1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 02 2011 12 07 N Status No replacement named N. Benipal, NA 2005 07 28 Revised Inserted 3.0; Deleted 3.7 & 4 1981 03 19 Released CALI-MF-588532-1 Controlled document at www.MATS Copyright 2011, Ford Global Technologies, LLC Page 1 of 4 PAI
2、NT, POWDERED, THERMOSETTING EPOXY ESB-M70J4-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE This specification defines the material requirements of a thermosetting epoxy powder for electrostatic application to metal parts. 2. APPLICATION This specification was released originally as a coating specified for
3、 bumper attachment and reinforcement components as an isolation coating between the steel components and aluminum bumpers. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materi
4、als (WSS-M99P1111-A). 3.1 COMPOSITION 3.1.1 Specific Composition When it is necessary to obtain specific data regarding powder coating formulations, suppliers will furnish such data on request. 3.1.2 Vehicle Solids The vehicle solids shall be epoxy resins modified with suitable cross linking catalyt
5、ic and flow control agents as necessary to meet the requirements of para 3.2 - 3.4. 3.1.3 Pigment The pigment portion shall contain the necessary corrosion inhibiting pigments and/or flattening agents to meet the requirements of para 3.2 - 3.4. 3.1.4 Toxicity All suppliers of powder must provide a t
6、oxicological study to the Industrial Hygiene Department of the Ford Motor Company for evaluation of any potential health hazards associated with the use of their product. 3.2 PHYSICAL PROPERTIES 3.2.1 Non-Volatile Solids, min 99.0% when tested 3 h at 107 C and (ASTM D 3451) 95.0% when tested 30 min
7、at 191 C ENGINEERING MATERIAL SPECIFICATION ESB-M70J4-A Copyright 2011, Ford Global Technologies, LLC Page 2 of 4 3.2.2 Shelf Stability The powder must be capable of satisfactory application without conditioning after 6 months storage at 20 +/- 5 C. 3.2.3 Particle Size Distribution 20 - 40 m with 90
8、% less (ASTM D 3451) than 30 m 3.2.4 Specific Gravity 1.30 +/- 0.05 (ASTM D 153) 3.3 PREPARATION OF TEST PANELS Panels shall be prepared as described by ASTM D 3451 with the following specific requirements: The coating shall be tested over the following substrates (see para 5.2). . PTQ unpolished co
9、ld rolled steel . ESB-M1A62 Galvanized steel . Bimetallic coachjoint panels, salt spray and APGF only (para 3.4.5 and 3.4.6) All substrates are to be zinc phosphated per ESB-M3P1 or iron phosphated per ESB-M3P2 prior to coating. The candidate powder shall be electrostatically applied and cured as fo
10、llows: 3.3.1 Bake Schedule, min 8 minutes at 191 C metal temp 3.3.2 Cured Film Thickness, min 0.003 in (76.2 m) (FLTM BI 117-01) Panels shall be aged 16 h at 43 C or 72 h above 23 +/- 2 C before testing for resistance properties. 3.4 FILM PROPERTIES 3.4.1 Color Black (unless specified otherwise) 3.4
11、.2 Adhesion No flaking or chipping (FLTM BI 106-01) (Grade 0) 3.4.3 Cure Test No softening or color transfer Test Method: Using a cloth saturated with a solution of 80% isopropyl alcohol and 20% toluene, rub 10 circular rubs on the coating and examine. 3.4.4 Chip Resistance, max 4B (SAE J 400, 1 pt
12、(0.5L) of gravel) ENGINEERING MATERIAL SPECIFICATION ESB-M70J4-A Copyright 2011, Ford Global Technologies, LLC Page 3 of 4 3.4.5 Salt Spray (FLTM BI 103-01) 3.4.5.1 PTQ and Galvanized Steel Panels 500 h No failure in the specified times by blistering, rusting or more than 1/8 in (3 mm) rust or blist
13、er creepage from a line scribed to bare metal. 3.4.5.2 Bimetallic, Coachjoint Panels No more than 1/8 in (3 mm) rust, blister creepage or loss of adhesion after: (1) 500 h at the scribe to bare metal, across both substrates and at right angles to the joint. (2) 750 h at the joint on either the steel
14、 or galvanized side. 3.4.6 APGF - Corrosion Test 60 cycles (Do not scribe) 3.4.6.1 PTQ and Galvanized Steel Panels No failure after the specified number of cycles by face blistering, rusting or cracking, or more than 1/4 in (6 mm) rust or blister creepage from an edge. 3.4.6.2 Bimetallic, Coachjoint
15、 Panels No more than 1/4 in (6 mm) rust or blister creepage adjacent to the joint on either side of the joint after the specified number of cycles. Test Method: Panels prepared according to para 3.3 shall be placed in the following conditions: Step 1: 1.5 h drying period of approximately 50 C in a d
16、ehumidifying atmosphere. Step 2: 0.25 h salt spray (5% salt solution shower). Step 3: 22.25 h soak* in a humidity chamber controlled at 49 +/- 2 C at 95 - 100% relative humidity. Step 4: Repeat steps 1-3 three (3) additional times. Step 5: 2 h at -18 +/- 2 C (dehumidify) Step 6: 2 h at 49 +/- 2 C (d
17、ehumidify) Step 7: 2 h at -18 +/- 2 C (dehumidify) Step 8: 0.75 h at 23 +/- 2 C ENGINEERING MATERIAL SPECIFICATION ESB-M70J4-A Copyright 2011, Ford Global Technologies, LLC Page 4 of 4 Step 9: 0.25 h salt spray (5% salt solution shower) Step 10: 65 h soak* in a humidity chamber controlled at 49 +/-
18、2 C at 95 - 100% relative humidity. This constituted five (5) complete cycles. * Note: A total of 2160 +/- 50 h of soak time is required for a 60 cycle test. The additional time required (312 +/- 50 h) should be equally distributed throughout the test duration. 3.5 EXPLOSION HAZARD These materials s
19、hould be used in a closed system specifically designed for their use because of the possibility of dust explosion present in powdered materials. 3.6 HANDLING PRECAUTION This material shall be considered as relatively non-toxic compared to liquid epoxies. However, since it is an epoxy, care should be
20、 taken to avoid prolonged exposure to the skin. This material should be used in a closed system to reduce the possibility of breathing the powder. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 PA
21、INT PERFORMANCE SPECIFICATION REFERENCES ESB-M2P120 Paint Performance - Non-Visible Corrosion Resistant, Epoxy Powder Coating 5.2 PANEL INFORMATION 5.2.1 Standard unpolished, bimetallic coachjoint, and galvanized steel test panels are available from the Parker Co., 322 Main Street, Morenci, Michigan
22、 49256. 5.2.2 Steel for PTQ test panels is periodically selected by the Materials and Corrosion Protection Engineering Department from coils representative of production steel employed in Ford production body panels. This steel is specified for many primer salt spray tests and may be procured from t
23、he Materials and Corrosion Protection Engineering Department in panel form either phosphated or oiled. 5.2.3 Bimetallic Coachjoint Panel Construction The test panels shall consist of two 4 x 12 in (100 x 300 mm) clean unphosphated panels (one unpolished CRLC steel and one minimum spangle temper roll
24、ed galvanized steel - ESB-M1A62 type) as described in FLTM BI 103-02, flanged and spot welded together along the 12 in (300 mm) dimensions to form a coachjoint. 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 composite coachjoint panel shall be zinc phosphate coated per ESB-M3P1 or iron phosphate coated per ESB-M3P2 prior to powder coating.
