1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 02 2011 12 07 N Status No replacement named N. Benipal, NA 2005 07 29 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.11, 3.12 and 4 1990 03 01 Released C01031533 C.E. Herriot, concurred J. Schult Controlled document at www.MATS Copyright
2、2011, Ford Global Technologies, LLC Page 1 of 5 PAINT, POWDER, THERMOSETTING WSK-M70J8-A POLYESTER, EXTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is for an excellent decorative finish with exterior thermosetting polyester powder coating application to met
3、al parts. The powder coating shall provide good initial appearance with excellent durability and corrosion resistance. 2. APPLICATION This specification was released originally as a polyester powder coating of excellent corrosion resistance with specified color and gloss. It is intended for electros
4、tatic spray or fluidized bed application over such substrates as cold rolled auto steel, zinc die cast, chrome plated steel and die cast, aluminum, zinc galvanized and stainless steel parts. It is especially for use as a top coat with zinc phosphated rounded-edge sheet and molded parts, or as top co
5、at on cathodic electrodeposited primer for burred-edge parts. Epoxy based resins are not permitted. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3
6、.4 COMPOSITION 3.4.1 Binder The binder shall be a thermosetting resin. It shall have sufficient thermal stability for processing. There should be essentially no volatility of the resin or its modifiers during curing. Epoxy based powders are not permitted. 3.4.2 Pigment Inert pigments and additives t
7、o obtain the desired color and gloss. 3.4.3 Specific Composition When it is necessary to obtain specific data regarding material formulation, it is understood that the supplier will furnish such data on request. ENGINEERING MATERIAL SPECIFICATION WSK-M70J8-A Copyright 2011, Ford Global Technologies,
8、 LLC Page 2 of 5 3.5 PHYSICAL PROPERTIES 3.5.1 Storage Stability Fill 2 liters of the powder under test into two cylindrical boxes of 150 +/- 10 mm diameter. Close one of the boxes airtight with a suitable lid and store the two boxes for 8 weeks at 30 +/- 2 C in a laboratory oven using recirculating
9、 air. The material shall not cake or change its application or any other properties. 3.6 PREPARATION OF TEST PANELS 3.6.1 Substrate Ford Engineering Approved Standard Steel Test Panels zinc phosphated with approved phosphate to WSK-M3P1-C requirements. Panels must be heated for 10 minutes at 140 C m
10、etal temperature and cooled down to room temperature in a desicator prior to powder application. 3.6.2 Application Apply powder under test by electrostatic spray gun to a baked film thickness as recommended by the vendor. 3.6.3 Film Thickness, min 30 micrometre (FLTM BI 117-01) 3.6.4 Bake Bake for 1
11、0 minutes at 200 +/- 2 C metal temperature 3.7 APPEARANCE The powder shall bake out to a presentable, serviceable film showing no craters or pinholes. It shall have a reasonable tolerance for ordinary cleaning. 3.7.1 Color (FLTM BI 109-01) As specified on the Engineering Drawing or Color Release Sup
12、plementary. Shall match the relevant approved Master Appearance Sample (MAS) Panel. ENGINEERING MATERIAL SPECIFICATION WSK-M70J8-A Copyright 2011, Ford Global Technologies, LLC Page 3 of 5 3.7.2 Gloss (FLTM BI 110-01, 60 glossmeter) As specified on the Engineering Drawing. Shall be specified by mean
13、s of a letter suffix listed in the Material Specification to the color number assigned by the color release system. A = min 92 units E = 50 +/- 3 B = 80 +/- 5 F = 35 +/- 3 C = 70 +/- 4 G = 15 - 20 D = 62 +/- 4 H = 10 - 15 J = 5 - 10 3.7.3 Leveling The surface of the material under test shall be equa
14、l to or better than current approved production material for smoothness when applied and baked under identical conditions. 3.8 FILM PROPERTIES 3.8.1 Film Thickness, min 30 micrometre (FLTM BI 117-01) Coating must be sufficient to meet all performance requirements of this specification. 3.8.2 Initial
15、 Hardness The finish shall be sufficiently cured at the time of packing to withstand normal handling and shipping without damage. 3.8.3 Final Hardness Surface, Pencil, min 3H (FLTM BI 151-01) 3.8.4 Dry Hiding Power The finish shall give complete visual hiding on the substrate at 30 micrometre dry fi
16、lm thickness maximum. 3.9 RESISTANCE PROPERTIES 3.9.1 Paint Adhesion Grade 0 (FLTM BI 106-01, Method B) No chipping 3.9.2 Water Resistance, min 240 h (FLTM BI 104-01) No blistering, softening, dulling, color change or loss of adhesion. Adhesion tested according to item 3.9.1. No chipping permitted.
17、ENGINEERING MATERIAL SPECIFICATION WSK-M70J8-A Copyright 2011, Ford Global Technologies, LLC Page 4 of 5 3.9.3 Salt Spray Resistance, min 480 h (FLTM BI 103-01) No rust spots, blistering, chipping, peeling, gloss loss, rust creepage or adhesion loss greater than 3 mm from a line scribed to bare meta
18、l. 3.9.4 Water and Soap Spot Resistance (FLTM BI 113-01) 3.9.4.1 Water Spotting, max discoloration AATCC Rating 4-5 3.9.4.2 Soap Spotting, max discoloration AATCC Rating 4-5 3.9.5 Acid Spot Resistance (FLTM BI 113-05, 10 minutes) max discoloration None 3.9.6 Xylol Wipe Resistance No dulling, softeni
19、ng or other undesireable effects after the sample, which has been aged 72 h at 23 +/- 2 C, is rubbed 10 times in a circular motion with a wad of cheesecloth wetted with Xylol and allowed a 30 minute recovery period. 3.9.7 Chip Resistance, max Rating 1 (FLTM BI 107-01) Maximum area loss 0.01% 3.9.8 S
20、tone Chip Resistance, max Rating 3 (FLTM BI 157-04) 3.9.9 Wax/Dewax Compound Resistance Application of current wax preservative after one hour ageing of painted finish at 23 +/- 2 C and the removal of the preservative after a further 72 hours by any current dewaxing compound shall have no deleteriou
21、s effect on the quality or appearance of the paint film. 3.10 WEATHERING 3.10.1 Florida Exposure, 12 months AATCC Rating 4 (FLTM BI 160-01) 5 south, direct weathering inland ENGINEERING MATERIAL SPECIFICATION WSK-M70J8-A Copyright 2011, Ford Global Technologies, LLC Page 5 of 5 3.10.2 Accelerated, m
22、in AATCC Rating 4 (SAE J1960) Radiant Exposure tbd GJ/m2 Accelerated Weathering is only to be considered if for Engineering concurred special reasons no Florida results are available. Under such circumstances comparative testing only is allowed against materials of known Florida stability with ident
23、ical chemical type of resin. In case of differences in the test results of Florida exposure and the accelerated weathering the results of the Florida exposure shall prevail. Prior to examination the exposed samples must be cleaned with approved soap solution. After exposure in accordance with 3.10.1
24、 and 3.10.2 washed but unpolished exposure samples shall show a minimum degree of dulling, change of color and distinctness of image with both standard and catalyzed repair paint when compared to an unexposed retained master. Both bulk and repair shall alter in color, tone and gloss to the same degr
25、ee in the same direction. Only the slightest color change is permitted. These samples shall show no color change, or iridescence in excess of specified AATCC rating (AATCC Grey Scale for Evaluating Change in Color, 10 step). Gloss after exposure shall be minimum 60 units (60 glossmeter: FLTM BI 110-
26、01). The film shall be free from dirt and mildew. Unsoiled panels shall be preferred to those soiled by exposure. No chalking is permitted. The panels shall be completely free from evidence of cracking, checking, rusting, blistering, and peeling. One small area of the exposed panel shall be slightly
27、 polished with a current polish followed by a 24 h water immersion test of the complete panel according to FLTM BI 104-01. The panel is then again compared to the unexposed panel. Only a slight color change is permitted on the polished as well as on the unpolished area of the panel. 3.10.3 After Wea
28、thering Adhesion After Florida Exposure and/or accelerated weathering, adhesion shall be tested according to item 3.9.1. 3.10.4 After Weathering Water Resistance After Florida exposure and/or accelerated weathering, test specimens shall be tested according to FLTM BI 104-01 for 24 hours. Adhesion shall be tested according to item 3.9.1.
