1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2012 04 12 N Status No usage or replacement N. Benipal, NA 2004 03 22 Revised Para 3.0 inserted; paras 3.1, 3.2, 3.7 and 4 deleted 1985 02 25 9P2-016AC-3 Released Controlled document at www.MATS Copyright 2012, Ford Global Technologies
2、, LLC Page 1 of 4 RUST PREVENTIVE - HOT MELT ESL-M7C67-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a solvent-free hot melt, dip applied rust and corrosion preventive compound, generally a mixture of waxes and resins. It shall be free of any fibrous fillers
3、such as asbestos. 2. APPLICATION This specification was released originally for material used to provide corrosion protection for chassis components such as frames where handling is infrequent. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers m
4、ust conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.3 APPLICATION CHARACTERISTICS Shall be suitable for dip application in a conventional hot melt system. The rust preventative must form a homogenous stable, non corrosive, protective film free of sediment o
5、r other contaminants. A typical film thickness of 75 - 125 micrometer can be expected at the application temperature of 121 - 143 C. 3.4 PHYSICAL PROPERTIES 3.4.1 Color Black 3.4.2 Flash Point, min 200 C (ASTM D 93) 3.4.3 Weight per Volume (ASTM D 816) At 25 C to 121 C 0.80 - 1.20 kg/L 3.4.4 Solids
6、Content, min 97.0% (ASTM D 2834, except bake a 20 g sample for 24 h at 121 +/- 3 C) 3.4.4.1 Solids Content, min 97.0% (EPA Method 24) 3.4.4.2 Ash Content, max 18% (ASTM D 1951) ENGINEERING MATERIAL SPECIFICATION ESL-M7C67-A Copyright 2012, Ford Global Technologies, LLC Page 2 of 4 3.4.5 Viscosity at
7、 120 C 90 - 250 mPa.s (Brookfield RVF Viscometer No. 1 spindle pre-heated at 120 C, 10 rpm, 60 s reading) 3.4.6 Shelf Stability All physical (After standing for a 2 month period at and performance 121 C, constant, slow agitation) requirements must be met 3.4.7 Hardness (ASTM D 1321) At 25 C, max 65
8、At 32 C, max 150 3.4.8 Removal Petroleum solvent, kerosene, approved chlorinated solvent or vapor degreasing. 3.4.9 Melt Flow Indicator 3.4.9.1 Requirement A No dripping of material after being suspended 4 h vertically at 100 C (212 F) with 75 - 125 micrometer film thickness. 3.4.9.2 Requirement B N
9、o dripping of material after being suspended 4 h vertically at 95 C (203 F) with 950 - 1050 micrometer film thickness. Test Method: Dip a panel (hole at both ends) in the rust preventive material, remove, and allow to dry in a vertical position for 24 h at 23 +/- 2 C. Invert panel and suspend vertic
10、ally in an oven for 4 h at the temperature and film thickness shown above. Any dripping or icicling of the rust preventative material is considered a failure. 3.5 PREPARATION OF TEST PANELS 3.5.1 Substrate Hot Rolled Steel P & O, 100 x 300 mm, 2 to 3 mm thick (Ref. para 5.1). 3.5.2 Application Proce
11、dure Prior to dip coating, alkaline clean and tap rinse panels until water breaks free. Condition test panels and the rust preventive in oven at 121 - 143 C. The test coating should be applied to a film thickness of 75 to 125 micrometer and allowed to age 72 h before performance testing. ENGINEERING
12、 MATERIAL SPECIFICATION ESL-M7C67-A Copyright 2012, Ford Global Technologies, LLC Page 3 of 4 3.6 RESISTANCE PROPERTIES 3.6.1 Gravelometer/Salt Spray Better than 4B (SAE J 400) after (SAE J400/ASTM B 117/ - 30 C gravelometer ASTM D 610) ASTM D 610 rust grade 5 or better after gravelometer/336 h salt
13、 spray Test Method: Run gravelometer test after conditioning panels 4 h at - 30 C. Age 24 h at room temperature, then subject to 336 h salt spray. Face rust evaluation shall be determined with the rust preventive material removed from panel. 3.6.2 Scribed Salt Spray Corrosion creepback or loss of (F
14、LTM BI 103-01) adhesion shall not exceed 3 mm either side of scribe centerline after 1000 h of salt spray. Test Method: Scribe at “X“ through material film and age 24 h. Expose test sample to 1000 h salt spray according to ASTM B 117. Within 15 minutes after completing salt spray, the panel scribe s
15、hall be subjected to high pressure air using a 3 mm non-restricted nozzle set directly in contact with the panel at a 45 angle. Air flow pressure should be set at 550 kPa. The hose ID shall be 6 - 10 mm and the hose length from the regulator to nozzle shall be no greater than 3 meters. 3.6.3 Weather
16、 Resistance/ No greater than 3 mm creep or Salt Spray rust, no “mud“ cracking or other (FLTM BO 101-01 or QUV surface defects. Slight gloss Thermal Aging (QFS 40 change O.K. bulb) per SAE J1804/ ASTM B 117) Test Method: Expose test sample to 100 h of Weatherometer according to FLTM BO 101-01 or QUV
17、Cycle. Scribe an “X“ through material film and age 24 h followed by 336 h of salt spray per ASTM B 117. Perform blow-off procedure in para 3.6.2. 3.6.4 Detergent Wash No blistering, loss of adhesion Resistance or permanent change in color. (Detergent solution is composed of 2.5 g Car Wash Concentrat
18、e or equivalent per liter of water) Test Method: Immerse panel in detergent solution at 50 C. Rinse panel with 50 C tap water through spray nozzle set at 70 kPa pressure and positioned 250 mm from panel. 3.6.5 Proving Ground Resistance (CETP 00.00-R-311 (P3-76-A) Component shall comply with the WPAS
19、 Corporate Corrosion Guidelines of the WCR for appearance and function. ENGINEERING MATERIAL SPECIFICATION ESL-M7C67-A Copyright 2012, Ford Global Technologies, LLC Page 4 of 4 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 PANEL INFORMATION Hot rolled test panels are manufactured from commercial quality hot rolled steel. The panels are available from Advanced Coating Technologies Inc. (ACT). ACT P.O. Box 735 Hillsdale, MI 49242 ACT Product Code - APR 14312
