1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions Ver. 4 2008 07 18 N-STATUS SA-M1P9105 made N-STATUS, Replaced by WSD-M1P85-A1 G. Weber, FNA 1989 10 27 Inactivated Inactivated SA-M1P9106/SA-M1P9107 1973 12 20 ES/ER2694TC Released Page 1 of 5 MECHANICAL PLA
2、TING - ZINC NOT TO BE USED FOR NEW DESIGN SA-M1P9105-A MECHANICAL PLATING - (TIN/CADMIUM) INACTIVE SA-M1P9106-A MECHANICAL PLATING - (CADMIUM) INACTIVE SA-M1P9107-A 1. SCOPE: This specification is to control the performance of non-electrolytic coatings on iron or steel surfaces. 2. APPLICATION: Thes
3、e coatings are applied to parts where good corrosion protection is required and where electroplating would constitute a risk of hydrogen embrittlement. 3. REQUIREMENTS: 3.1 COMPOSITION *Min. Thickness SA-M1P9105-A Zinc 5 micrometres SA-M1P9106-A Tin/Cadmium (nominal 50/50) 6 micrometres SA-M1P9107-A
4、 Cadmium 5 micrometres *Minimum thickness required for adequate coating for 24 h salt spray resistance. 3.2 SALT SPRAY RESISTANCE (ASTM B 117) To be specified on Engineering drawing per Para: 3.5. (ASTM B117). Suggested salt spray minimum hours 24, 48, 72 and 96. Longer periods of time may be specif
5、ied if required. 3.2.1 The above requirements for both thickness and salt spray apply only to significant surfaces. The specified plate thickness shall be required only on such surfaces of parts other than threads or holes, as can be touched by a sphere 13 mm in diameter unless otherwise noted on dr
6、awings. On other surfaces such as holes, recesses, threads etc, where a controlled deposit cannot be obtained under normal plating conditions, the above requirements do not apply. Acceptance or rejection of parts submitted to this specification will be based on thickness and salt spray results on si
7、gnificant surfaces. 3.2.2 Salt Spray Evaluation Parts shall pass salt spray requirements if the tested coatings have six red spots or less for any 930 sq cm area that is visible to the unaided eye. A part is allowed one red rust spot on the significant surface for any size area, however the total ar
8、ea of the number of parts tested if ENGINEERING MATERIAL SPECIFICATION SA-M1P9105-A SA-M1P9106-A SA-M1P9107-A Page 2 of 5 over 155 sq cm in area, shall have not more than one red rust spot per 155 sq cm in area. Also a part showing a red rust spot larger than 1,5 mm diameter on a significant surface
9、 shall be evaluated as a failure. 3.2.3 Where it is necessary that plate thickness and salt spray resistance requirements be met in holes, recesses, threads etc, Engineering drawings will so specify. 3.3 Complete coverage is expected as normally obtained on properly cleaned parts. 3.4 Plating or pla
10、ting plus special finish must be the final operation. 3.5 The salt spray resistance shall be specified on the drawing. For salt spray performance more than 24 h it is expected that plating thickness appreciably greater than the minimum specified will be required. 4. METHOD: It is not intended to lim
11、it the formulae or procedure of plating or surface finish treatment except as inidicated below. Any process resulting in a satisfactory adherent plate or surface treatment finish, meeting the requirements outlines herein, will be approved. The chemical activator (surface conditioner) used in the non
12、-electrolytic process shall not be of such nature as to cause hydrogen embrittlement of hardened steel parts. 4.1 CLEANING REQUIREMENTS Steel parts containing 0,35 % carbon or more at the surface, or heat treated to Rockwell C-30 or higher, shall be cleaned using the principles defined in ASTM B-242
13、, Preparation of High Carbon Steel for Electroplating. Steel containing less than 0,35 % carbon at the surface, or lower than Rockwell C-30 in hardness, shall be cleaned using the principles defined in ASTM B-183, “Preparation of Low Carbon Steel for Electroplating.“ The preceding procedures shall b
14、e used except that electrolytic cleaning is not permitted, and acids (see 4,1 b) must be inhibited. Any pretreatment copper despositions shall be limited to the immersion coating. (a) Carburised parts must have been stress relieved for 1 h at 135 C minimum before cleaning. (b) None of the parts ment
15、ioned above shall be cleaned by acid solution unless specifically approved. 4.2 BRITTLENESS Parts supplied shall be free from the detrimental effects of hydrogen embrittlement or other factors which result in part brittleness. All heat treatment operations, including tempering or stress relief, shal
16、l be completed prior to plating. ENGINEERING MATERIAL SPECIFICATION SA-M1P9105-A SA-M1P9106-A SA-M1P9107-A Page 3 of 5 5. SPECIAL FINISHES: Treatments subsequent to mechanical plating may also be specified on the drawing for appearance, additional corrosion protection (especially white corrosion) et
17、c. The method of specifying special finishes will be to add the required special finish to the specification e.g. “SA-M1P9105-A plus Dichromate“ with “24 h Salt Spray Resistance“ specified on drawing, would require 24 h salt spray resistance minimum to both red rust (see 3.2) and white corrosion and
18、 5 micrometre minimum coating thickness. The following restrictions will apply:- Plus Dichromate Plus black or Treatment bright finish SAM-1P9105-A Up to 72 h Up to 48 h SAM-1P9106-A Up to 96 h Up to 96 h SAM-1P9107-A Up to 72 h Up to 48 h It should be noted that the Tin/Cadmium finish will not form
19、 white corrosion products and therefore the requirement is for red rust only. 5.1 Dichromate coatings are coloured conversion coatings, bright finishes are clear colourless conversion coatings and black finish is a conversion coating where a dull black finish is desired. Special finish shall not be
20、used as a substitute for plate thickness. In all cases, plate thickness requirements must be met on significant surfaces and salt spray resistance to corrosion as specified in 3.2 must be maintained. However, satisfactory parts shall not have a total of more than six red or white corrosion spots. (S
21、alt spray hour requirements to formation of red rust are not in addition to the hours to white corrosion products, but run concurrently). 5.2 HEXAVALENT CHROMIUM TEST ON CHROMIUM TREATED PARTS: Parts which have been treated with chromate solutions or chromic acid rinsed must be free from an excess o
22、f Hexavalent Chromium Ions when received by the Ford Motor Company, according to the following requirements:- Zinc, Tin/Cadmium and Cadmium plated parts Zinc, Tin/Cadmium and Cadmium plated parts which have been subjected to a process involving chromate solutions or a chromic acid rinse, must be sat
23、isfactorily rinsed in clean water to remove excess chromium ions from the surface. After the components have been given sufficient time to dry and the surface film to harden, ENGINEERING MATERIAL SPECIFICATION SA-M1P9105-A SA-M1P9106-A SA-M1P9107-A Page 4 of 5 they must give an indication of note mo
24、re than one part per million of chromate ions when tested to Quality Control Laboratory Test Method EU-AQ 6-2. 6. TEST METHOD: 6.1 THICKNESS TEST The thickness of plating shall be determined by a suitable acid dropping test, by magnetic methods such as Magne Gage, by electronic deplating (Kocour Tes
25、t) or by metallographic methods. In case of dispute between a supplier and the Ford Motor Company, the umpire method shall be the metallographic method. 6.2 SALT SPRAY TEST This test shall be conducted according to ASTM B 117. 6.3 VISUAL EXAMINATION Plated parts are subjected to surface inspection f
26、or such imperfections as excessively rough plate, lack of consolidation, incomplete covered areas etc. Loose plating or plating which is removed by pressure sensitive cellophane backed adhesive tape shall be considered as being plating lacking consolidation. The testing of the quality of plate by sa
27、lt spray and/or determination of coating thickness will be done on pieces passing this inspection. 6.4 STATISTICAL PROCESS Suppliers must conform to the requirements of Ford Quality System Standard Q-101. A mutually acceptable Control Plan as described therein is required for material/source approva
28、l. Appropriate statistical tools must be used to analyze process/product data so that variation in the final product is continuously reduced. 6.5 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approval was or
29、iginally granted. Prior to making any change in the properties, composition, construction, colour, processing or labelling of the material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the Supplier shall
30、 notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed changes and obtain the written approval of the Materials Engineering activity. Test data, test samples and a new code identification are to be submitted with the request. Substance restrictions imposed by
31、law, regulations or Ford, apply ENGINEERING MATERIAL SPECIFICATION SA-M1P9105-A SA-M1P9106-A SA-M1P9107-A Page 5 of 5 to the materials addressed by this document. The restrictions are defined in Engineering Material Specification WSS-M99P9999-A1, unless a different suffix (e.g. A2 or A3) is specifie
32、d on the engineering document for the application. 7. APPROVAL OF MATERIALS: Materials defined by this specification must have prior approval by the responsible Materials Engineering activity. Suppliers desiring approval of their materials shall first obtain an expression of interest from the affect
33、ed Purchasing, Design and Materials Engineering activity. Upon request, the Supplier shall submit to the affected Materials Engineering activity its own laboratory report to the specification (test results, not nominal values), the material designation and code number, and test specimens for Ford evaluation. Upon approval, the material will be added to the Engineering Material Approved Source List.
