MIL-E A(m) AMENDMENT2 3 March 1980 SUPERSEDING AMENDMENT 1 22 October HTT-P-346 TT-P-375 TT-P Add the following under STANDARDS:

Transcription

1 t ML-E A(m) 3 March 1980 SUPERSEDNG AMENDMENT 1 22 October MLTARY SPECFCATON c ENAMEL, ALKYD, CAMOUFLAGE This amendment forms a part Of dated 21 May 1976 Military Specification ML-E-52798A(ME) PAGE 1 *12 Classification, add the!122 Types The enamel specified: following: shall be furnished in the following types as Type Type - Standard formulation for all colors - Non-Lead formulation for Forest Greentt PAGE 2 21, under SPECFCATONS, FEDERAL delete: HTT-P-346 TT-P-375 TT-P-390 *under SPECFCATONS, ~LTARy nml-e add: Pigment, Chrome Yellow and Chrome- Orange Dry Pigment, ndian Red and Bright Red (ron Oxide), Dry for use in Protective Coatings) Pigment, ron Oxide Black Synthetic, Dry Packaging, Packing and Marking oftr - Enamel, Lusterless, Zinc Phosphate, Styrenated Alkyd Type Add the following under STANDARDS: PAGE 3 llmjltary ML-STD Commercial Packaging of Supplies and Equipmenttl FSC 8010

2 ML-E-52798A(~) ( *Add the following under Other Publications: - AMERCAN SOCE~ D3335 FOR TESTNG AND MATERALS (ASTM) Test for Low Concentrations of Lead, Cadmium and Cobalt in Paint by Atomic Absorption Spectroscopy PAGE 7 *under TABLE Pigmentation, add the following: Forest Green,Type -Acid insoluble green pigment as in Type forest green, chromium oxide, organic yellow pi~ent derived from tetrachloroisoindoline,light s:able organic brown or maroon pigment, carbazole dloxane violet Add the following: * 3411 Zinc phosphate pigment, type only For colors Light Green, Forest Green, Dark Green and Olive Drab, Zinc Phosphate shall constitute 15 ~ 1 percent of the pigment by weight * 3412 Typ e composition Type shall contain no lead based pigments and lead content shall not exceed 006 percent by weight of total nonvolatile content -/ upon analysisq * Change TABLE V to include the following: PAGE 9 Forest Green, Type - Total Solids Min 60 Pigment , Vehicle Solids - 18 min Extender - 50 max Contrast Ratio min *Make the following changes for type only: (New Column) Zn P04 Max Min Max!1361? Light Green delete 50 add ~i36?! Forest Green delete 50 add delete C15011add 1! Dark Green 1136~! 150 add olive Drab delete PAGE 2 of 5

3 -4 ( ML-E-52798A(ME) AMENDMENT 2 PAGE Accelerated weathering Change sentence beginning on line 4 to read: n addition, the color after accelerated weathering shall remain within 25 NBS Units of chromaticity and the average of the visual-reflectance values specified in table 1, *Add the following to this paragraph: For Type Forest Green, the color change shall be less than 10 NBS Unit PAGE Pigment analysis: Change sentence beginning on line 2 to read: Make appropriate qualitative=d quantitative tests on the extracted pigment to determine if only permissible pigments were used in formulating the different colors and zinc phosphate is present in colors Light Green, Forest Green, Dark Green and Olive Drab Add the following paragraphs: PAGE 17 * 4331 Zinc phosphate content The zinc phosphate content shall be analyzed in accordance with 4334 of ML-E * 4332 Lead content (type only) - * Determination oflead by atomic absorption spectroscopy Determine percent of lead in accordance with ASTM Method D3335 Nonconformance to 3412 shall constitute failure of this test * Determination of lead by X-ray emission spectrometric analysis (alternate method) * Test panel preparation Using 100 grams of a known lead free type 11 enamel, prepare standard aliquots containing 000, 003, 006, and 009 percent lead metal, based on total nonvolatile paint, by adding calculated amounts of lead napthenate of a known lead content Thoroughly, mix the aliquots to incorporate,the lead and draw down the standards and enamel to be tested on duplicate black and white Merest cards using a inch (0004 inch gap clearance) film applicator Dry for 48 hours at a temperature of 23 + ll C (734 + Z F), a relative humidity of percent, and under dust f;ee conditi~ns Cut the drawdowns into a suit;ble size and shape to fit the sample holder of the X-ray fluorescence spectrometer * using an X-ray X-Ray analytical procedure Lead content shall be determined fluorescence spectrometer capable of determining lead content at,a PAGE 3of 5

4 ML-E-52798A(ME)! - minimum level of 003 percent by weight of the total nonvolatile paint The parameters of angle, crystal, pulse height selection, counting time, collimator, X-ray tube, voltage and amperage, shall be established for a wave length -~ dispersive fluorescence spectrometer according to conventional X-ray analytical procedures The analytical linepb L-alpha or Pb L-beta shall be used To calibrate, place the known standrds in the X-ray unit and measure the count rates of lead, lead background and the Compton scattered background from the X-ray tube The ratio R, of net lead intensity and Compton scattered background is calculated as follows: lpb - (pb Background + pb Background ) R= 2 Compton Line Where = Gross ntensity and the background is taken on each side of the Pb line Establish a lead calibration curve using these results Determine the lead content of the test paint using the above procedure and calibration curve, using an energy dispersive fluorescence spectrometer, it shall be set up in accordance with the manufacturer s manual When * Failure criteria Nonconformance to 3412 shall constitute failure of this test PAGE 22 44, delete and substitute as follows: - 44 nspection of packaging nspection of military levels of packaging shall be in accordance with PPP-P-1892 Commercial packaging shall be inspected for conformance to ML-STD , delete and substitute as follows: 51 Preservation, packing and marking Preservation shall be level A or commercial and packing shall be level A, level B or Commercial as specified (see 62) Level A preservation, level A or B packing and military packaging marking shall be in accordance with PPP-P-1892 Commercial preservation, packing and marking shall be in accordance wth ML-STD-1188 The enamel shall be furnished in the sizeof container specified (see 6C2) 61 ntended use; change last sentence to read: For adequate camouflage properties, it is necessary to apply the enamel to a minimum dry film thickness of inch

5 s ML-E-52798A(ME) (c), delete and Substitute as OllOws:- (c) Degree of preservation and degree of packing required (see 51) PAGE 24 ljndertable V delete: Cirome Yellow TT-P-346 Type 4285 Red ron Oxide TT-P-375, Type ~ Black ron Oxide T r-p AAdd to TABLE V Acid nsoluble Green Pigment Chromium Oxide Organic Yellowl Organic Brownz Forest Green Type llrgazne2glt yellow HOSTOPERM Brown HRF The margins of this amendment are marked with an asterisk to indicate where changes (additions, modifications, corrections, deletions) from the previous amendment were made* This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies n these no~ations Bidders and contractors are cautioned to evaluate the requirements of this document based on the e ntirecontent irrespective of the marginal notations and relationship to the last previous amendment- Custodian: Army - ME Preparing activity: Army - ME Review activities: Amy - ER, MD, MR, M, EA Useractivity: Army - AT Project 801O-A163 PAGE 5 of 5 --

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