1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Para. No. Revisions 2012 09 20 N-STATUS No replacement J. Crist, NA 1978 05 12 Metricated and Retyped CAH1-RD572066-29 1977 01 11 Released AG1-6000-181 3948-a Page 1 of 8 ENAMEL, ACRYLIC BAKING - NON-AQUEOUS DISPERSION (NAD)
2、 - ESB-M50J100-B EXTERIOR BODY QUALITY NOT FOR NEW DESIGN 1. SCOPE The material defined by this specification is an amino modified thermosetting acrylic resin, in the form of finely divided particles dispersed in a non acqueous solvent, which is pigmented baking gloss enamels suitable for exterior e
3、xposure. 2. APPLICATION This specification was released originally for paint used as the final color coat on automotive bodies, hoods, fenders and other exterior parts, and shall be satisfactory for use over specified primer, enamel sealers, or over baked enamel, as in repair or tu-toning operations
4、. 3. REQUIREMENTS 3.1 COMPOSITION 3.1.1 Vehicle Solids The vehicle solids shall be melamine modified acrylic polymers with minor amounts of other modifiers and/or plasticizers. No alkyd resin modification is permitted. 3.1.2 Pigment The pigment shall be balanced and blended so that the finished enam
5、el matches the Ford Motor Company master panel in color and luster and meets the requirements of this specification for durability. 3.1.3 Specific Composition When it is necessary to obtain specific data regarding enamel formulations, it is understood that suppliers will furnish such data on request
6、. 3.1.4 Volatile Proportions of Solvents: The proportions of solvents in the volatile portion shall be so arranged that the enamel will level out satisfactorily on spray application. The volatility of the solvents is to be selected to provide a dried film of 0.00150 in (39 m) minimum without sagging
7、 and with satisfactory freedom from roughness or dry spray. The volatile portion shall contain sufficient active solvents to give satisfactory adhesion when the enamel is applied over a previously baked coat of the enamel. Refer to ESB-M50J103-C, D for exempt solvent requirements. ENGINEERING MATERI
8、AL SPECIFICATION ESB-M50J100-B Page 2 of 8 3.1.5 Specific Composition Suppliers shall furnish, on request, certification of conformance to para 3.1.4 of this specification to Ford Motor Company Purchasing, AAD, Paint Operations, and the assembly plant involved for each color supplied. 3.1.6 Toxicity
9、 The enamels shall contain no benzol (benzene), chlorinated or other toxic compounds, or hydrolyzable chlorine derivatives or have an obnoxious or objectionable odor. 3.2 PHYSICAL PROPERTIES 3.2.1 Non-Volatile Solids (FLTM BI 2-1) Minimum solids content for various color classes are shown in the tab
10、le, para 3.2.5. These solids limits apply to enamels adjusted to a viscosity of 22 s #4 Ford Cup at 23 +/- 2 C. 3.2.2 Viscosity (FLTM BI 11-1) 23 +/- 3 s #4 Ford Cup, during first 30 days after manufacture, 32 s maximum after 90 days. 3.2.3 Shelf Stability The enamel shall not jell or liver upon sta
11、nding and must be free from settling which is not dispersed by normal agitation. 3.2.3.1 Oven Stability (FLTM BI 2-3) The viscosity of the enamel shall not increase more than 10 s. 3.2.4 Hiding Power, Wet (FLTM BI 1-1) Maximum black and white Cryptometer readings are shown in the table, 3.2.5. Test
12、Conditions: . Viscosity 38 - 40 s #2 Ford Cup at 23 +/- 2 C . Wedge constant 0.002 in (0.05 mm) for Black 0.007 in (0.18 mm) for all other colors Reduce enamel with solvent currently used in production. ENGINEERING MATERIAL SPECIFICATION ESB-M50J100-B Page 3 of 8 3.2.5 Solids, Hiding and Gloss % Sol
13、ids Hiding (1) Gloss Color Class Minimum Maximum Minimum (3.2.1) (3.2.4) (3.4.2) Light metallic colors 37 (2) 72 Medium and dark metallic colors 37 (2) 76 Black 40 15 88 All dark solid colors 43 18 80 Reds, maroons 43 20 78 Medium dark colors, including light reds and oranges (20 - 80 % TiO2) 48 18
14、80 Medium colors (80 - 95 % TiO2) 46 14 80 Light colors (95 % or more TiO2) 50 14 80 Chrome colors (80 % or more lead or molybdenum chromate) 48 (2) 80 White 52 14 76 (1) For Quality Control tests use wet hiding values shown in the table. For initial approval, the dry hiding requirements (3.2.6) of
15、1.5 mils (38 m) must be met for all colors. When a discrepancy exists, final decision shall be made on the basis of dry hiding (3.2.6). (2) See para 3.2.6 for dry hiding requirements. 3.2.6 Hiding Power, Dry (FLTM BI 1-5) The enamel shall have complete visual hiding at 0.0015 in (38 m) dry film thic
16、kness. 3.3 PREPARATION OF TEST PANELS (FLTM BI 3-2) The following requirements are specific for these materials in addition to those shown in the test method. ENGINEERING MATERIAL SPECIFICATION ESB-M50J100-B Page 4 of 8 3.3.1 Spray Primer-Enamel System Apply ESB-M6J119-B reduced to 43 +/- 2 Sec #2 F
17、ord Cup with appropriate thinner to 0.0010 in (25 m) total dry film thickness. Bake primer 20 min at 163 C metal temperature for adhesion tests per para 3.5.3 and 20 min at 149 C (8 minutes minimum at 135 C metal temperature) for all other tests. Sand 1/2 of one panel for adhesion tests only. 3.3.2
18、Enamel Apply enamel reduced to 35 - 40 s #2 Ford Cup at 23 +/- 2 C with solvent currently used in production to a dry film thickness of 0.0015 - 0.0020 in (39 - 50 m) (enamel only). Bake per para 3.3.7. 3.3.3 Electrocoat Primer - Enamel System Apply a currently approved electrocoat primer to a dry f
19、ilm thickness of 0.00070 +/- 0.00010 in (18 +/- 2 m) dry film thickness. Bake 20 min at 183 C (10 min at 183 C metal temperature). Sand 1/2 of one panel for adhesion tests only. 3.3.4 Enamel Sealer (If appropriate) Apply ESB-M99J222 (reduced to 37 s, #2 Ford Cup at 23 +/- 2 C with solvent currently
20、used in production) to 0.00050 - 0.00075 in (13 - 19 m) dry film thickness. Bake 20 min at 138 +/- 3 C. 3.3.5 Enamel (See para 3.3.2) 3.3.6 Aging Age panels before testing as shown in the respective tests. 3.3.7 Baking Cycles The following three baking schedules are required: . Standard bake 17 min
21、at 129 C - ambient . Minimum 8 min at 118 C plus an additional 3 min at 129 C - metal temperature . Maximum 20 min at 143 C - metal temperature The standard bake shall apply to the following tests: ENGINEERING MATERIAL SPECIFICATION ESB-M50J100-B Page 5 of 8 Para 3.4.1 Color Para 3.4.2 Gloss Para 3.
22、5.4 Bleeding Para 3.6 Resistance properties Para 3.7.1 Repair color match The minimum bake shall apply to the following tests: Para 3.5.3 Adhesion Para 3.7.2 Intercoat adhesion (second enamel coat) The maximum bake shall apply to the following tests: Para 3.4.1 Color Para 3.4.3 Gloss after rebake Pa
23、ra 3.7.2 Intercoat adhesion (first enamel coat) 3.4 APPEARANCE 3.4.1 Color (FLTM BI 9-1) Color shall match the Ford Motor Company master panel after all of the baking cycles described in para 3.3.7. 3.4.2 Gloss (FLTM BI 10-1, 20 Glossmeter) Minimum gloss requirements, by color class, are shown in pa
24、ra 3.2.5 for panels baked at standard bake, para 3.3.7. 3.4.3 Gloss After Rebake Using a 20 Gardner Glossmeter, no more than 4 units decrease in gloss is permitted when panel is rebaked per para 3.3.7. 3.4.4 General The enamel shall bake out to a presentable, serviceable film showing no craters, pin
25、holes, seediness, abnormal roughness or excessive metallic mottling. It shall have a reasonable tolerance for ordinary cleaning, and exhibit excellent polishing characteristics when wheel polished with a wide range of various compounds and cleaners. 3.5 FILM PROPERTIES 3.5.1 Film Thickness (Enamel O
26、nly) 0.0015 - 0.0020 in (FLTM BI 17-1) (39 - 50 m) 3.5.2 Hardness FLTM BI 12-1, Sward (Alternate), min 36 FLTM BI 12-2, Tukon, K.H.N., min 7.5 ENGINEERING MATERIAL SPECIFICATION ESB-M50J100-B Page 6 of 8 Bake panels per standard schedule in para 3.3.7. Hardness and polishing characteristics shall be
27、 such that airborne dirt dried in the film, dry spray areas, or other surface defects can be removed by sanding and polishing. After sanding with #600 grit paper lubricated with mineral spirits, then wheel polished with a medium grit compound, there shall be no noticeable change in the sheen between
28、 the polished and unpolished areas. 3.5.3 Adhesion The enamel shall be baked per minimum schedule shown in para 3.3.7. 3.5.3.1 Scratch Test (FLTM BI 6-1) No chipping over sanded or unsanded primer. 3.5.3.2 Chip Resistance (FLTM BI 7-1) A minimum of 80 % of the enamel shall be retained on the test pa
29、nel. Chipping shall not exceed Fig 3. 3.5.4 Bleeding None permitted (FLTM BI 14-1) 3.5.5 Polishing The enamel surface shall be capable of being sanded and polished, or polished only, to minimize orange peel or to remove defects. No noticeable change in gloss or appearance except for a minimum of pol
30、ishing lines shall result. Deep polishing lines or swirl marks are not acceptable. 3.6 RESISTANCE PROPERTIES 3.6.1 Salt Spray Resistance, min 240 h (FLTM BI 3-1) There shall be no blistering, no more than 1/8 in (3 mm) rust creepage, or loss of adhesion, from a line scribed through to the bare steel
31、. 3.6.2 Water Immersion, min 240 h (FLTM BI 4-1) There shall be no blistering, peeling, dulling, or roughening. 3.6.3 Weathering Resistance Steel panels prepared per para 3.3, using the standard bake and catalyzed repair enamel prepared per FLTM BI 15-2 shall be exposed at 5 facing south in the Miam
32、i, Florida, area for 12 months. Exposed panels shall be washed and polished per FLTM BI 3-5. After exposure, the panels shall show no more evidence of chalking, dulling, fading, or other color change than the standard master sample on file ENGINEERING MATERIAL SPECIFICATION ESB-M50J100-B Page 7 of 8
33、 in the Body Materials Engineering Department and shall be no worse than that exhibited on the exposure panels which were submitted by the supplier as proof of durability. In addition, panels shall be free from checking, cracking, peeling, blistering and rusting after exposure. High metallic colors
34、shall not exhibit peeling or blistering when immersed in de-ionized water for 16 h and tested per FLTM BI 4-1 after completion of Florida exposure testing. The Florida exposed panels will be prepared for assessment as follows: 1/3 washed and polished 1/3 washed only 1/3 will remain as received from
35、Florida 3.6.4 Accelerated Weathering (FLTM BO 1-1) Panels prepared for FLTM BI 3-2, shall show a minimum degree of fading, chalking or dulling. No increase of brittleness or loss of adhesion is permitted and panels shall be completely free from evidence of cracking, checking, blistering or peeling w
36、hen exposed for 400 h in an Atlas XW Weatherometer. Florida exposure results shall take precedence over weatherometer results. 3.6.5 Resistance to Water and Soap Spotting (FLTM BI 13-1) 3.6.5.1 Water Spot Discoloration None permitted. 3.6.5.2 Soap Spot Discoloration None permitted. 3.6.6 Resistance
37、to Acid Spotting (FLTM BI 13-5) The enamel shall show no discoloration after 10 min. Discoloration after 20 and 30 min shall be no greater than the standard on file in the Body Materials Engineering Department Laboratory. 3.6.7 Cold Checking Resistance (FLTM BI 7-2) The enamel, shall withstand a min
38、imum of 10 cold test cycles without cracking or noticeable dulling when cured at the minimum baking temperature. 3.6.8 Resistance to Xylol There shall be no dulling, softening or other undesirable effects after the enamel, which has been aged 72 h, is rubbed 10 times in a circular motion with a pad
39、of cheesecloth wetted with xylol and allowed a 30 min recovery period. ENGINEERING MATERIAL SPECIFICATION ESB-M50J100-B Page 8 of 8 3.7 REPAIR REQUIREMENTS 3.7.1 Repair Color Match (FLTM BI 15-1) Enamel shall show satisfactory color match after recoating and rebaking at standard bake. 3.7.2 Intercoa
40、t Adhesion (FLTM BI 6-2, Method “B“) The enamel shall show no loss of adhesion over sanded or unsanded color coat. 3.7.3 Repair Using Catalyst (FLTM BI 15-2) Enamel shall show satisfactory color match and intercoat adhesion and have a minimum hardness of 5 K.H.N. using an approved catalyst at recomm
41、ended concentration. Baking temperature for the repair coat shall be 20 min at 99 C (ambient) with a minimum of 5 min at 99 C (metal temperature). 3.7.3.1 Weathering Resistance Panels shall be prepared per FLTM BI 15-2 and exposed at 5 facing south in the Miami, Florida, area for 12 months. The cata
42、lyzed repair enamel shall meet all requirements of para 3.6.3. 3.8 Production shipments shall be equivalent to approved purchase samples in laboratory and production use. 3.9 SUPPLIERS RESPONSIBILITY Material supplied to this specification must be equivalent to that originally approved. Changes in f
43、ormulation or processing shall not be made without prior approval as described in Supplier Procedure I-A. 4. APPROVAL OF SUPPLIERS Suppliers to this specification must be approved by the affected product engineering office. Procedure for gaining approval of a specific material to a new/existing ES-M specification is contained in Supplier Procedure I-A. Approved new suppliers will be added to the Engineering Materials Approved Source List.
