1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2015 01 30 A -N Status A - No replacement or usage U. Mueller, EU 2007 08 22 Revised Added WSS-M7C80-A3 Revised 2., 3.4.1, 3.4.2, 3.4.3, 3.4.4 & 3.6.4 L. Rodrigues 1991 02 01 Released C01089481000 CD, KS Copyright 2015, Ford Global Tec
2、hnologies, LLC Page 1 of 5 RUST PREVENTIVE, WAX, SOLVENT RELEASE, WSK-M7C80-A UNDERBODY PROTECTION NOT TO BE USED FOR NEW DESIGN RUST PREVENTIVE, WAX, SOLVENT RELEASE, BODY PROTECTION WSS-M7C80-A3 1. SCOPE The material defined by these specifications is a solvent dispersed rust preventive compound c
3、onsisting of waxes and resins. 2. APPLICATION WSK-M7C80-A: was released originally for material used as a corrosion protection for the underbody and underbody assembled parts. WSS-M7C80-A3: was released originally for material used as a corrosion protection for the body and body assembled parts. Bot
4、h dry to a soft, homogenous film with high corrosion protection properties. The material is applied to the assembled vehicle. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Mat
5、erials (WSS-M99P1111-A). 3.4 PHYSICAL PROPERTIES A A3 3.4.1 Non Volatile, min 70% 15 (FLTM BI 102-01) 3.4.2 Flash Point 21 C 80 C (ASTM D 56) 3.4.3 Storage Stability, min The storage stability must be adapted to the climate conditions at the individual plant. Min storage conditions for all waxes: 6
6、months at 32 C 12 months at 32 C And 6 months at 5 C 12 months at 5 C Additionally for tropical climates: 3 months at 40 C 12 months at 40 C ENGINEERING MATERIAL SPECIFICATION WSK-M7C80-A WSS-M7C80-A3 Copyright 2015, Ford Global Technologies, LLC Page 2 of 5 After the storage, the material shall not
7、 show any insoluble separation or coagulation and must meet all specification requirements. A A3 3.4.4 Density +/- 0.05 g/mL 0.835+/- 0.150 g/mL (ASTM D 1475) 3.5 PREPARATION OF TEST PANELS (FLTM BJ 106-01, Solvent Wiped) 3.5.1 Substrate Ford Standard Steel Panels according to SAE J403 Steel or UMA
8、18006 if not otherwise required. 3.5.2 Application Procedure Stir the wax for 15 minutes at 23 +/- 2 C, unless otherwise recommended by manufacturer. Application method required: a) airless spray or b) air assisted spray The wax is applied in one coat without flash off time. After the required film
9、thickness has been achieved, the reverse side of the panel can be wax sprayed with a thin film to provide protection during test. Do not protect edges with special actions. 3.5.3 Application Temperature 20 - 25 C 3.6 DRY FILM PROPERTIES 3.6.1 Dry Film Thickness 40 - 50 micrometer (FLTM BI 156-01) 3.
10、6.2 Color Light beige or White according to Engineering Drawing 3.6.3 Appearance Smooth homogeneous film ENGINEERING MATERIAL SPECIFICATION WSK-M7C80-A WSS-M7C80-A3 Copyright 2015, Ford Global Technologies, LLC Page 3 of 5 A A3 3.6.4 Drying Time 5 minutes 25 minutes The wax shall be resistant agains
11、t water impingement after the required time at 23 +/- 2 C. 3.6.5 Removal The wax film must be removable at any time by a suitable solvent. 3.7 RESISTANCE PROPERTIES 3.7.1 Salt Spray Resistance 480 h (ASTM B 117) After dewaxing no rust on the plane panel area or more than 3 mm creep from edges is all
12、owed. 3.7.2 Influence on Painted Surfaces Must not stain, soften, lift, or otherwise degrade current OEM production and service paint materials. Substrates Ford standard steel panels painted with standard white, basecoat/clearcoat and bumper enamel from current production according to respective spe
13、cifications. Test Method Spray one half of the painted panels with the test compound. The test panels are stored in an oven for 16 h at 45 +/- 2 C. Wipe off the test compound using a cloth saturated with a suitable solvent. Examine visually for staining and test for evidence of softening. 3.7.3 Stai
14、ning of Unpainted Plastic No staining Bumper Material Substrates: Test panels from current production bumper material in a dark color. Test Method: Apply the test compound according to para 3.5 to test specimens and age 7 days at 23 +/- 2 C. Remove the wax coating with a suitable solvent and examine
15、 visually for staining and test for softening. ENGINEERING MATERIAL SPECIFICATION WSK-M7C80-A WSS-M7C80-A3 Copyright 2015, Ford Global Technologies, LLC Page 4 of 5 3.7.4 Resistance Against High Temperature No flow at 80 C (FLTM BV 118-01, modified as indicated below) Spray half of the panel with th
16、e test compound. Mark the edge of the wax and place the panel for 1 h in a convection oven in a vertical position with the waxed half of the panel up. 3.7.5 Resistance Against Low Temperature -30 C (ASTM D 522, Method B) No cracking or chipping allowed. Film thickness required: 40 - 50 micrometer 70
17、 - 80 micrometer Store the panels in a cold box together with a mandrel of 30 mm diameter for 24 h. While in the cool box, bend the panels 180 C over the mandrel. 3.7.6 Water Displacing Properties No rust permitted The test shall be performed according to B.S. 1133 Appendix B. 3.7.7 Humidity Test 48
18、0 h No rust on the plane panel area or more than 3 mm creepage from edges, no blisters or slipping of the wax and damages of the film allowed. Light reemulsification is allowed, but has to disappear within 24 h after removal from the humidity cabinet. Film Thickness Required 40 - 50 micrometer and 7
19、0 - 80 micrometer Test Method Place panels at an angle of 15 - 30 C to the vertical in a humidity cabinet at minimum of 98% R.H. (condensing water on waxed panel surface) at 40 +/- 2 C. 3.7.8 Influence on the Adhesion of Stonechip Protection Material for the Underbody (ASTM D 968) Abrasion resistanc
20、e of stonechip protection underbody coating after application of the material under test must be equal or better than abrasion resistance after application of approved production wax. For requirements for the abrasion resistance of stonechip protection underbody coating, see the respective specifica
21、tion. ENGINEERING MATERIAL SPECIFICATION WSK-M7C80-A WSS-M7C80-A3 Copyright 2015, Ford Global Technologies, LLC Page 5 of 5 Substrates Panels with approved stonechip protection material for the underbody, applied and cured according to respective specification with minimum and maximum curing cycles.
22、 Prior to abrasion resistance test, apply the test material on the first and approved underbody wax from current production on the second set of panels and age the panels 7 days at 23 +/- 2 C. 3.7.9 Influence on Plastic and Rubber Assembly Parts The material under test shall not deteriorate properti
23、es of rubber or plastic assembly parts placed in the spraying area during application. Substrates Specimens of brake hose, fuel line, heater hose. Test Method Spray the material under test onto specimen surface and age for 7 days at 23 +/- 2 C. Test influence on volume and hardness by comparison wit
24、h untreated plastic and rubber parts. Prior to abrasion resistance test, apply the test material on the first and approved underbody wax from current production on the second set of panels and age the panels 7 days at 23 +/- 2 C. 3.7.10 Resistance to corrosion on acid atmospheres Protection material for the body The material under test must not show any evidence of corrosion. Test Method Spray the material under test onto panel surface and age for 7 days at 23 +/- 2 C. Test resistance to corrosion when exposed to acid atmospheres using the NBR 10563 method.
