1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2015 10 09 Revised Separated A A3 see summary of revisions. 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 please consider WSS-M7C79-B2 instead. 3. REQUIREMENTS 3.1 APPROVED SOURCES This spe
2、cification requires the use of approved sources. Only the sources identified on the Ford Approved Source List (ASL) can be used when this specification is listed on the drawing, CAD file, or other documents. The list of approved sources is located within Ford at or available externally through a Fo
3、rd Materials Engineer. 3.2 PHYSICAL PROPERTIES 3.2.1 Non Volatile 15% min (not for Aerosols) (FLTM BI 102-01) 3.2.2 Storage Stability, min The storage stability must be adapted to the climate conditions at the individual plant. Min storage conditions for all waxes: 6 months at 32 C 12 months at 32 C
4、 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 After the storage, the material shall not show any insoluble separation or coagulation and must meet all specification requirements. 3.2.3 Density See Initial sample (ASTM D1475) +/- 0.05 g/m
5、L 3.2.4 Creeping Ability, 20 mm min (FLTM BJ 128-02) ENGINEERING MATERIAL SPECIFICATION WSS-M7C80-A3 Copyright 2015, Ford Global Technologies, LLC Page 2 of 4 3.3 PREPARATION OF TEST PANELS 3.3.1 Substrate Lab tests are for initial approval only. They shall be performed on standard test panels at 30
6、 - 40 micrometer film thickness. Lab test results are superseded by results from the proving ground evaluation. 3.3.2 Application Procedure, Laboratory Stir the wax for 15 minutes at 23 +/- 2 C, unless otherwise recommended by manufacturer. Shake-up spray cans as required by the supplier. Applicatio
7、n method required: a) Airless spray or b) Air assisted spray c) Aerosol spray After the required film 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. 3.4 DRY FILM PROPERTIES W
8、ax material must be suitable to form a closed continuous layer without voids and bubbles. After drying, the wax shall be sufficiently hard to withstand normal handling during final assembly without damage. It may be slightly tacky but must not stain cables, trim parts or clothing. 3.4.1 Dry Film Thi
9、ckness 30 40 m (FLTM BI 156-01) 3.4.2 Color Light beige or clear 3.4.3 Appearance Smooth homogeneous film 3.4.4 Drying Time Touch dry* 25 minutes Fully cured 24 hours *The wax shall be resistant against water impingement after the required time at 23 +/- 2 C. 3.5 RESISTANCE PROPERTIES 3.5.1 Resistan
10、ce to CETP 00.00-L-467 accelerated cyclic corrosion test Zn-coated steel and CRS test panels: Appearance: No surface corrosion, no edge corrosion 4 weeks Function: Max. Rust Grade 3 at open metal surfaces 6 weeks No malfunction (with components only) 9 weeks Evaluation after removing of the wax ENGI
11、NEERING MATERIAL SPECIFICATION WSS-M7C80-A3 Copyright 2015, Ford Global Technologies, LLC Page 3 of 4 3.5.2 Influence on Painted Surfaces (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 compoun
12、d using a cloth saturated with a suitable solvent. Examine visually for staining and test for evidence of softening.) 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/cle
13、arcoat and bumper enamel from current production according to respective specifications. 3.5.3 Resistance Against High Temperature No flow at 80 C (FLTM BV 118-01, modified as indicated below) Spray half of the panel with the test compound. Mark the edge of the wax and place the panel for 1 h in a c
14、onvection oven in a vertical position with the waxed half of the panel up. 3.5.4 Resistance Against Low Temperature -30 C (ASTM D522, Method B) No cracking or chipping allowed. 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 1
15、80 C over the mandrel. 3.5.5 Water Resistance Spraying Unit (e.g. faucet/water-tap) with spraying pressure of 0,5kg/cm (1 bar /14.5 psi) and with spray nozzle which gives a conical, solid spray over the complete test panel. The flat panel is intended to be oriented 5 +/-2 from the horizontal bottom.
16、 Distance between spraying nozzle and test piece shall be 300 mm. Water spraying should be approximate. 15 sec. The wax film shall be resistant against water impingement after full drying per para.3.3.4 Slight surface damage is acceptable after testing, but the wax must form a continuous layer. 3.5.
17、6 Humidity Test 480 h (Place panels at an angle of 15 - 30 to the vertical in a humidity cabinet at minimum of 98% R.H. (condensing water on waxed panel surface) at 40 +/- 2 C) No rust on the plane panel area or more than 1.5 mm creepage from edges, no blisters or slipping of the wax and damages of
18、the film allowed. Light re-emulsification is allowed, but has to disappear within 24 h after removal from the humidity cabinet. 3.5.7 Influence on Plastic and Rubber Assembly Parts (Test Method: Spray the material under test onto specimen surface and age for 7 days at 23 +/- 2 C. Test influence on v
19、olume and hardness by comparison with untreated plastic and rubber parts.) The material under test shall not deteriorate properties of rubber or plastic assembly parts placed in the spraying area during application. ENGINEERING MATERIAL SPECIFICATION WSS-M7C80-A3 Copyright 2015, Ford Global Technolo
20、gies, LLC Page 4 of 4 Substrates Specimens of brake hose, fuel line, heater hose. 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. 4. GENERAL INFORMATION The
21、 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 APPROVAL OF MATERIALS Suppliers desiring approval of their materials shall first obtain an expression of
22、 interest from Purchasing, Design or Product Development, and Materials Engineering. The supplier shall submit a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of the M
23、aterial Specification. Tested material samples must be available for review upon request and kept for a minimum of one year. Upon request, the supplier will review the associated quality control documents (Process Failure Mode and Effects Analysis, Control Plans, Certification testing) with Ford. 4.
24、2 SUPPLIERS ONGOING RESPONSIBILITY All materials must be equivalent in all characteristics to the material upon which approval was originally granted. Prior to making any changes to the material originally approved, whether or not such changes affect the materials ability to meet the specification r
25、equirements, the supplier shall notify the affected Supplier Technical Assistance (STA), Purchasing, and Materials Engineering activities of the proposed changes (with reasons) by submission of a completed Suppliers Request for Engineering Approval, SREA. For parts and components using Ford Engineer
26、ing Material Specifications, all samples tested to the specifications for Design Verification (DV), Production Verification (PV) and Production Part Approval Process (PPAP) sign off must be kept until Job 1. 4.3 RESTRICTED SUBSTANCE MANAGEMENT STANDARD Substance restrictions imposed by regulations o
27、r Company direction applies to the materials addressed by this document. The restrictions are identified in the Restricted Substance Management Standard WSS-M99P9999-A1 which is updated yearly. It is the suppliers responsibility to comply with this standard on a continuing basis through IMDS and or
28、GMAP reporting. 5. SUMMARY OF REVISIONS 2015 10 09 Separated A and A3 into separate documents when A was placed in I status. Removed Flash point. Revised density, Revised dry film from 40-50 to 30-40 microns Revised color and drying time Revised corrosion method from ASTM B117 to L-467 and revised acceptance criteria. Removed water displacing properties Removed resistance to acid atmospheres Removed Influence on adhesion of stonechip protection 2007 08 22 Added WSS-M7C80-A3 Revised 2., 3.4.1, 3.4.2,3.4.3, 3.4.4 & 3.6.4
