1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Para. No. Revisions 2012 05 10 N Status No usage or replacement N. Benipal, NA 1978 12 11 Metricated and Retyped CAH1-RD572066-206 1969 04 29 Released AY1-815 3948-a Page 1 of 6 PRIMER SURFACER, LOW BAKE EPOXY - EXEMPT SOLVE
2、NT - TAUPE ESB-M6J120-C (10 % REACTIVE SOLVENTS) NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an epoxy type primer-surfacer possessing good gloss, enamel holdout and corrosion resistance and is formulated to cure at a minimum metal temperature of 135 C. This m
3、aterial contains rust inhibitive type pigments to provide maximum corrosion resistance in critical areas. 2. APPLICATION This specification was released originally for a primer-surfacer used as a substrate for automotive synthetic baking enamels when processing facilities are not available for the a
4、pplication of separate red and gray primer coats. Exempt solvent materials are used when conformance to the legal requirements of air pollution control authorities is mandatory for an assembly plant or other painting facility. 3. REQUIREMENTS The material shall meet all detailed requirements of this
5、 section. Tests shall be made on the basis of comparison with approved production material applied and tested under identical conditions. In the event that both the sample under test and the control material fail any requirements, that test shall be repeated. 3.1 COMPOSITION 3.1.1 Non-Volatile, min
6、53 % (FLTM BI 2-1) 3.1.2 Exempt Solvent The volatile portion shall not be photochemically reactive as defined below: A photochemically reactive solvent is any solvent with an aggregate of more than 10 % of its total volume composed of the chemical compounds classified below or which exceeds any of t
7、he following individual percentage composition limitations, referred to the total volume of solvent: . A combination of hydrocarbons, alcohols, aldehydes, esters or ketones having an olefinic or cycloolefinic type of unsaturation - 5 %. . A combination of aromatic compounds with eight or more carbon
8、 atoms to the molecule except ethylbenzene - 8 %. ENGINEERING MATERIAL SPECIFICATION ESB-M6J120-C 3948-b Page 2 of 6 . A combination of ethylbenzene, ketones having branched hydrocarbon structures, trichloroethylene or toluene - 10 %. Whenever any organic solvent or any constituent of an organic sol
9、vent may be classified from its chemical structure into more than one of the above groups of organic compounds, it shall be considered as a member of the most reactive chemical group, that is, that group having the least allowable percent of the total volume of solvents. Enamels or primers sent to v
10、arious regions of the country must conform to E.P.A. rules and regulations for that region. 3.1.3 Specific Composition 3.1.3.1 Volatile Portion Suppliers shall furnish, on request, certification of conformance to para 3.1.2 of this specification to Ford Motor Company Purchasing, AAD, TAE Paint Syste
11、ms and the assembly plant involved for each color supplied. 3.2 PHYSICAL PROPERTIES 3.2.1 Weight per Volume at 25 C 10.0 lb/gal (FLTM BI 2-2) (1.2 kg/L) 3.2.2 Viscosity 22 - 32 s (FLTM BI 11-1) 3.2.3 Stability (FLTM BI 2-3) The material shall not jell, settle hard or increase in viscosity in excess
12、of 10 s. 3.3 PREPARATION OF TEST PANELS All materials submitted for initial approval shall be tested on both cold rolled steel and minimum spangle temper rolled quality galvanized steel (ESB-M1A62 type) test panels for all requirements of this specification. 3.3.1 Primer-Enamel System (FLTM BI 3-2,
13、Method “C“, with the following exceptions) . Apply the primer (ESB-M6J120) directly to panels using current approved production material as a control. . Bake separate sets of panels at maximum and minimum cycles shown in para 3.3.3. ENGINEERING MATERIAL SPECIFICATION ESB-M6J120-C 3948-b Page 3 of 6
14、. Apply ESB-M50J100 quality enamel at 0.0016 +/- 0.0001 in (40 +/- 2 m) film thickness as follows: Black enamel Holdout 3.4.4 Water immersion 3.6.4 Humidity 3.6.5 White enamel All other tests. . Bake the enamel 10 min at 129 C metal temperature (17 min at 129 C - laboratory oven). 3.3.2 Primer Only
15、Reduce primer (ESB-M6J120) to same viscosity limits as in para 3.3.1. Spray to a dry film thickness of 0.00075 in (19 m). Bake at both cycles shown in para 3.3.3. 3.3.3 Baking The material shall pass all requirements when baked at both the following schedules: Metal Temperature Laboratory Oven* Bake
16、, min 8 min at 135 C 15 min at 135 C Bake, max 20 min at 163 C 30 min at 163 C *As specified in FLTM BI 3-2 3.4 APPEARANCE After preparing panels of the material under test and production primer according to para 3.3.1, the primer under test shall be equal to or better than current approved producti
17、on materials when tested under identical conditions for the following properties. 3.4.1 Color Taupe (No darker or lighter than master panels on file in the Body Materials Engineering Department) 3.4.2 Gloss, min 30 (FLTM BI 10-1, 60 Glossmeter) Panels are prepared per para 3.3.3. 3.4.3 Leveling The
18、primer film shall level with a minimum of orange peel. The surface of the material under test shall be equal to or better than current approved production material for smoothness when applied and baked under identical conditions. ENGINEERING MATERIAL SPECIFICATION ESB-M6J120-C 3948-b Page 4 of 6 3.4
19、.4 Holdout There shall be no evidence of dulling or strike-in when enamel color coat is applied over sanded or unsanded primer surfacer, and no difference in gloss of the color coat between sanded and unsanded primer. There shall be no prominence of sand scratches. Tests shall be made at both maximu
20、m and minimum bake cycles. 3.5.1 Dry Sanding Characteristics The primer, when applied and baked at both maximum and minimum cycles as outlined in para 3.3.3 shall dry sand (using a new sheet of 280 grit stearate filled paper for each panel) smoothly without clogging the paper and with a minimum of s
21、and scratches. The material shall be equivalent in all respects to current approved production primer applied and tested under identical conditions. 3.5.2 Adhesion (FLTM BI 6-1) Test material versus current approved production primer. 3.5.2.1 Enamel to Primer Prepare panels per para 3.3.1, except th
22、at only one-half of the adhesion test panel is to be sanded. Adhesion of ESB-50J100 quality enamel to sanded or unsanded primer shall be satisfactory and equal to or better than current approved material, with no chipping, flaking or peeling. 3.5.2.2 Primer to Metal Prepare panels per para 3.3.2. Ad
23、hesion shall be satisfactory and equal to or better than current approved primer, with no chipping, flaking or peeling. 3.6 RESISTANCE PROPERTIES 3.6.1 Chip Resistance (FLTM BI 7-1) Prepare panels according to para 3.3.1 using current approved production primer for comparison, and ESB-M50J100-A qual
24、ity white color coat. Chipping shall be no greater for the test material than for approved current production primer and shall not exceed Fig 4. ENGINEERING MATERIAL SPECIFICATION ESB-M6J120-C 3948-b Page 5 of 6 3.6.2 Salt Spray, min 240 h (FLTM BI 3-1) No failure in the specified times by blisterin
25、g, rusting or more than 1/8 in (3 mm) rust or blister creepage from a line scribed to bare metal on panels prepared according to para 3.3.2. 3.6.3 Bimetallic Salt Spray Corrosion (FLTM BI 3-1) No more than 1/8 in (3 mm) rust, blister creepage or loss of adhesion after (1) 240 h at the scribe, and (2
26、) 750 h on the CRLC steel adjacent to the joint (disregarding scribed area). Prepare panels according to FLTM BI 3-2, Method “C“ with the following exceptions: The test panels shall consist of two 4 x 12 in (100 x 300 mm) clean unphosphated panels (one polished CRLC steel and one minimum spangle tem
27、per rolled galvanized steel - ESB-M1A62 type) as described in FLTM BI 3-2, flanged and spot welded together along the 12 in (300 mm) dimensions to form a coach joint. The inside radius shall be 1/8 in (3 mm) and the flange shall be 5/8 in (16 mm) wide with spot welds spaced every 2 in (50 mm). The c
28、omposite panel shall be zinc phosphate coated per FLTM BI 3-1, primed with 0.0010 +/- 0.0001 in (25 +/- 2 m) of ESB-M6J120 baked for 8 min at 135 C metal temperature, (omit sanding), topcoat with 0.0018 +/- 0.0005 in (46 +/- 13 m) ESB-M50J100 white enamel and baked 10 min at 129 C metal temperature.
29、 The painted panel shall then be scribed to base metal across the two substrates, and aged 72 h at 23 +/- 2 C. 3.6.4 Water Immersion, min 500 h (FLTM BI 4-1) Panels are prepared according to para 3.3.1. No blistering or loss of gloss. 3.6.5 Condensing Humidity, min 240 h (FLTM BI 4-2 Procedure “A“)
30、Panels are prepared according to para 3.3.2. No blistering or loss of gloss. 3.6.6 Florida Exposure Panels prepared as in para 3.3.2, scribed with an “X“ to bare metal and exposed in the Miami, Florida area, at 5 facing south for 12 months shall show no blistering, peeling, or visible rusting along
31、the scribe marks more than 1/8 in (3 mm) total width. ENGINEERING MATERIAL SPECIFICATION ESB-M6J120-C 3948-b Page 6 of 6 3.7 PRODUCTION TRIAL Final approval of all functional and sanding characteristics shall be made by the using Manufacturing Divisions, of the material or painted part on the basis
32、of a shop trial under production conditions (Paint Test Report - Functional - Form -371). 3.8 SUPPLIERS RESPONSIBILITY Material supplied to this specification must be equivalent to that originally approved. Changes in formulation or processing shall not be made without prior approval as described in
33、 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 wil
34、l be added to the Engineering Materials Approved Source List. 5. GENERAL INFORMATION The material data included herein is for information only and is not a requirement for the supplier. 5.1 FLASH POINT, min 14 C (ASTM D 92) 5.2 FLAMMABILITY This material represents a potential fire hazard. The Manufacturing Engineering Department shall notify both the Plant Security and the Safety Units of its presence in the Plant to assure that proper fire precautions are provided. The location in which it is used or stored shall be included in the notifications.
