1、DOD-P-24555 80 W 9997906 0474458 T 16 March 1977 MILITARY SPECIFICATION PAINT, ALUMINUM, HEAT-RESISTING (65OoC), LOW-EMISSIVITY (0.40 OR LESS) CMETRIC) This specification is approved for use by the Naval Sea Systems Command and is avail- able for use by all Departments and Agencies of the Department
2、 of Defense. Le SCOPE 1.1 SCO e. This specification covers two compositions of aluminum pigmented, heat- resistant, + ow-emissivity paint that will withstand solvents, normal weather exposure, and temperatures up to 650 Celsius (C), and will maintain an emissivity factor below 0.40. be of the follow
3、ing compositions, as specified (see 6.2): Composition G - General use. Composition L - Limited use (see 6.4). 1.2 Classification. Heat-resisting aluminum paint covered by this specification shall 2. APPLICABLE DOCUMENTS 2.1 Issues of documents. The following documents, of the issue in effect on date
4、 of invitationforids or request for proposal, form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL TT-P-320 - Pigment, Aluminum; Powder and Paste for Paint. TT-S-735 - Standard Test Fluids: Hydrocarbon. TT-T-306 - Thinner, Synthetic Resin, Enamel. PPP-P-1892 - Pai
5、nt, Varnish, Lacquer, and Related Materials; Packaging, Packing, and Marking of, STANDARDS FEDERAL FED-STD-141 - Paint. Varnish. Lacauer. and Related Materials: Methods of Inspection, Sampling, and Testing. Chemicals and Materials. FED-STD-313 - Symbols for Packages and Containers for Hazardous Indu
6、strial (Copies of specifications, standards, drawings, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2.2 Other publications. The following documents form a part of
7、this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document sho
8、uld be addressed to: Commander, Naval Ship Engineering Center, SEC 6124, Department of the Navy, Washington, DC 20362 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. (7 7 FSC 8010 : .- Provided by IHSNot for
9、 ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-P-24555 BO 999990b 0474459 L DOD-P-24555 (SH) A 569-72 - Steel, Carbon (0.15 maximum, Percent), Hot-Rolled Sheet and Str e D 93-73 - Flash Point by Pensky-Martens Closed Tester. D 562-55 - Consistency of Paints Using the
10、 Stoxmer Viscosimeter. D 610-68 - Rusting on Painted Steel Surfaces, Evaluating Degree of. D 1014-66 - Exterior Exposure Tests of Paints on Steel, Conducting. D 1308-57 - Effect of Household Chemicals on Clear and Pigmented Organic D 2369-73 - Volatile Content of Paints. . D 2698-73 - Pigment Conten
11、t of Solvent-Type Paints by High Speed Centrifuging. (Application for copies should be addressed to the American Society for Testing and (Technical society and technical association specifications and standards are generally AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) Commercial Quality. Finis
12、hes. Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103.) available for reference from libraries. They are also distributed among technical groups and using Federal agencies.) 3. REQUIREMENTS 3.1 Material. The paint furnished under this specification shall consist of ingre- dients conform
13、ing to the quantitative requirements specified in table I when tested in accordance with 4.3. TABLE I. Quantitative requirements. Characteristics Total solids, percent by weight of paint Pigment, percent by weight of paint Vehicle solids, percent by weight of paint Silica, (Sioz), percent by weight
14、of vehicle solids Consistency (package) Krebs Stormer shearing rate 200 RPM, grams Equivalent Krebs Units (KU) Drying time, hours: Set to touch, air dry Dry hard, air dry Full hardness, baked at 204OC Emissivity Flash point, OC Reauirements I Minimum 40 23 13 11 75 54 Maximum I I 3.2 Composition. 3.
15、2.1 Pigment. The pigment shall be aluminum conforming to type I or type II, class A 3.2.2 Vehicle. The vehicle shall be a silicone or modified silicone resin together Of TT-P-320. with driers, if necessary, and volatile aromatic or aliphatic-type solvents to meet the requirements of this specificati
16、on. form to the following requirements when tested as specified in 4.3.4 (see 6.4). 3.2.2.1 Solvent (composition L only). The solvent portion of compsition L shall con- (a) Aromatic compounds with eight or more carbon atoms except ethyl benzene: 8 (b) Ethyl benzene and toluene: 20 percent maximum. (
17、c) Solvents with an olefinic or cyclo-olefinic type of unsaturation: negative (d) Ketones : negative. (e) Total of (a) + (b): 20 percent maximum. percent maximum. test . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-P-2 4 555 (SH) est. 3 Qualit
18、ative requirements. The paint shall meet the following qualitative require- 3.3.1 Condition and after 24 hours air drying, the portion of the paint which was immersed shall show no more than a slight whitening or dulling in comparison to the portion that was not immersed. 3.3.8 Hydrocarbon fluid res
19、istance. A film of the paint prepared and tested as speci- fied in 4.3.13 shall show no wrinkling or blistering immediately after removal from the fluid. Ater 24 hours air drying, the portion of the panel which was immersed shall show no discernible difference with regard to hardness and adhesion fr
20、om a panel prepared at the same time but not immersed. 3.3.9 Weather resistance A film of paint prepared and tested as specified in 4.3.14 shall show no checking, cracking, or film deterioration. Dulling or staining unaccompanied by red rusting shall be permitted. On removal of the paint from the pa
21、nels the surface of the steel shall show deterioration no greater than grade 8 of ACTM D 610-68. 3.3.10 Toxicity. The paint shall contain no benzene (benzol), methanol, chlorinated On compounds. hydrolyzable chlorine derivatives, or other ingredients which are deemed toxicologically hazardous under
22、normal conditions of usage. shall exhibit emissivity characteristics not exceeding 0.4 wher. determined in accordance with 4.3.16. 3.3.11 Emissivit . Test panels prepared, painted, and tested as specified in 4.3.10.1 3.3.12 Flash point. The material shall have a minimum flash point of 38OC when test
23、ed in accordance with 4.3.17. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BOD-P-Zq555 80 m 9Ob 047q4bl1 T m DOD-P-24555 (SHI e 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract, the co
24、ntractor is responsible for the performance of all inspection requirements as specified herein. any other facilities suitable for the performance of the inspectionrequirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections
25、set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Quality conformance testing of individual lots shall consist of all the tests-of43-wlth the exception of storage stability (see 4.3.7) and weather resistance
26、 (see 4.3.14). Except as otherwise specified in the contract, the contractor may use Hic own or 4.2 Puality conformance ins ection. 4.2.1 Sam lin and inspection. method 1031 ddTR41. Sampling and inspection shall be in accordance with 4.3 procedures. 4.3.1 Test conditions. The routine and referee tes
27、ting conditions shall be in accord- ance with section 7 of FED-STD-141 except as otherwise specified herein. ness shall be measured after the coated panel has been baked at 204OC plus 2OC or 15 minutes. The dry film thick- 4.3.2 The tests listed in table II shall be conducted in accordance with FED-
28、STD-141 or as required by this specification. TABLE II. Tests. I tem Total solids Pigment content Isolation of vehicle Vehicle solids Silica Consistency Di-ying time: Set to touch Dry hard Full hardness Condition in container Storage stability: Partially full container Full container Brushing proper
29、ties Spraying properties Heat resistance: Hot rolled steel Cold rolled steel Salt spray resistance: Hot rolled steel Cold rolled steel Water resistance Hydrocarbon fluid resistance Weather resistance Benzene Methanol Chlorinated solvents Emissivity Flash point (OC) 4pplicable Method of ?ED-STD-141 -
30、I 4061 4061 3011 3021 3022 4321 4331 - - - 6061 6061 5091 5133 5132 - Test method ASTM No. D 2369-73 D 2698-73 D 2698-73 D 2698-73 D 562-55 D 1308-57 D 1308-57 D 1014-66 Sec. 5D Sec. 5D D 93-73 Test Paragraph - - - - 4.3.3 - 4.3.5.1 4.3.5.1 4.3.5.2 4.3.6 4.3.7.1 4.3.7.2 4.3.8 4.3.9 4.3.10.1 4.3.10.2
31、 4.3.11.1 4.3.11.2 4.3.12 4.3.13 4.3.14 4.3.15 4.3.15 4.3.15 4.3.16 4.3.17 Requirements Table I Table I - Table I Table I Table I Table I Table I Table I 3.3.1 3.3.2.1 3.3.2.2 3.3.3 3.3.4 3.3.5 3.3.5 3.3.6 3.3.6 3.3.7 3.3.8 3.3.9 3.3.10 3.3.10 3.3.10 3.3.11 3.3.12 c . 4 Provided by IHSNot for Resale
32、No reproduction or networking permitted without license from IHS-,-,-DOD-P-24555 0 m 9999906 0474462 L m DOD-P-24555 (SH) 4.3.3 Silica content vehicle. From a stoppered bottle or weighing pipet, weigh c rately by difference, about 3 grams of vehicle into a previously ignited and weighed 7.6 centimet
33、ers (cm) porcelain evaporating dish. Dry at 105C, in an oven for 3 hours. Place the dried sample in a cold muffle furnace and gradually increase the temperature, over a period of 3 hours to 900C, then maintain this temperature for an additional hour. After cooling in a dessicator, weigh the dish and
34、 contents and calculate the percent of silica as follows: Percent silica= Weight of ash X 100 Weight of sample X non-volatile vehicle frac tion 4.3.4 Solvent analysis foir composition L. 4.3.4.1 Se aration of volatile ortion. Pour about 15 grams of the enamel into a 50 milliliter (mi) distillingflas
35、k. stones or Berl saddles. Fit a release valve into the mouth of the flask and attach a de- livery tube to the side arm, extending into a receiver. The receiver consists of a test tube (20 by 150 mm) with side arm for attaching to a vacuum pump. The glass delivery tube should reach 38 mm from the bo
36、ttom of the tube. Immerse the receiver in a dry ice-acetone bath. Preheat a silicone oil bath to 180OC. Raise the oil bath until the oil reaches the sample level. Reduce the pressure slowly to 10 mm of mercury. After all solvent has distill- ed, carefully release the vacuum using the valve that is c
37、onnected to the distilling flask. Reserve the collected distillate for the aromatic solvent determination and the test for ketone, olefinic and cyclo-olefinic compounds. Add 10 ml of tricresyl phosphate and several anti-bumping 4.3.4.2 Determination e aromatic hydrocarbons. Apparatus: A gas chromato
38、graph equipped with a thermal conductivity detector. Column preparation: Two lengths of 6.4 mm copper tubing, 1.83 meter (m) and 5.51 m long, are packed with 35 percent N, N-Bis(2-cyanoethyl) formamide on 60- to 80- mesh Chromosorb P. 1.83 m Operating conditions: 5.51 m Detector cell temperature, OC
39、 300 300 Detector cell curkent, ma. 150 150 Injection port temperature,“C 300 300 Column temperature, OC 12 5 70 Helium flow at exit, cc/minute 175 110 4.3.4.2.1 Aromatic oxygenated solvents - procedure A. Install the 1.83 m column and follow the operating conditions described above. Inject about 3X
40、 liter of the isolated distillate and scan the chromatogram. The aliphatic solvents will emerge within 1 minute and the complete chromatogram should develop in about 5 minutes. From the position of the peaks observed on the chromatogram, select an internal standard that will be free of interference,
41、 such as cyclopentanol or cyclohexanol. Add 0.6 ml of internal standard to 3 ml of the distillate, analyze according to the above procedure. minute are aromatic solvents along with any oxygenated solvents that may be present. Calculate the percent of aromatic and oxygenated solvents as follows: Peak
42、s emerging after 1 Percent aromatic and oxygenated solvents, v/v = 20L XA 2 1.02- XB where, A = area of aromatic and oxygenated solvents B = area of internal standard Lis percent of internal standard added 2is correction factor if cyclopentanol is used. If another internal standard is used, calibrat
43、e to determine the correction factor NOTE: If the above determination exceeds 8 percent, continue with the following procedure : Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-P-24555 0 m 9999906 0474463 3 m DOD-P-24555 (SH) 4.3.4.2.2 Total arom
44、atic content - procedure 8. Place 5 ml of the distillate in a 10 ml glass stoppered graduate. graduate is being cooled with tap water. Add 5 ml of 85 percent sulfuric acid slowly while the After the acid has been added, shake vigorously for 2 minutes then allow the layers to separate. Remove as much
45、 of the top layer as possible and wash with distilled water. Carefully pipet 3 ml of the washed solvent into a small flask followed by 0.6 ml of the internal standard. Mix and analyze according to procecure A. Calculate the percent of aromatics after acid treatment in the same manner as in procedure
46、 A and the percent of total aromatic solvents as follows: Percent total aromatic solvents, v/v = v x (OD-A) 100-B where, A = percent of aromatic and oxygenated solvents from procedure A B = percent of aromatic solvents after acid treatment. NOTE: If the total aromatic content of the solvent is betwe
47、en 8 percent and 20 4.3.4.2.3 Toluene and eth lbenzene - rocedure c. Install the 5.51 m column and follow Add 0.3 ml of high purity benzene to the If the results of procedures A and B indicated the presence percent, continue with the following procedure: the operating conditions-descriEed for thatco
48、lumn. 3 ml sample used in procedure A. of oxygenated solvents, treat this sample with 85 percent sulfuric acid (use 3 ml acid) as described in procedure B. Inject about 3X10-6 liter of sample and allow the chromatograph to develop until all of the xylene isomers appear. temperature to 120OC. After t
49、he high boiling materials emerge, reset the column temperature to 7OOC. Calculate the percent of toluene and ethylbenzene as follows: Purge that column by raising the column i/ 2/ Percent toluene, v/v = (area of toluene peak) (1.017- (10)- (area of benzene peak) Percent ethylbenzene, v/v = (area of ethylbenzene peak) (1.054)1/(10)2/ (area of benzene peak) Lis the correction factor for the detector response -is the percentage of internal s
