NAVY TT-C-492 C (1)-1977 COATING COMPOUND PAINT ANTISWEAT [Use In Lieu Of NAVY TT-C-00492 B]《防露漆涂层混合物 [使用代替 海军 TT-C-00492 B]》.pdf

1、TT-C-49 2C AMENDMENT- 1 June 23, 1977 FEDERAL SPECIFICATION COATING COMPOUND, PAINT ANTISWEAT This amendment, which forms a part of Federal Specification TT-C-492CI dated May 31, 1974, was approved by the Commissioner, Federal Supply Service, General Services Administration, for the use of all Feder

2、al agencies. PAGE 1 Paragraph 2.1, under “Federal Specifications“, change “TT-P-143“ to “PPP-P-1892“. Paragraph 2.2 , under “American Society for Testing and Materials (ASTM) Standards“, delete “D 2088 - Test for Low Concentration Lead“ and add the follawing references: D 93 D 562 - Test for Consist

3、ency of Paints Using the Stormer Viscosimeter. D 1475 - Test for Density of Paint, Varnish, Lacquer and Related Products. D 2369 - Volatile Content of Paints. - Test for Flash Point by Pensky-Martens Closed Tester. PAGE 2 Table I, last line, change maximum lead requirement from “0.5“ to “0.06“. Add

4、paragraph 3.5.9 as follows: no more than 0.06 percent lead by weight of the total nonvolatile. 3.5.9 Lead content. When tested as specified in 4.3.14, the coating shall contain PAGE 3 Table II, add an additional column under tests for “ASTM method“ and make the following changes : line 10, delete “4

5、041“ under Fed. Test Method Std. No. 141 and add “D 2369“ under ASTM method. line 11, delete “4281“ under Fed. Test Method Std. No. 141 and add “D 562“ under ASTM method. line 14, delete “4293“ under Fed. Test Method Std. No. 141 and add ID 93“ under ASTM method. line 16, delete “4184“ under Fed. Te

6、st Method Std. No. 141 and add ID 1475“ under ASTM method. last line, delete “table I“ under requirement reference and add “3.5.9“. PAGE 4 Paragraph 4.3.14, delete in its entirety and add the followinq: 4.3.14 Lead content. 4.3.14.1 Sam le reparation. Using a 0.006-inch film applicator and a mechani

7、cal applicator plate: duFlicate drawdowns for ea& sample of well-mixed paint shall be made on a standard paint penetration chart and dried for 24 hours. The drawdown shall be at least 10 inches long on the sealed portion of the penetration chart. The drawdown shall be cut into discs of appropriate s

8、ize to fit the sample holder of a fluorescence x-ray spectrometer. FSC 8010 M Licensed by Information Handling ServicesI - - TT-C-472C (I) 0 W 9979974 0004736 8 W TT-C-4 92C PAGE 4 Con. 4.3.14.2 Procedure. Lead content shall be determined using an x-ray fluorescence spectrometer capable of determini

9、ng lead content at a minimum level of 0.03 percent by weight of the total nonvolatile. The settings r a wavelensth dispersive fluorescence spectrometer shall be as follows : (7 Analytical Colli- X-ray tube Element Line Angle Crystal Detection meter - (MO)_ Pb L 33.93 LiF(2OO) Flow S.C. Fine 60Kv 45M

10、a Pb (backgrd I) 33.00 LiF(2OO) Flow S.C. Fine 60Kv 45Ma Pb (backgrd II) 35.50 LiF(200) Flow S.C. Fine 60Kv 45Ma Mo K 20.33 LiF(2OO) Flow S.C. Fine 60Rv 45Ma Pulse height selection shall be used in all measurements and countinq tin- shall be 100 seconds. Place the sample disc in the wavelength dispe

11、rsive unit. Measure the count rates of lead, lead background, and the Molybdenum ComDton scattered background from the x-ray tube. 4.3.14.3 Calculation. where I equals gross intensity. These results shall be comnared to those obtained using a 0.06 percent lead standard made up from the same type of

12、paint sample, and evaluated for compliance with 3.5.9. (1) Energy dispersive fluorescence spectrometers shall be set un accordina to the manufacturer Is mgnual. PAGE 5 Paragraph 5.1, line 2, change “TT-P-143“ to “PPP-P-1892“. , U.S. GOVERNMENT PRINTIK OFFICE : 1977 - 241-237/2404 Licensed by Information Handling Services