1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 1 2011 09 02 Revised Revised document and added A2 suffix U. Mueller, FoE 2009 03 31 Activated U. Mueller Controlled document at www.MATS Copyright 2011, Ford Global Technologies, LLC Page 1 of 3 CAVITY WAX, HEAT KICK 60 C, WSS-M7C97-A I
2、MPROVED CREEP CHARACTERISTIC CORROSION PROTECTION, AUTOMOTIVE CAVITIES CAVITY WAX, HEAT KICK 60 C, WSS-M7C97-A2 IMPROVED CREEP CHARACTERISTIC, LOW VISCOSITY CORROSION PROTECTION, AUTOMOTIVE CAVITIES 1. SCOPE The materials defined by these specifications are solvent free based rust preventive compoun
3、ds with minimum 99% solid content and contain an UV- marker. 2. APPLICATION These specifications were originally released for cavity waxes sprayed into box sections below the floor panel (rocker panel, side and cross members, etc.), in the engine compartment and to lower areas of pillars, doors, hoo
4、d and tailgate. They are applied to the vehicle body after the paint process, prior to final assembly. WSS-M7C97-A is designed for the standard process where the tilting table is located after the heat kick oven. WSS-M7C97-A2 was designed for paint shops where the tilting table is located before the
5、 bodies enter the heat kick oven 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements for Production Materials (WSS-M99P1111-A). 3.2 MATERIAL PROPERTIES 3.2.1 Non Volatile content 99% min (FLTM BI
6、102-01) 3.2.2 Rheology A flow diagram to identify the characteristic properties of the material shall be added to the Initial Sample Report, together with a list of the relevant test parameter (temperature, shear rate, time, etc.) and equipment details. ENGINEERING MATERIAL SPECIFICATION WSS-M7C97-A
7、/A2 Controlled document at www.MATS Copyright 2011, Ford Global Technologies, LLC Page 2 of 3 3.2.3 Flow rate (FLTM BJ 128-01, apply 0.1ml droplets) Immediately after the application For WSS-M7C97-A WSS-M7C97-A2 At 23C 55 - 65 mm (+/-5 mm) 165 265 mm (+/-15 mm) At 60C 165 325 mm (+/-15 mm) 150 235 m
8、m (+/-15 mm) 3.2.4 Creeping Power (FLTM BJ 128-02, Method A) At 23C 20 mm (+/-2mm) min At 60C 35 mm (+/-2mm) min 3.2.5 Drying Film thickness on test panels 35 +/- 5 m, Oven heat (“Heat kick“) material to 60C for 1 min Wax according to this specification requires a heat kick to change the material to
9、 a drip free state Immediately after heating and cooling down to RT the material must be drip free. 3.2.6 Storage Stability 6 months at 32 C 3 months at 40 C General storage must be frost free. After the storage, the material shall not show separation or coagulation and must meet all specification r
10、equirements. 3.3 PERFORMANCE PROPERTIES Wax according to these specifications must meet all requirements of WSS-M21P35-A2. 3.4 REMOVAL The wax film must be removable from automotive topcoats and application facilities at any time without damaging the painted surface. The supplier must recommend a su
11、itable solvent/cleaner process in the Initial Sample Report. Relevant topcoat systems are: Body enamel, catalyzed repair enamel, plastic paint, repair paint materials. ENGINEERING MATERIAL SPECIFICATION WSS-M7C97-A/A2 Controlled document at www.MATS Copyright 2011, Ford Global Technologies, LLC Page
12、 3 of 3 4. GENERAL INFORMATION This information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.1 MATERIAL REFERENCE All related materials used for approval of cavity
13、wax according to this specification, e.g. substrate, paint materials, solvents, etc. as well as the application parameter (Density at 23 C, Flash point, viscosity curves, film thickness, drying conditions) shall be noted in the Initial Sample Report of the wax. 5. SUMMARY OF REVISIONS 2011 09 02 Revised title for A version Added A2 version Changed Viscosity to Rheology in 3.2.2. Changed flow rate requirements in 3.2.5. Added tolerance values for Creeping Power Changed Drying text, 3.2.5. Changed Storage Stability, 3.2.6 Change 3.3 text Add 3.4, REMOVAL
