1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2003 08 28 Revised Para 3.0 inserted; Para 3.6 & 4 deleted 1979 08 17 Released CW2K-822892-C Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 1 of 1 HARDCOAT ANODIZE FINISH FOR ALUMINUM UNSEALED ESA-M4P8-C 1.
2、 SCOPE This specification covers the hard coating of aluminum parts. 2. APPLICATION This process is generally used to provide added wear resistance to aluminum parts for use in brake systems. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers mus
3、t conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1 PROCESS The method used shall be an electrolytic treatment with the part forming the anode and with contact points on non-critical portions of the part. The parts shall not be sealed. Washing in water at 6
4、5 C max temperature to facilitate drying is permissible. 3.2 COATING THICKNESS, min 0.0127 mm 3.2.1 Test Method: Microscopic examination (Umpire Method) is performed by direct measurement under the microscope. The sample to be measured is mounted and polished as for metallographic examination so tha
5、t a cross section of the film (coating) is presented to view. The coating thickness is determined by measurement with a calibrated micrometer eyepiece. Alternate methods of thickness determination which the supplier can demonstrate as correlating with microscopic examination are permissible. 3.3 UNI
6、FORMITY OF COATING The hard coating shall be continuous, smooth, adherent, uniform in appearance and shall be free from powdery areas, loose films, discontinuities such as breaks and scratches or other damage. The size and number of contact marks shall be kept to a minimum consistent with good pract
7、ice. 3.4 SURFACE HARDNESS File hard to Rc 50 file using test procedure outlined in SAE J 864. Test must be performed on area of sample such that the full width of the file can be utilized. File width should be no greater than 12 mm. 3.5 PROCESS CONTROL All processing must be documented. Any changes in processing must have prior engineering approval.
