FORD WSS-M21P40-A2-2002 CORROSION PROTECTIVE COATING MECHANICAL ZINC PLATE TRIVALENT CHROMATE LUBRICATED ALUMINUM-RICH ORGANIC TOPCOAT SILVER (Shown on WSS-M21P40-A1)《经润滑的富铝有机外涂层用银.pdf
《FORD WSS-M21P40-A2-2002 CORROSION PROTECTIVE COATING MECHANICAL ZINC PLATE TRIVALENT CHROMATE LUBRICATED ALUMINUM-RICH ORGANIC TOPCOAT SILVER (Shown on WSS-M21P40-A1)《经润滑的富铝有机外涂层用银.pdf》由会员分享,可在线阅读,更多相关《FORD WSS-M21P40-A2-2002 CORROSION PROTECTIVE COATING MECHANICAL ZINC PLATE TRIVALENT CHROMATE LUBRICATED ALUMINUM-RICH ORGANIC TOPCOAT SILVER (Shown on WSS-M21P40-A1)《经润滑的富铝有机外涂层用银.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2002 06 11 Activated D. Drobnich Printed copies are uncontrolled Page 1 of 5 Copyright 2002, Ford Global Technologies, Inc. CORROSION PROTECTIVE COATING, ELECTROLYTIC WSS-M21P40-A1 ZINC PLATE, TRIVALENT CHRO
2、MATE, LUBRICATED ALUMINUM-RICH ORGANIC TOPCOAT, SILVER CORROSION PROTECTIVE COATING, MECHANICAL WSS-M21P40-A2 ZINC PLATE, TRIVALENT CHROMATE, LUBRICATED ALUMINUM-RICH ORGANIC TOPCOAT, SILVER 1. SCOPE The materials defined by these specifications are corrosion protective coatings over steel. They con
3、sist of an electrolytic or mechanical zinc plate, a hexavalent chromium free conversion coating, and an integrally lubricated aluminum-rich topcoat. This coating system provides enhanced corrosion protection, color and/or consistent torque-tension control. They are free of hexavalent chromium, nicke
4、l, lead and cadmium. 2. APPLICATION These specifications were released originally for materials used for corrosion protective coatings over steel. They are suitable for externally and internally threaded fasteners and non-threaded parts where a high level of corrosion is required. The cure temperatu
5、re for the aluminum rich topcoat is 200 to 220 C. These coatings shall not be specified if this temperature adversely affects the component being coated. These coatings provide good bi-metallic corrosion resistance when in contact with aluminum. They should not be applied to parts in contact with un
6、coated copper, magnesium or stainless steel surfaces. 2.1 SERVICE TEMPERATURE The maximum continuous service temperature resistance of A1 and A2 is 260 C. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Re
7、quirements For Production Materials (WSS-M99P1111-A). ENGINEERING MATERIAL SPECIFICATION WSS- M21P40-A1/A2 Page 2 of 5 Copyright 2002, Ford Global Technologies, Inc. 3.2 LICENSEE APPLICATOR QUALITY REQUIREMENTS Applicators must follow coating manufacturer procedures and recommendations for chemical
8、usage, equipment and processing. 3.3 MATERIAL PERFORMANCE 3.3.1 Raw Material Storage Stability The material must be capable of being stored at 23 +/- 2 C for 60 days without detrimental effect to the performance of the coated parts. 3.3.2 Cleaning Prior to coating, the parts shall be free of oil, sc
9、ale, and similar foreign materials. The cleaning process shall have no detrimental effect on the substrate, including freedom from embrittlement. 3.3.3 Curing The topcoat is typically cured at 200 to 220 C and shall not be used on materials that are adversely affected by these material temperatures.
10、 Parts must be sufficiently cured at the time of packing to withstand normal handling and shipping without marring. 3.3.4 Finished Condition Parts must be dry to touch such that, when held with a Watmans No.41 filter paper, or equivalent, and applying hand pressure for 5 to 10 seconds, there shall b
11、e no visible staining of the filter paper when viewed without using supplementary magnification. For referee purposes this test shall be carried out using a force of 10N. 3.3.5 Appearance The coating shall be uniform in color and free from discontinuities when viewed without magnification. 3.3.6 Sto
12、rage Life Parts supplied shall still meet the specific requirements of this specification 6 months after receipt by Ford when stored at 5 to 28 C with no direct heat or sunlight. ENGINEERING MATERIAL SPECIFICATION WSS- M21P40-A1/A2 Page 3 of 5 Copyright 2002, Ford Global Technologies, Inc. 3.4 ADHES
13、ION The cured coating shall withstand normal handling, storage and installation without flaking or peeling or other loss of adhesion. Parts heated to 120 C for 60 minutes shall not exhibit blistering, peeling, flaking or coating which can be removed by a filament type tape, such as 3M No. 898-2. The
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