 lb. load. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-C-2LOb7C 80
16、999990b LLbS808 819 MIL-C-21067C (MI) 3.3.8 Color. Unless otherwise specified in the contract or order (see 6.2), the coating material shall be of a gray color conforming to formulate 20 of DOD-E-699D (see 4.6.4.5). 3.4 Workmanship. The coating shall be produced in a manner to insure a product which
17、 shall be uniform, in conformance with this specification, and free of dirt, foreign material or other contaminants (see 4.7) . 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the perfo
18、rmance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved
19、 by the Government. The Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for compliance. All items shall meet all requir
20、ements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of ensuring that all
21、products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing operations, is an acceptable practice to ascertain conformance to requirements, however, this does not authorize submission of known defective m
22、aterial, either indicated or actual, nor does it commit the Government to accept defective material. 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.4). b. Quality conformance inspection (see 4.5) . 4.3 Ins
23、pection conditions. Unless otherwise specified, all inspections shall be performed in accordance with the test conditions specified in 4.6. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-C-ZLOb7C 80 999990b lLb5809 755 D Inspection MIL-C-2106
24、7C (MI) Requirement paragraph 4.4 First article inspection. When specified in the contract or order (see 6.2) a first article sample shall be subjected to first article inspection. the contract or order. First article inspection shall consist of all examinations and tests specified herein. Subsequen
25、t units shall not be considered for acceptance until Government approval of the first article sample has been obtained. The first article shall have been manufactured using the same production processes, procedures, and equipment which will be used in fulfilling the contract. The quantity shall be a
26、s specified in 4.5 Quality conformance inspection. Quality conformance inspections for acceptance of material shall consist of selected examinations and tests as shown in table I. the inspections specified herein constitutes rejection of the lot. Failure to pass any of TABLE I. Quality conformance i
27、nspection. I Vis cos i ty Solids Tensile strength Ultimate elongation Adhesion , init ia1 Color 3.3.1 3.3.2 3.3.3 3.3.4 3.3.5 3.8 Test paragraph 4.6.1 4.6.2 4.6.3 4.6.3 4.6.4.2 4.6.4.5 4.5.1 Lot. A lot shall consist of all the material submitted - for acceptance at the same time, which has been prod
28、uced by one manufacturer in one continuous operation without change in materials or processes, but shall consist of a quantity not greater than 2500 lbs. 4.5.2 Sampling. Sampling to verify conformance to section 3 requirements shall be performed in accordance with table II. Each container in a lot s
29、hall be considered as a unit of product. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-210b7C 80 = 999990b 1165810 477 = MIL-C-21067C (MI) 1 to 13 14 to 150 151 to 280 281 to 500 501 to 1200 1201 to 3200 100% 13 20 29 34 42 In all cases: Ac
30、ceptance number is ZERO Rejection number is ONE 4.6 Test procedures. 4.6.1 Viscosity. Viscosity of the coating compound shall be The test shall be run in duplicate using a new sample determined with either a Brookfield or a McMichael viscosimeter, or equivalent. of material for each determination. B
31、oth the sample of coating compound and the apparatus shall be conditioned at the testing temperature of 27 - + 5C for 4 hours before testing (see 3.3.1). 4.6.2 Solids content. 4.6.2.1 Procedure. A covered low-form weighing bottle shall be weighed, and approximately 10 grams of thoroughly mixed coati
32、ng compound shall be poured into the tared container, covered and weighed. After removing the cover, the container shall be placed in an oven at 100 + l.lC until the sample reaches constant weight. The covered container with the sample shall be cooled in a desiccator before weighing. The test shall
33、be run in duplicate (see 3.3.2). 4.6.2.2 Calculation. The percentage of total solids (see 3.3.2) shall be calculated as follows: weight of residue weight of sample Total solids, percent = x 100 4.6.3 Tensile strength and ultimate elongation. 4.6.3.1 Specimen preparation. Specimens shall be prepared
34、by casting or applying multiple coats of the material approximately 3 inches wide by 8 inches long on silicone treated paper or other 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-suit MIL-C-21067C 80 W 9999906 LLbSLL 303 W MIL-C-21067C (MI) ble
35、release material. FiAA% shall be allowed to dry at - O+ 5C for 24 + 0.25 hours, then stripped from the backing and placed in a circulating air oven at 70 + l.lC for 24 + 0.25 hours. The final thickness of the strips shall be 0.020 toO.035 inch thick. After removing the strips from the oven, conditio
36、n the specimens at least 16 hours at 27 - + 5C before testing (see 3.3.3). 4.6.3.2 Testing. Tensile strength and ultimate elongation of the strips shall be determined using methods 4111 and 4121 of FED- STD-601 and die III specimens (see 3.3.3). 4.6.4 Adhesion. 4.6.4.1 Specimen preparation. The adhe
37、sion specimens shall be prepared as follows: Clean the surfaces of nine steel panels, 3 by 6 by 0.16 inches either by grinding, wire brushing or sandblasting and then with solvent. Cut nine strips of cotton canvas, 2 by 6 inches. Apply two brush coats of the material over the steel panels (primed as
38、 necessary) and 5 to 6 inches of the canvas strips. Allow each coat to air dry 0.50 hour. Apply a third coat of the material to the steel and to the canvas and roll the two surfaces together while wet to insure good contact between the canvas and the coating applied on the panel. After drying for on
39、e hour, apply two additional coats over the assembly allowing 0.50 hour drying between coats. Allow all assembled specimens to air cure at 27 + 5C for 96 + 0.50 hours before further treatment. - - 4.6.4.2 Initial adhesion. Initial adhesion tests shall be conducted on three of the specimens prepared
40、as specified in 4.6.4.1. Just prior to testing, the specimens shall be cut through to the metal along 2 parallel lines, leaving a strip 1.00 + 0.01 inch in width running lengthwise through the center of the- specimen. The portion outside of the one-inch strip shall be removed before testing. One end
41、 of the canvas shall be separated from the metal to permit the attachment of the weight specified in 3.3.5. The steel panel shall be supported at the ends in a horizontal position. The weight shall be attached to the free end of the canvas. Amount of stripping in inches in three minutes shall be not
42、ed and the results averaged. 4.6.4.3 Adhesion after oven aging. Adhesion of three of the specimens shall be determined as specified in 4.6.4.2, after oven aging for 46 + 0.25 hours at 90 +-l.lC. to room temperature before testing adhesion (see 3.3.6) . Allow specimens to cool 7 Provided by IHSNot fo
43、r ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-C-2LOb7C 80 m 9999906 LLb58l12 24T m MIL-C-21067C (MI) 4.6.4.4 Adhesion after immersion. Three specimens shall be immersed in distilled water at 27O t 1.l0C for 46 + 0.25 hours, removed, surface dried with paper towels
44、, and then tested as specified in 4.6.4.2 (see 3.3.7). examinations and tests in DOD-E-699D (see 3.3.8). 4.6.4.5 Color. The color shall be in accordance with 4.7 Workmanship. The coating covered by this specification shall be homogeneous and free of foreign materials. shall be clean, uniformly fille
45、d, well-sealed and legibly marked (see 3.4). 4.8 Inspection of packaging. Except when commercial packaging is specified, the sampling and inspection of the preservation and interior package marking shall be in accordance with groups A and B quality conformance inspection requirements of MIL-P-116. a
46、nd storage shall be in accordance with the quality assurance provisions of the applicable container specification shown in section 5. The inspection of marking for shipment and storage shall be in accordance with MIL-STD-129. The inspection of commercial packaging shall be as specified in the contra
47、ct (see 6.2). Containers The sampling and inspection of the packing for shipment 5. PACKAGING 5.1 Preservation, packaging and packing. Unless otherwise specified in the contract or order (see 6.2), the compound or primer may be furnished in 1 quart, 1 gallon, or 5 gallon containers. The 1 quart cont
48、ainers shall conform to type V, class 2 of PPP-C-96. The 1 and 5 gallon pails shall Fonform to type II, class 1 of PPP-P-704, If gallon cans are specified, a wire handle on a formed bridge type handle shall be affixed to the top of the containers. contract or order (see 6.2). The compound or primer
49、shall be prepared for shipment in a manner that will prevent damage during shipment and storage. 5.2 Marking. In addition to any special marking required by the contract, or order (see 3.5 and 6.2) interior and exterior shipping containers shall be marked in accordance with MIL-STD-129 and shall include the month and year of manufacture and the lot number. Each container of material shall be labeled giving adequate instructions for u
