1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2014 09 04 N Status Replaced by WSS-M7C91-B T. Covert, NA 2004 03 10 Revised Para 3.0 inserted; paras 3.1, 3.2, 3.3, 3.8 and 4 deleted 1994 01 31 Released NGA1E10370437001 J. Lott Controlled document at www.MATS Copyright 2014, Ford Gl
2、obal Technologies, LLC Page 1 of 2 CORROSION PREVENTIVE COMPOUND WSL-M7C91-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a water-based corrosion preventive compound suitable for post underbody vehicle or individual component usage requiring minimal or no pret
3、reatment. 2. APPLICATION This specification was released originally for use in post-painting fuel tank (material per WSL-M1A325-A1) weld seam areas. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirem
4、ents For Production Materials (WSS-M99P1111-A). 3.4 PHYSICAL PROPERTIES 3.4.1 Non-volatile Solids, by weight, min 50% (ASTM D 2369) Volatiles Balance (Shall be composed of 70% water min) 3.4.2 Color Gray/silver 3.4.3 Flash Point, min No flash (ASTM D 56) 3.4.4 Stability 3.4.4.1 Gassing, min No gas (
5、FLTM BI 102-03, 72 h) 3.4.4.2 Storage Stability Shall not jell, settle hard or have a viscosity change from the original in excess of 5,000 mPa.s when left undisturbed for 120 d at 23 +/- 2 C. 3.4.5 Weight per Volume 1.13 - 1.18 kg/L (ASTM D 1475) 3.4.6 Emissions 3.4.6.1 Volatile Organic Content .01
6、4 - 0.062 kg/L (VOC), max (ASTM D 3960) ENGINEERING MATERIAL SPECIFICATION WSL-M7C91-A Copyright 2014, Ford Global Technologies, LLC Page 2 of 2 3.5 PREPARATION OF TEST PANELS (ASTM D 609/FLTM BJ 106-01) 3.5.1 Substrate The test panels must have the same substrate, i.e. Al-rich paint over Zn-Ni plat
7、ed low carbon steel, as the production intent component. 3.5.2 Application Procedure Spray the test compound to a wet film thickness of 0.25 +/- 0.025 mm using an airless spray pump equipped with appropriate size orifice to produce a “flat“ (in one plane) spray pattern. 3.5.3 Aging Panels shall be a
8、ged for 72 h at 23 +/- 2 C or 16 h at 43 +/- 2 C before running adhesion or resistance tests. 3.6 DRY FILM PROPERTIES 3.6.1 Application Temperature 15 30 C 3.6.2 Drying Time (ASTM D 1640, para 6.6) Material must be dry to handle after 5 minutes max. 3.6.3 Removal Must be readily removable from paint
9、ed surfaces, bright trim, interior trim, glass, vinyl roofs, tires, etc. using water or commercially available cleaners without damaging the substrate. 3.7 RESISTANCE PROPERTIES 3.7.1 Salt Spray Resistance, min 1000 h (ASTM B 117) No corrosion or loss of material adhesion allowed beyond 2.0 mm from
10、scribe. No overall rust spots greater than 6.0 mm are allowed. 3.7.2 Abrasion Resistance, max 5% (SAE J400, 0.5 L of gravel at 20 C) 3.7.3 Adhesion, max Grade 1 (FLTM BI 106-01, Method B) 3.7.4 Thermal Shock, Removal From Scribe, max 20 mm (FLTM BI 107-05, except: steam nozzle 500 mm from panel) 3.7.5 Corrosion Protection 30 cycles APG Must meet ASTM D 610, Grade 6 or better.
