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1、Material Specification Finish GMW14669 Organic Coating/Finish Performance for Exterior and Interior Metallic Materials 1 Introduction Note: Nothing inthisstandard supersedes applicable laws and regulations. Note: In the event of a conflict between the Eng- lish and the domestic language, the English
2、 language shall take precedence. 1.1 Scope.This performance standard applies to organic surface finishes onautomobilebody parts and components. 1.2 Mission / Theme. This standard covers the per- formance requirements for applied organic surface finishes on automobile body parts and components. Six t
3、ypes of requirements are specified in paragraph 1.3 dependent upon the severity of service operation of the component.All interior painted metal parts must also meet the requirements of GMW14444 Material Related Interior Part Performance. 1.3 Classification. 1.3.1 Type A1. Applicable to surface fini
4、shes used on the external body and on external components in areas of exceptionally severe service e.g., vehicle front, sides, and roof. 1.3.2 Type A2. Applicable to surface finishes used on the external body and on external components in areas of severe service operations e.g., vehicle rear- facing
5、 areas with little/no chipping exposure. 1.3.3 Type A3. Applicable to surface finishes used on external components which are not type A1 or A2, and for which performance requirements must be specially defined; this type typically is not used. 1.3.4 Type B1. Applicable to surface finishes used on int
6、ernal body parts and components in areas of exceptionally severe service operations e.g. solar direct sunlight exposure, andcorrosion itemsincon- tact with wet floor, such as lower seat structure. 1.3.5 Type B2. Applicable to surface finishes used on internal body parts and components in areas of se
7、vere or moderate service operation e.g., solar indirect sunlight exposure, and corrosion items readily visible near floor such as brake pedal arm, speaker grilles in lower door. 1.3.6 Type B3. Applicable to surface finishes used on internal components in areas of normal service operation e.g., solar
8、 no direct sunlight exposure; corrosion any other steel components visible with difficulty such as upper structure under seats, struc- tures visible with closures (e.g. glove box) open or seats folded.Note:structures not visible to cus- tomers (e.g. I.P. support) may require only temporary corrosion
9、 protection not covered under this standard. 1.3.7 It is anticipated that some interior components may have mixed service severity (e.g. B1 for corro- sion and B3 for solar). In this case the most severe type shall be listed and exception(s) noted on the engineering drawing. 1.3.8 This standard does
10、 not cover performance requirements for: 1.3.8.1 Organic coatings on highly stressed exterior parts (e.g. road wheels). See GMW14670 for steel wheels and/or GMW14885 for aluminum wheels. 1.3.8.2 Organic coatings on chassis components. See GMW14671. 1.3.8.3 Organic coatings on plastic parts.See GMW14
11、797. 2 References Note: Only the latest approved standards are appli- cable unless otherwise specified. 2.1 External Standards/Specifications. ISO 105-A02 ISO 2813 ISO 15184 SAE J1545 SAE J1767 SAE J1885 2.2 GM Group Standards/Specifications. GM9163P GM9509P Copyright 2007 General Motors Corporation
12、 All Rights Reserved Publication Department: GME Specification Center August 2007Page 1 of 9 PRD045 - VPRE ST 1 10/03 GMW14669GM EUROPE ENGINEERING STANDARDS GM9900P GME 60203 GME 60400 GME 60402 GME 60404 GME 60406 GMW3005 GMW3059 GMW3286 GMW14162 GMW14264 GMW14333 GMW14334 GMW14444 GMW14670 GMW146
13、71 GMW14700 GMW14701 GMW14729 GMW14797 GMW14829 GMW14872 GMW14873 GMW14885 GMW15282 GMW15287 GMW15356 GMW15357 HN 0283 HN 0292 3 Test Preparation and Evaluation 3.1 Resources. 3.1.1 Calibration. The test facilities and equipment shall be in good working order and shall have a valid calibration label
14、. 3.1.2 Alternatives.Alternative test facilities and equipment may also be used. However, all measur- ing variables as specified in this specification shall be determined correctly with respect to its physical definition. 3.1.3 Facilities. 3.1.3.1 Apparatus as required by the appropriate test method
15、s. 3.1.4 Equipment. Not applicable. 3.1.5 Test Vehicle / Test Piece. The size, dimen- sions and number of test pieces shall be as specified inthe relevant test method forthe propertyconcerned. 3.1.6 Test Time. Not applicable. 3.1.7 Test Required Information. Not applicable. 3.1.8 Personnel / Skills.
16、 Not applicable. 3.2 Preparation. Conditioning, where required, shall be as specified in the relevant test method for the property concerned. 3.3 Conditions.Subparagraphs were not applica- ble. 3.4 Instructions. Not applicable. 3.5 Data. Not applicable. 3.6 Safety.This standard may involve hazardous
17、 materials, operations and equipment. This standard does not propose to adress all the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior t
18、o use. 3.7 Documentation.Samples of components or material released to this standard shall be tested for conformity with the requirements of this standard and approved by the responsible GM Department prior to the start of delivery of production level components or materials. Any change to the compo
19、nent or material e.g. design, function, properties, manufacturing process and/or location of manufacture requires a new release of the product.It is the sole responsibility of the supplier to provide the customer, unsolicited, with documentation of any change or modification to the product/process,
20、and to apply for a new release. If not otherwise agreed to the entire verification test shall be repeated and documented by the supplier prior to start of delivery of the modified or changed product. In some cases a shorter test can be agreed to between the responsible GM Department and the supplier
21、. 3.7.1 Test Results. The results shall be represented in a test report with reference to this standard. 3.7.2 Deviations from Test Procedure. Deviations from the requirements of the test procedures shall have been agreed upon.Such requirements shall be specified on component drawings, test certific
22、ates, reports etc. 4 Requirements and Procedure 4.1 General. 4.1.1 Post-treatment.Post-treatments,ifper- formed, shall be Chrome VI free. Copyright 2007 General Motors Corporation All Rights Reserved Page 2 of 9August 2007 PRD045 - VPRE ST G 10/03 GM EUROPE ENGINEERING STANDARDSGMW14669 4.1.2 Chrome
23、 VI used as adhesion promoter is impermissible. 4.1.3 Coatings shall be Chrome VI free. 4.2 Cross Hatch Test. Test per GMW14829. Coatings must perform both as-received and after humidity exposure to GMW14729 of the hours shown. Type A1 and A2:Rating 0 after 120 h Type A3:Must be specially defined Ty
24、pe B1:Rating 0 to 1 after 96 h Type B2 and B3:Rating 0 to 1 after 24 h Note: Rating 0 requires 99 % adhesion, and Rating 1 requires 95 % 4.3 Testing to High Humidity Environments. Test per GMW14729. Type A1 and A2:240 h Type A3:Must be specially defined Type B1:96 h Type B2 and B3:72 h Performance:C
25、omponents shall show no surface change. 4.4 Corrosion Tests. The determination of the resis- tance of the organic coating to corrosion has to be done by a salt spray fog test or by a cyclic corro- sion test.If the coating is intended to be used for painting of aluminum substrates, an additional cycl
26、ic climate test is necessary (refer to paragraph 4.4.3). Body assembly or subassembly parts and compo- nents shall be tested in vehicle position. Interior com- ponents/assemblies shall have coverings (e.g. seat cushions) removed. 4.4.1 Salt Spray Fog Test (required for GME and GMHA only). Salt spray
27、 fog testing for 336 h (Type A1 and A2), 168 h (Type B1), 96 h (Type B2) and 24 h (Type B3) shall be performed according to GMW3286. No corrosion (except along scribe lines) blisters, or any change of surface allowed.Total scribe creepback determined per GMW15282 shall be 3 mm max. for all substrate
28、s. Exception: Zinc coated steel substrates 6 mm max. (The evaluation of scribe creepback can be determined by scrape and blow off with compressed air per GMW15282 or by using tape adhesion per GMW14829). Note: Slight rust at edges is permitted for Type B, but shall not exceed 20 % of the length of e
29、xposed edges. 4.4.2 CyclicCorrosionTest(requiredforall regions except GME and GMHA). A Cyclic corro- sion test per GMW14872 is required to be performed onnormallyprocessedparts,orrepresentative sections of parts.Refer to the Table in Appendix A for specific details associated with required test dura
30、tion for specified test class suffix, vehicle area, and mounting location. Type A:Corrosion Rating of 8 or better per GMW15356. Type B:Corrosion Rating of 8 or better per GMW15356 or GMW15357. 4.4.3 Cyclic Climate Tests for Exterior Painted Parts with Aluminum Substrates. Aluminum sub- strates may b
31、e tested and evaluated per either of the following two methods: 4.4.3.1 Cyclic Climate Test (for Aluminum sub- strates only).The determination of resistance of the coating to corrosion under cyclic alternat- ing conditions has to be performed according to GME 60203-F-Grade 7 or per an acceptable met
32、hod on agreement of the supplier and GM Materials Engineer.After the test, no corrosion or blisters ( 2 mm) except along the scribe line, or any change of surface are allowed.Total corrosion creepback according to GMW15282 shall be 2 mm max. (The evaluation of creepback can be realized by blowing wi
33、th compressed air or by using adhesive tape per GMW14829). 4.4.3.2 Filiform Corrosion Test (for Aluminum substrates only).Test parts per GMW15287. Painted parts must meet a filiform resistance require- ment of no more than 4 mm max.length of any filament from the scribe line after a period of 672 h
34、in humidity. Also, there shall be no filament growth on the non-scribed test surfaces at the end of test, excluding sample-prepared cut edges. 4.5 Scratch Resistance. Test per GME 60402. See paragraph 4.5.1 and 4.5.2 for test time duration and performance requirements. 4.5.1 144 h salt spray exposur
35、e (GME 60402 - 1A) Type A1, A2 and B1:Rating 1 Type A3:Must be specially defined Type B2, B3:Not applicable 4.5.2 72 h salt spray exposure (GME 60402-1B). Type A1, A2, A3, and B1:Not applicable Type B2:Rating 1 Type B3:Rating 1 (after 24 h salt spray) 4.5.3 Optionally, pencil hardness test per ISO 1
36、5184 may be used to evaluate scratch resistance; require- ment is 1H to 3H. Copyright 2007 General Motors Corporation All Rights Reserved August 2007Page 3 of 9 PRD045 - VPRE ST U 10/03 GMW14669GM EUROPE ENGINEERING STANDARDS 4.6 Cure Test. Test per GM9509P. Applicable to all coating types; shall sh
37、ow no more than slight barely observable change to paint sur- face (Rating 0 or 1). 4.7 Anti-Freeze Resistance. Test per GME 60406. Type A1 and A2:Rating 2 All other types:Not applicable Performance:No swelling, no dissolution, and no discoloration. 4.8 ResistancetoColorChange.Testper GMW14701. Type
38、 A1 and A2:Rating 0 All other types:Not applicable 4.9 Resistance to Surface Deterioration by Chem- ical Action. Test per GME 60404. Type A1 and A2:Rating 0 Type A3:Must be specially defined Type B1:Rating 1 Type B2 and B3:Not applicable 4.10 Resistance to Exterior Glass Washer Fluid. Test per HN 02
39、92. Type A:Rating 8 Type B:Not applicable Performance:Coating surface must show no less than subjective Rating of 8 per GMW14264. Note: Must choose fluid composition(s) (i.e.basic alcohol) appropriate for vehicle operating area(s). 4.11 Abrasion Resistance.Test per GME 60400 (where component size pe
40、rmits). Type A1 and A2: 1.2 l/m Type A3:Must be specially defined Type B1 and B2: 0.5 l/m Type B3:Not applicable 4.12 Fuel Resistance. Test per GMW14333 - A. This test shall be run only if specifically required by drawing notes. Type A1 and A2:Rating 2 Type A3:Must be specially defined Type B:Not ap
41、plicable Performance:No swelling, no dissolution, and no discoloration. No paint removal to previous surface, or lifting, peeling or defect in paint film. 4.13 Resistance to Cleaning Agents.Test per GMW14334. All Types:Rating 2 Alternatively, testing per GM9900P; satisfactory per- formance required
42、for all coating types. Note: Must choose cleaning compounds appropriate for and available in vehicle operating areas. 4.14 ResistancetoStoneImpact.Testper GMW14700 Method A (or B), and Method C. Type A1:Rating 8 Type A2:Rating 7 Type A3:Must be specially defined Type B:Not applicable 4.15 Gloss. Tes
43、t per ISO 2813. Gloss standards and measurement frequency are specified elsewhere in other documents by a GM Engineering Unit. 4.16 Weather Resistance.Paragraph 4.16.1 and 4.16.2 apply to topcoat systems only, for initial (paint) sample approval only. Note: These requirements apply to interior (Type
44、 B) parts only. Exterior (Type A) paint and part require- ments are covered in GMW3005. Note: These requirements were not intended for use in routine quality testing. Deviation from the stated requirements is subject to arbitration between the supplier and the appropriate GM Materials Engineer. 4.16
45、.1 Natural Weathering.Natural weathering is required for the validation process of a paint mate- rial itself. This test is not applicable for painted body parts; please referto AppendixBfor Specific Regional Requirements and Test Methodologies. 4.16.2 Accelerated Weathering. If a supplier shall be a
46、ble to prove a positive result of 2 years natural weathering test, the accelerated weathering test isnot applicable for body parts. Please refer to Appendix B for Specific Regional Requirements and Test Method- ologies. 4.16.3 Color measurements per SAE J1545 and SAE J1767 in CIELAB color scale, dE*
47、 3.0 (D65 illuminant, 10 observer, 45 geometry. 5 Provisions for Shipping Not applicable. Copyright 2007 General Motors Corporation All Rights Reserved Page 4 of 9August 2007 PRD045 - VPRE ST G 10/03 -,-,- GM EUROPE ENGINEERING STANDARDSGMW14669 6 Notes Subparagraphs were not applicable. 7 Additiona
48、l Paragraphs 7.1 All parts or systems supplied to this specifica- tion must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 7.2 Other additional requirements may be specified on the relevant component drawings. 8 Coding System Thisstandard shall bereferenced
49、inother documents, drawings, etc. as follows: Example: “GMW14669 Type X# (e.g. GMW14669 Type A1)” 9 Release and Revisions 9.1 Release. This standard originated in OCT 2005, replacing GME 00007. It was first approved by Global Materials Engineering in SEP 2006 and published in AUG 2007. Copyright 2007 General Motors Corporation All Rights Reserved August 2007Page 5 of 9 PRD045 - VPRE ST U 10/03 GMW14669GM EUROPE ENGINEERING STANDARDS Appendix A Requirements for Cyclic Corrosion Test (applicable to all regions excep