1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 0 2014 09 04 Released T. Covert, NA Controlled document at www.MATS Copyright 2014, Ford Global Technologies, LLC Page 1 of 2 CORROSION PREVENTIVE PAINT WSS-M7C91-B 1. SCOPE The material defined by this specification is a water-based (la
2、tex) paint corrosion preventive compound suitable for post-painting fuel tanks. 2. APPLICATION This specification was released originally for use in post-painting fuel tank weld seam areas and high draw areas for additional corrosion protection. The material is typically applied to steel that has be
3、en zinc-nickel electroplated and coated with an aluminum rich organic coating per WSS-M1A325-B1. 2.1 LIMITATIONS The liquid form of the material is water based and is sensitive to freezing. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must
4、conform to the Companys Standard Requirements for Production Materials (WSS-M99P1111-A). 3.2 PHYSICAL PROPERTIES 3.2.1 Non-volatile Solids, by weight 45% min (ASTM D2369) Volatiles Balance (Shall be composed of 70% water min) 3.2.2 Volatile Organic Content, (VOC) 0.06 0.096% (ASTM D3960) 3.2.3 Color
5、 Gray/silver 3.2.4 Flash Point No flash (ASTM D56) 3.2.5 Stability 3.2.5.1 Storage Stability Material shall process at the applicators facility after storage for 180 days at 40 C and still meet the requirements of this specification. 3.2.5.2 Temperatures Requirements Must be stored and shipped above
6、 0 C to prevent freezing 3.2.6 Weight per Volume 1.08-1.32 kg/L (ASTM D1475) ENGINEERING MATERIAL SPECIFICATION WSS-M7C91-B Copyright 2014, Ford Global Technologies, LLC Page 2 of 2 3.3 PREPARATION OF TEST PANELS 3.3.1 Substrate The test panels must have the same substrate as the production intent c
7、omponent. i.e. Al-rich paint over Zn-Ni plated low carbon steel. 3.3.2 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. 3.3.3 Application Tem
8、perature 15 30 C 3.3.4 Drying Time This material can be air dried or oven forced dried per the coating supplier reiteration depending particular manufacturing plant. The paint must be sufficiently cured for shipping so there is no loss of paint performance if shipped below 0 C. Material must be dry
9、in the plant so there is no damage to the paint finish during handling. 3.4 DRY FILM PROPERTIES 3.4.1 Dry paint film thickness must be specified on the part drawing. 3.5 RESISTANCE PROPERTIES Panels shall be aged for 72 h at 23 +/- 2 C or 16 h at 43 +/- 2 C before running adhesion or resistance test
10、s 3.5.1 Chip Resistance 9C max (SAE J400, 0.5 L of gravel, at 20 C) No chips6mm dia. 3.5.2 Adhesion Grade 1 or (FLTM BI 106-01, Method B) better 3.5.3 Thermal Shock, Removal from Scribe 20 mm max (FLTM BI 107-05, except: steam nozzle 500 mm from panel) 3.5.4 Corrosion Protection Panel or Parts Grade
11、 10 (12 weeks of 00.00-L-467, Rate per ASTM D610) 3.5.5 Corrosion Protection, Vehicle (initial validation only) (12 weeks of 00.00-R-343) Requirement: Must meet Total Vehicle Corrosion Resistance Trustmark 18-0040 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications.
