1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 12 14 N-STATUS Replaced by WSS-M2P181-C G. Weber, NA 2003 08 12 Revised Para 3.0 inserted; Para 3.1, 3.2, 3.6, 4 deleted 1992 05 01 EP00E10176267000 Released C.E. Herriott concurred J Schult Printed copies are uncontrolled Copyright 2010,
2、 Ford Global Technologies, Inc. Page 1 of 3 PAINT PERFORMANCE, ZINC-RICH PRIMER, COOLING WSK-M2P168-A AND ALLIED TUBES NOT TO BE USED FOR NEW DESIGN 1. SCOPE This specification defines the performance requirements for a zinc-rich paint used as top coat over terne plate/zinc-plated tubes. 2. APPLICAT
3、ION This specification was released originally to provide additional corrosion protection for cooling and allied tubing. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Material
4、s (WSS-M99P1111-A). 3.3 SYSTEM COMPONENTS 3.3.1 Substrate Terne plated to WSD-M1A286-A2, or zinc plated to WSD-M1P85-A2, Type 1, or as specified on the Engineering Drawing. 3.3.2 Cleaning The surface to be coated must be free from oil, grease, dirt, rust and other foreign material. 3.3.3 Pretreatmen
5、t As required for paint adhesion. 3.3.4 Coating Material In accordance with zinc-rich primer ESA-M6J140-A or similar Ford Engineering approved material, or as specified on the Engineering Drawing. 3.4 FILM PROPERTIES 3.4.1 Color and Gloss (FLTM BI 109-01, FLTM BI 110-01) Grey, or as specified on the
6、 Engineering Drawing. Red and brown colors are not permitted. ENGINEERING MATERIAL SPECIFICATIONWSK-M2P168-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, Inc. Page 2 of 3 3.4.2 Initial Hardness The coating shall be sufficiently hard at time of packing and shipping to wit
7、hstand normal handling without damage. 3.4.3 Film Thickness, min (FLTM BI 117-01) 5.0 micrometers on coated tube, or as specified on the Engineering Drawing. 3.4.4 Coating Weight, min 36.0 g/m2or as specified on the Engineering Drawing. Suggested Method: 1) Weigh tubing. 2) Expose exterior surface o
8、f tubing to a paint removing solution. This may be 2:1 v/v solution of butyl cellosolve acetate (diethylene glycol monobutyl ether acetate) and ethylene glycol. 15 minutes at 175 C. 3) Wipe tubing clean using Scotch Brite, dry, and reweigh. Zinc-rich paint coating must be sufficient to meet all perf
9、ormance requirements of this specification. 3.5 RESISTANCE PROPERTIES 3.5.1 Preparation of Specimens If not specified otherwise, prepare specimens as follows: Cut straight pieces of tube approx. 250 mm in length. Seal both ends, ie, dip both ends into suitable warm liquid wax (e.g. paraffin) having
10、a melting point above 55 C or use suitable end caps. Fasten the ends of 4 specimens parallel to an ABS-plastic or equivalent panel approximately 300 x 100 mm using tape (e.g. 3M #898) and leaving a space of about 10 mm between each specimen and backing sheet. 3.5.2 Adhesion No chipping or flaking Te
11、st Method: Scribe the tubing surface to obtain a 4.0 mm square crosshatch covering a minimum of 180 of circumference and 25 mm in length of tubing. Apply 3M #898 type tape to the scribed surface. Remove tape slowly, applying an even consistent tension. 3.5.3 Chip Resistance (FLTM BI 107-01) Prepare
12、10 specimens according to item 3.5.1 but fasten without space each specimen and backing sheet. The specimens shall be equal or better than the standard approved by the appropriate Product Engineering Materials Laboratory. ENGINEERING MATERIAL SPECIFICATIONWSK-M2P168-A Printed copies are uncontrolled
13、 Copyright 2010, Ford Global Technologies, Inc. Page 3 of 3 3.5.4 Salt Spray Resistance 240 h (FLTM BI 103-01, ASTM D 610) Straight and Formed Tubes: The tubing must show no white corrosion, and less than 1.0% red rust over any 25.0 mm length when compared to ASTM D 610, Plate #6. Note: Formed Tubes
14、 are straight tubes bent evenly through 90 degrees around a 30 mm diameter mandrel. 3.5.5 Liquid Resistance The surface coating shall show no softening or other film defect when immersed for 24 h at 23 +/- 2 C in the current production versions (as specified by the appropriate Product Materials Engineering Activity) of the following materials. Brake Fluid Gasoline Diesl Engine Oil Power Steering Fluid Automatic Transmission Fluid Manual Transmission Fluid
