1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2010 12 14 N-STATUS No replacement named G. Weber, NA 1980 05 22 3.2.1 Revised CAR1-RD584605-1 1979 03 02 Released AJ1-6000-204 WP 3948-a Page 1 of 4 PAINT, STEEL, SURFACE CLEANLINESS - EXTERIOR ESB-M2P117-A
2、 NOT TO BE USED FOR NEW DESIGN 1. SCOPE: This specification establishes the minimum surface cleanliness of steel surfaces, relative to carbon deposits, required to insure adequate paint adhesion in a corrosive environment. 2. APPLICATION: This specification was released originally to control the sur
3、face cleanliness of visible exterior painted body panels. 3. REQUIREMENTS: 3.1 The steel surfaces shall be virtually free of rust and yellow, blue, or black oxide films. 3.2 SURFACE CLEANLINESS The finished surface shall be virtually free of carbonaceous material that may tend to form during anneali
4、ng, temper rolling or curing of coating materials. Acceptance shall be determined using the test method described below. 3.2.1 Carbonaceous Material (FLTM BZ 2-3, Method “A“) The surface carbonaceous material shall be determined on every fifth* coil of steel produced to this specification. The data
5、is to be accumulated on a monthly basis, and surface carbonaceous deposits shall not exceed 0.65 mg/ft2(7 mg/m2) on 90 % of the samples analyzed. The data including coil and heat identification should be forwarded to MSD - Quality Control after analysis by the steel producer. *Note: At the option of
6、 MSD - Quality Control, the sampling rate may be reduced when a supplier has demonstrated consistent compliance to this requirement. If any monthly sampling indicates that the 90 % compliance has not been achieved, the sampling rate shall revert to every fifth coil. The sampling rate may be increase
7、d when a suppliers monthly production is less than five coils, at the discretion of MSD - Quality Control Office. ENGINEERING MATERIAL SPECIFICATION ESB-M2P117-A WP 3948-b Page 2 of 4 When tested to the requirements of both para 3.2 and 3.3, test samples shall be obtained as indicated in Illustratio
8、n A. Conversion Chart in mm 3 76 12 305 16 406 ILLUSTRATION A THE GRAPHIC WHICH SHOULD APPEAR AT THIS POSITION OF THE SPECIFICATION CAN BE OBTAINED BY REFERENCING THIS SPECIFICATION NUMBER FROM: MATERIALS ENGINEERING ENGINEERING AND MANUFACTURING STAFF FORD MOTOR COMPANY SUITE 200 PARKLANE TOWERS EA
9、ST DEARBORN MICHIGAN 48126 PHONE: (313) 845-8295 3.3 PAINTABILITY The condition of the steel surface shall be such as to accept the cleaning action of the phosphate treatment as well as a zinc phosphate coating meeting performance specification ESB-M3P1-A or iron phosphate coating per specification
10、ESB-M3P2-A. 3.3.1 Phosphate Coating Panels shall be processed in accordance with the current Ford Process Standard for zinc phosphate treatment PL 53-33. A commercial spray washer shall be used, with test panels mounted on special racks designed to assure proper position and adequate phosphate cover
11、age. Coating weight shall be 150 mg/ft2(1.6 g/m2) minimum per FLTM AQ 1-2 on the steel surface. 3.3.2 Salt Spray Resistance There shall be no rust, blister creepage or loss of paint adhesion in areas more than 1/8 in (3 mm) from scribe marks after 240 h salt spray exposure per FLTM BI 3-1, of primed
12、 panels. Panel Preparation Panels phosphate coated per para 3.3.1 shall be baked for 10 minutes at 150 C and cooled to room temperature. ENGINEERING MATERIAL SPECIFICATION ESB-M2P117-A WP 3948-b Page 3 of 4 Primer Apply ESB-M6J119-B primer to a dry film thickness of 0.0009 +/- 0.0001 in (23 +/- 3 m)
13、. Bake 15 minutes at 135 C, and age 72 h at 20 - 25 C or 16 h at 43 C before testing. Testing per para 3.3 is normally performed only for initial material approval, or for the purpose of requalifying previously approved material that failed meeting the requirements of this specification. In case of
14、dispute between para 3.2.1 and para 3.3.2, the latter shall govern. 3.4 SAMPLING AND INSPECTION 3.4.1 Production Sampling Except as provided in para 3.4.2 during a production run, every fifth finished coil shall be selected and tested per para 3.2 for surface cleanliness. 3.4.2 Reduced Sampling The
15、producer shall maintain records of complete test results for each lot. When an audit of these records by the customer division verifies the process is under control, reduced sampling in accordance with a plan approved by the customer division may be authorized. In case eligibility for reduced testin
16、g is lost because of failure to meet the requirements of this specification or due to process change, normal testing shall be resumed. Reestablished eligibility for reduced testing may be authorized when the customer division determines that the requirements of initial eligibility, using normal test
17、ing, have again been met. 3.5 SUPPLIERS RESPONSIBILITY Material supplied to this specification must be equivalent to that originally approved. Changes in formulation or processing shall not be made without prior approval as described in Supplier Procedure I-A. 4. APPROVAL OF SUPPLIERS: Suppliers to
18、this specification must be approved by the affected product engineering office. Procedure for gaining approval of a specific material to a new/existing ES-M specification is contained in Supplier Procedure I-A. Approved new suppliers will be added to the Engineering Materials Approved Source List. E
19、NGINEERING MATERIAL SPECIFICATION ESB-M2P117-A WP 3948-b Page 4 of 4 5. GENERAL INFORMATION: This information is for direction of the user and is not a requirement for the supplier. 5.1 Carbon Test Method per FLTM BZ 2-3, Method “A“, para 3.2.1 is intended to duplicate cleaning for phosphating in ou
20、r assembly plants. In some instances the oils applied after annealing may not be removed totally by this method. To ascertain if high carbon values are caused by these oils a second method, Method “B“, is available which assures removal of the oils. This method is for information purposes only and should not be utilized as part of the regular production analysis. This alternate cleaning method could be pursued by the steel mill to ascertain the effect on the amount of carbon present as the result of oils applied at the temper roll phase and/or any subsequent oil application.
